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Copyright of World Nuclear Geoscience is the property of World Nuclear Geoscience Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A molybdenum-bismuth sulfide ore in Hunan Province contains 0.05% molybdenum and 0.1% bismuth. And the traditional flotation process, i.e., full flotation of molybdenum-bismuth-sulfur-separation of molybdenum from bismuth-sulfur-separation of bismuth-sulfur, exists with low recovery of molybdenum and bismuth, complicated pharmaceutical system, larger dosage of pharmaceuticals, and higher production cost. In order to strengthen the separation of molybdenum and bismuth, calcium hypochlorite was introduced to replace sodium sulfide as bismuth depressant, and the flotation process of this molybdenum-bismuth sulfide ore was optimized. The new flotation process is molybdenum-bismuth mixed flotation-molybdenum-bismuth separation-sulfur flotation, which can obtain a molybdenum concentrate with molybdenum grade of 42.02 % and molybdenum recovery of 81.45% and a bismuth concentrate with bismuth grade of 42.23% and bismuth recovery of 76.38%. Compared with the traditional flotation process, the new process increased the grade and recovery of molybdenum concentrate by 1.63 and 2.35 percentage points, and that of bismuth concentrate by 11.98 and 9.21 percentage points, and at the same time reduced the content of pH, COD, suspended solids, and some heavy metal ions in the beneficiation wastewater, which is of good industrial value and broad application prospect. [ABSTRACT FROM AUTHOR]

Address to poor adaptability of traditional smelting methods to raw materials like bismuth concentrate, especially unsuitable for low-grade bismuth concentrate, low comprehensive recovery rate of valuable metals, difficult treatment of low concentration SO2 produced by pyrometallurgy, and high cost, a new process for separating molybdenum, tungsten, sulfur and bismuth by pressure oxidation alkaline leaching was proposed using low grade bismuth polymetallic concentrate of Shizhuyuan as raw material. The effects of alkali dosage, time, temperature, total pressure and liquid-solid ratio on the leaching rate of molybdenum, tungsten, sulfur and bismuth were studied. Under the optimum conditions, the leaching rate of molybdenum, tungsten and sulfur is 99.73%, 90.81% and 97.69% respectively, while bismuth remains un-leached and is enriched in the slag, which realizes the efficient separation of molybdenum, tungsten, sulfur and bismuth in low-grade bismuth polymetallic concentrates. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to achieve higher degradation efficiency, it is indispensable to use photocatalysts in the field of wastewater treatment. Researching and preparing bismuth-modified TiO2 photocatalysts (Bi-TiO2 photocatalysts) and analyzing their photocatalytic performance are essential. Bismuth-based material and TiO2 solution were separately prepared, and by mixing the two substances, the bismuth-modified TiO2 photocatalyst was obtained. Using methyl orange as the test model solution, the catalytic performance of this photocatalyst at different ratios of bismuth-based material to TiO2, different temperature conditions, light conditions, and photocatalytic durations was tested to verify the impact of methyl orange solution concentration and pH value on the photocatalytic effect. Experimental results showed that when the mass ratio of bismuth-based material to TiO2 was 1∶1, the photocatalyst exhibited the best degradation and decolorization effects, demonstrating excellent photocatalytic performance. The Bi-TiO2 photocatalyst exhibited varying degrees of methyl orange degradation ability, with the degradation rate initially increasing and then decreasing with the change in the ratio of bismuth-based material to TiO2. The optimal photocatalytic performance of this catalyst was observed at a temperature of 45 ℃ and under 15 h of light exposure. When the temperature exceeded 120 ℃, the photocatalytic effect of the catalyst tended to stabilize. The photocatalytic performance was more ideal at a methyl orange mass concentration of 20 mg/L and a pH value of 4. Environmental concentration had minimal impact on the photocatalytic performance of the Bi-TiO2 photocatalyst. Regardless of the variation in methyl orange mass concentration, the catalyst exhibited strong photocatalytic effects, with the best decolorization effect observed at a methyl orange mass concentration of 20 mg/L. The catalyst showed the highest methyl orange decolorization rate at a pH value of 4. Therefore, it is evident that the introduction of bismuth significantly enhances the photocatalytic performance and visible light responsiveness of TiO2. [ABSTRACT FROM AUTHOR]

The raw ore of the Shizhuyuan tungsten tin molybdenum bismuth polymetallic mine in Hunan Province contains a small amount of copper resources. During the process of molybdenum bismuth mixing separation flotation, most of the copper is enriched in the bismuth concentrate (with a Cu grade of about 3%). To improve resource utilization, process mineralogical analysis and copper recovery experiment were conducted on the copper bismuth concentrate. The results show that the main factor affecting copper recovery is the erosion of copper and bismuth mineral surfaces by a large amount of sodium sulfide during front-end operations, resulting in a significant decrease in the floatability of copper, bismuth, and sulfur minerals and a closer proximity. The particle size of each metal mineral in bismuth concentrate is fine (-0.023mm content is nearly 70%); The flotation process of "flotation drug (mud) removal - rough selection - fine rough selection, two fine and two fine scavenging selection" was adopted. CaO+CK-DB was used to suppress bismuth minerals, and Z-200+F6 selective flotation of copper minerals. The laboratory closed circuit test obtained a copper concentrate with a yield of 7.22%, a Cu grade of 23.41%, a Bi content of 1.12%, and a Cu recovery rate of 53.28%, The Bi loss rate in the copper concentrate was 0.27%, effective recovery of low-grade associated copper. The experiment results can provide technical basis for enterprises to further expand their metal variety spectrum. [ABSTRACT FROM AUTHOR]

High-performance metal halide perovskites solar cells are currently in the transition from laboratory research to industrial production and have demonstrated their immeasurable application value in the future global energy field.To achieve high-performance metal halide perovskite solar cells, the perovskite materials used as active working layers have undergone a decade-long optimization process resulting in significant progress. Focusing on the modulation research of metal-site bismuth ion doping in high-performance halide perovskites, this paper provides a systematic summary of the development and conventional preparation process of halide perovskites thin films. Researches have shown that ternary cationic perovskites can inhibit the formation of the yellow phase, change grain size, and improve stability, etc., and become the primary choice for future high-performance perovskite photoelectric devices. The following section discusses the Bi3+ doped perovskite system. The special electronic structure and non-toxic chemical properties of Bi3+ improve the stability of perovskites and regulate the photoelectric properties, resulting in the preparation of high-performance solar cells. Finally, based on the current research status of halide perovskites solar cells, we foresee that the bismuth ion doping strategy and ternary mixed cation perovskites can be combined in the future device optimization processes. Additionally, several potential research directions for achieving high-performance metal halide chalcogenide solar cells are highlighted. [ABSTRACT FROM AUTHOR]

Copyright of Iron Steel Vanadium Titanium is the property of Iron Steel Vanadium Titanium Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to obtain the retrievable photocatalytic material, the monolithic Bi2WO6/graphene aerogel was successfully prepared by solvothermal method combined with freeze-drying. The materials were characterized by SEM, XRD, FT-IR and UV-Vis. The effects of different hydrothermal temperatures on the morphology, structure and properties of Bi2WO6/graphene aerogel were investigated. The results show that when the hydrothermal temperature is 120 ℃, the material has good integrity; and when the hydrothermal temperature is 110 ℃,the material has good photocatalytic activity. The degradation rate of Rhodamine B can reach 99.7% after 120 min illumination with 500 W xenon lamp. [ABSTRACT FROM AUTHOR]

The latest research progress of ultrathin bismuth-based materials in the field of photocatalysis in recent years is reviewed, including pollutant degradation, photocatalytic hydrogen evolution, and reduction of carbon dioxide. As an innovative kind of semiconductor photocatalytic material, bismuth-based material is a kind of photocatalyst with moderate band gap, low cost, non-toxic and harmless. Its band gap adjust-ability and morphology adjustability provide the basic conditions for achieving good photocatalytic performance under ultrathin structure. The development of visible-light-responsive photocatalysts with two-dimensional layered structures has attracted extensive interest from scholars. Then, various bismuth-based photocatalytic materials that have been extensively studied are briefly introduced. The synthesis and modification methods of ultrathin bismuth-based photocatalysts are summarized, including sonication-assisted liquid exfoliation, ion intercalation-assisted liquid exfoliation, hydro/solvothermal synthesis, atomic layer deposition, etc. The problems existing in the preparation of ultrathin bismuth-based photocatalysts and the potential application value and development trend in the future are prospected. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To probe into the effects of Chuyou Yuyang Mianjian granules combined with bismuth quadruple therapy on Helicobacter pylori (Hp) eradication rate and inflammatory factors in patients with HP infection)associated chronic gastritis, so as to provide reference for promoting the outcome of Hp infection-associated chronic gastritis. METHODS: In this prospective randomized controlled study, 96 patients with Hp infection-associated chronic gastritis admitted into the hospital from Mar. 2020 to Feb. 2022 were extracted to be equally divided into the observation and control groups via the random number table method, with 48 cases each group. The control group received bismuth quadruple therapy, while the observation group was additionally treated with Chuyou Yuyang Mianjian granules on the basis of the control group, with 14 d as a course of treatment for both groups. The evaluation items included the clinical effect, inflammatory factors [ serum interleukin ( IL)-1β, IL-6, IL-8, tumor necrosis factor α (TNF-α), nuclear transcription factor κB (NF-κB)], adverse drug reactions and HP eradication rate during one course of treatment. RESULTS: During the treatment period, two patients in the observation group were excluded due to did not follow the medical orders, and one patient in the control group was excluded due to the use of non-research drugs. Totally 46 cases in the observation group and 47 cases in the control group were enrolled as the actual study subjects. There was no significant difference in the total effective rate between the observation group and the control group [89. 13% (41 / 46) vs. 80. 85% (38 / 47),P>0. 05]. In terms of improvement degree, the clinical recovery rate of the observation group was 39. 13% (18 / 46), significantly higher than 23. 40% (11 / 47) of the control group, with statistically significant differences (P<0. 05). During one course of treatment, the serum levels of IL-1β, IL-6, IL-8, TNF-α and NF-κB in two groups were lower than those before treatment, and the above indexes in the observation group were significantly lower than those in the control group, with statistically significant differences (P< 0. 05). There was no statistical significant difference between two groups in terms of safety indexes and adverse drug reactions (P>0. 05). Results of 14C-UBT test showed that the Hp eradication rate in the observation group was higher than that in the control group, the difference was statistically significant (P<0. 05). CONCLUSIONS: Chuyou Yuyang Mianjian granules combined with bismuth quadruple therapy in the treatment of patients with Hp infection-associated chronic gastritis can effectively inhibit the inflammatory response and improve the Hp eradication rate without increasing adverse drug reactions, which is helpful to promote the outcome of the disease. [ABSTRACT FROM AUTHOR]

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The composition of matte is relatively complex, if the content of noble metals is directly determined by inductively coupled plasma atomic emission spectrometry after acid dissolution, the content of impurity elements is too high, the interference is serious, leading to the large deviation of results. In this experiment, the lead assay method was first used to remove most of the impurity elements in the matte sample in a high-temperature molten state to enrich the precious metal into the lead buckle, and then the lead was removed from the lead buckle to obtain the precious metal particles after ash blowing. The results were corrected using second assay, the combined particles were dissolved in nitric acid to separate gold from other elements, and the mass of the gold particles was weighed, added an appropriate amount of hydrochloric acid solution to the gold separation solution and continued heating treatment, and then the concentrations of gold, lead, bismuth, copper, and palladium in the gold separation solution were measured by inductively coupled plasma atomic emission spectrometer under selected optimal instrument operating conditions. The contents of gold, silver, and palladium in the matte sample were calculated using the given formula. The effects of lead oxide dosage, ash blowing temperature and matrix interference on the determination results were discussed. When the amount of lead oxide added was 200 g and the ash blowing temperature was 890 °C, the test results were the best. The interference test showed that the high or low content of silver in the sample would not affect the determination of Au, Pb, Bi, Cu, and Pd. The test results showed that the recovery of silver was 97. 7%--100%, the recovery of gold was 98. 6%--102%, and the recovery of palladium was 98.0%--102%. this method was easy to operate, and had good accuracy and precision the RSD values were between 1. 1% and 3. 3%, and could meet the needs of actual detection. [ABSTRACT FROM AUTHOR]

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Geology & Exploration is the property of Geology & Exploration Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of High Pressure Physics is the property of Chinese Journal of High Pressure Physics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The acid leaching residue after leaching copper and zinc from copper soot was used as raw material. The bismuth in acid leaching residue was leached by NaCl-H2SO4 solution and bismuth oxychloride was prepared. The effects of time, sulfuric acid addition, liquid-to-solid ratio, temperature, and NaCl concentration on the leaching rates of bismuth were examined. The results demonstrate that the concentration of NaCl, the amount of sulfuric acid, the duration of time, and the liquid-to-solid ratio all have a substantial effect on the rate of bismuth leaching. The rate of bismuth leaching increases with increasing NaCl concentration, sulfuric acid content, and liquid-to-solid ratio, in that order. It increases first and then decreases as leaching time increases, and the change with leaching temperature is not obvious. The leaching rate of Bi is above 99% under optimal conditions of NaCl concentration 300 g/L, 3 times theoretical sulfuric acid addition, leaching period 2 h, temperature 60 °C, and liquid-to-solid ratio 4:1, and more than 99% of lead and tin enter the leaching residue. Bismuth oxychloride with purity above 99% and uniform morphology can be obtained by hydrolysis of bismuth-containing leaching solution at 70-90 °C and pH 2.5-3.0 for 0.5 h. The synergistic leaching process of NaCl-H2SO4 solution from acid leaching residue of copper soot is efficient and convenient, and the results can provide a reference for recovery of bismuth. [ABSTRACT FROM AUTHOR]

Using sodium thiosulfate pentahydrate (Na2 S2 O3 ⋅ 5H2 O), bismuth nitrate pentahydrate (BiN3 O9 ⋅ 5H2 O) as sulfur source and bismuth source, and urea (CON2 H4) as structure guide agent, bismuth sulfide (Bi2 S3) with nanorod structure was prepared. It was grown in situ on the cage-like surface of MIL-125(Ti). PEC performance test shows that in 0.5 mol⋅L-1 sodium sulfate electrolyte (pH =6.0), Bi2 S3/MIL-125(Ti)0.07 (the addition amount of MIL-125(Ti) is 0.07 g) composite has the highest photoelectric property. The significant enhancement of photoelectric property mainly depends on the bandgap reforming effect of Bi2 S3/MIL-125 composite, which significantly improves the absorption capacity of ultraviolet light and visible light. However, due to the slow electron transfer between Bi2 S3/MIL-125 photoelectrode and electrolyte interface, in order to improve the interface charge transfer kinetic performance of Bi2 S3/MIL-125 photoelectrode, Ag NPs was introduced by thermal reduction method to modify the Bi2 S3/MIL-125 photoelectrode. The Ag-Bi2 S3/MIL-125 photoelectrode was prepared to accelerate the electron transfer between interfaces. In the range from - 0. 5 V to - 0. 8 V (versus Ag/AgCl), maximum saturation photocurrent of Bi2 S3/MIL-125 (Ti)0. 07 (- 0. 90 mA ⋅ cm-2) is about 1. 5 times of unmodified Bi2 S3 (-0. 61 mA⋅cm-2), and maximum saturation photocurrent of Ag-Bi2 S3/MIL-125(Ti)0.07 (-1. 87 mA⋅ cm-2) is about 3.1 times of unmodified Bi2 S3 (-0. 61 mA⋅cm-2). [ABSTRACT FROM AUTHOR]

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Huangshaping-Baoshan ore field is located in the Qianlishan-Qitianling ore concentration area in southern Hunan. The structure in the ore field is multi-period, and the ore body output is obviously controlled by the structure. In previous studies on the structure of this area, there is a lack of numerical simulation of the tectonic stress field for the process of tectonic deformation and its rock-controlling and ore-controlling processes. Therefore, based on the previous research results, this paper analyzes the typical geological structure points of the ore field in detail and further improves the stress state of the ore field structure system and the main tectonic period. Using ANSYS finite element numerical simulation software, this paper discusses the distribution characteristics and evolution of the tectonic stress field in the pre-mineralization stage and ore-forming stage of the ore field and summarizes the characteristics of tectonic deformation and the law of tectonic stress field controlling rock and ore control. It is considered that the near SN trending compression-torsional fracture is formed by regional SN compression before mineralization, and the KW-trending fracture shows obvious low strain energy, which provides favorable conditions for subsequent magmatic emplacement. The dominant position of the maximum principal stress in the ore-forming stage changed to the NE direction, and the maximum shear stress intensity was large, indicating that the deformation was strong in this period, and the pre-existing structure was strongly reformed. At this time, the KW-trending strain energy low-value fault zone was a powerful channel for magmatic emplacement and was limited by the NE-trending strain energy high-value fault zone in the periphery of the mining area, so that it could continuously gather and precipitate mineralization in the low strain energy area. Finally, through the comparative study of structural stress field characteristics of known ore points, it provides the basis for prospecting direction in this area. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND Currently, tungsten, molybdenum, and bismuth contents are mainly determined by the traditional potassium thiocyanate colorimetric method and EDTA volumetric method. These methods are based on single-element analysis, which has a complicated operation process, low analysis efficiency, and long detection cycle. It is difficult to meet the requirements of accurate and rapid determination of many samples. OBJECTIVES To improve the traditional single-element analysis method for the determination of tungsten, molybdenum, and bismuth in polymetallic ore. METHODS A rapid method for the simultaneous determination of tungsten, molybdenum, and bismuth in the ore sample was developed by comparing the two digestion methods of HCl-H3PO4-HClO4-HNO3 and HCl-HClO4-HNO3, and was subsequently combined with inductively coupled plasma-optical emission spectrometry. RESULTS Tungsten, molybdenum, and bismuth in the sample were digested more thoroughly using the four-acid digestion method with a reasonable addition of phosphoric acid. The relative error between the determined and certified values of each element ranged from -5.36% to -1.39%, which indicated higher accuracy. The relative standard deviation was ≤ 4.18%, and the detection limits of the method ranged from 0.0027% to 0.0037%. The method was employed for the analysis of actual samples of the polymetallic ore from a certain area in Chenzhou, Hunan Province. The recovery of each element ranged from 95.0% to 103.0%. All the technical indexes were better than those of the three-acid digestion method. CONCLUSIONS The developed method significantly improved the analysis efficiency and gave accurate and reliable results. The method has been verified by actual samples and is suitable for batch detection of tungsten, molybdenum, bismuth, and other major and trace elements in the polymetallic ore samples.

Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Precious Metals / Guijinshu is the property of Precious Metals Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

High temperature chemical extract method can be used to separate 209Bi and 210Po in bismuth target after reactor irradiated. Two kinds of metal bismuth targets are designed. The MNCP program is used to simulate the neutron flux and nuclear heating in the CARR reactor, and the heat transfer of the two targets is calculated theoretically. The metal bismuth target is welded by argon, and the tightness of the welded target is checked. The results show that the maximum neutron flux rate of the two kinds of targets at the full power of 60 MW in the CARR reactor is 5.21×1014 n/cm2·s, the total heat output of the target is 1 707 W and 2 220 W respectively, and the center temperature of the targets is 163.5 ℃ and 191.8 ℃ respectively after heat transfer calculation, which is lower than the melting point of bismuth (271.3 ℃). The leakage rate of the welded target is less than 3.2×10-9 Pa·m3/s. Bismuth target can be used for the preparation of 210Po nuclide by CARR reactor irradiation.

Bismuth is widely used in advanced nuclear reactors such as lead-bismuth eutectic (LBE) fast reactors, space reactors and so on. Its neutron nuclear data, especially the inelastic scattering cross sections have significant impact on safety and economics of these nuclear facilities. A facility for measurement of neutron reaction cross sections using prompt γ ray method based on the HI13 tandem accelerator was established at China Institute of Atomic Energy (CIAE). Neutrons were produced using a D2 gas target bombarded with deuterons at 65, 80 and 95 MeV. The neutron target was positioned in the center of a shielding in size of 2 m×2 m×2 m composed of concrete, iron, lead and borated polyethylene. Neutrons were extracted at 0° with respect to the deuteron beam through a collimator made of copper, iron, polyethylene and lead. Neutron inelastic scattering cross sections at 90, 105 and 120 MeV were measured experimentally for 209Bi with a 209Bi sample in size of 50 mm×4 mm. A natural titanium sample in size of 50 mm×1 mm was used as the reference sample. By measuring production cross sections of the 983.5 keV γ rays produced when neutrons scattered inelastically off 48Ti nuclei, a normalization factor can be determined. 4 Clover detectors were used to measure produced γ rays. They were placed at 30°, 70°, 110° and 150° with respect to the deuteron beam. Lead shielding in thickness of approximately 2 cm was used for detector head to shield scattered γ rays. Timeofflight method was used to determine neutron energy, thus neutrons produced by DD breakup could be discriminated with neutrons produced by DD fusion. The energy and absolute efficiency were calibrated using 152Eu, 60Co, 22Na and 133Ba standard γ sources with known radioactive activities. A 508 cm×508 cm liquid scintillation detector was positioned at the end of neutron beam line to monitor the neutron fluxes passing through the samples. Two specific measurement angles at 110° and 150° were selected to obtain angleintegrated γ production cross sections by performing a simple linear summation of the partial cross sections measured at these angles. Talys 195 code was used to calculate ratios of γ production cross sections and total inelastic scattering cross sections. The experiment results were compared with other experiment data, data retrieved from ENDF/BⅧ0, JEFF33, JENDL40, ROSFOND2010 and CENDL31 evaluated nuclear data libraries as well as calculation by Talys 195 code with the default parameters. The results show that the tendency of these 3 measured energy points is similar to these results. For cross sections measured at 90 and 105 MeV, the results are closer to data calculated with Talys 195 code. For cross section measured at 120 MeV, it fits the ROSFOND2010 evaluated data better.

Crude tellurium dioxide is an important raw material for tellurium refining or tellurium chemical production, in which the accurate determination of coexisting elements copper, lead, arsenic, antimony, bismuth and selenium is of great significance for production process quality control and trade settlement. However, there is no standard analytical method for the determination of copper, lead, arsenic, antimony, bismuth and selenium in crude tellurium dioxide. The samples were decomposed by aqua regia and saturated ammonium hydrogen fluoride. Cu 327. 393 nm, Pb 220. 353 nm, Sb 217. 582 nm, Bi 223. 061 nm, As 193.696 nm and Se 196.026 nm were selected as analytical lines. The contents of copper, lead, antimony, bismuth, arsenic and selenium in crude tellurium dioxide were determined by inductively coupled plasma atonic emission spectrometry (ICP-AES) in the medium of aqua regia and tartaric acid. The correlation coefficients of the calibration curves of elements were all higher than 0. 999. The limits of detection of copper, lead, antimony, bismuth, arsenic and selenium were 0.0004%, 0.0005%, 0.0006%, 0. 0007%, 0.0004% and 0.0007%, respectively. The limits of quantification were 0.0012%, 0.0016%, 0.0020%, 0.0025%, 0.0013% and 0.0025%, respectively. The contents of copper, lead, antimony, bismuth, arsenic and selenium in live crude tellurium dioxide samples were determined according to the proposed method. The relative standard deviations (RSD, n = 7) of the results were between 0. 79% and 4. 8%, and the recoveries were between 96. 0% and 103%. The method is simple with high precision and accuracy, which can be used as a method of determination copper, lead, arsenic, antimony, bismuth and selenium in crude tellurium dioxide. [ABSTRACT FROM AUTHOR]

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Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Precious Metals / Guijinshu is the property of Precious Metals Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Precious Metals / Guijinshu is the property of Precious Metals Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Currently, tungsten, molybdenum, and bismuth contents are mainly determined by the traditional potassium thiocyanate colorimetric method and EDTA volumetric method. These methods are based on single-element analysis, which has a complicated operation process, low analysis efficiency, and long detection cycle. It is difficult to meet the requirements of accurate and rapid determination of many samples. OBJECTIVES: To improve the traditional single - element analysis method for the determination of tungsten, molybdenum, and bismuth in polymetallic ore. METHODS: A rapid method for the simultaneous determination of tungsten, molybdenum, and bismuth in the ore sample was developed by comparing the two digestion methods of HCl - H3P04 - HCl04 - HN03 and HCl - HCl04 - HN03 and was subsequently combined with inductively coupled plasma - optical emission spectrometry. RESULTS: Tungsten, molybdenum, and bismuth in the sample were digested more thoroughly using the four acid digestion method with a reasonable addition of phosphoric acid. The relative error between the determined and certified values of each element ranged from -5.36% to -1.39%, which indicated higher accuracy. The relative standard deviation was <4.18%, and the detection limits of the method ranged from 0.0027% to 0.0037%. The I method was employed for the analysis of actual samples of the polymetallic ore from a certain area in Chenzhou, Hunan Province. The recovery of each element ranged from 95.0% to 103.0%. All the technical indexes were better than those of the three-acid digestion method. CONCLUSIONS: The developed method significantly improved the analysis efficiency and gave accurate and reliable results. The method has been verified by actual samples and is suitable for batch detection of tungsten, molybdenum, bismuth, and other major and trace elements in the polymetallic ore samples. [ABSTRACT FROM AUTHOR]

In order to solve the problems of incomplete separation of arsenic, antimony and bismuth and low recovery rate of valuable elements in the traditional separation process of antimony and bismuth, the leachate from high antimony smearing slag containing bismuth was treated by reducing precipitation of arsenic, hydrolytic precipitation of antimony, neutralization dechlorinating and neutralization and precipitation of bismuth, respectively. The temperature and reaction time were investigated and analyzed. The results show that arsenate can be reduced to arsenic by adding sodium hypophosphite under the optimum conditions. Finally, arsenic was recovered in the form of arsernc oxide, and the recovery rate reached 91. 99%. After arsenic precipitation, water was added to the solution for hydrolytic precipitation, and antimony was precipitated in the form of SbOCl, and the precipitation rate was about 95%. SbOCl is added to ammonia for chlorine removal,antimony is precipitated and separated in the form of antimony oxide and the chlorine removal rate reaches 96%. After antimony precipitation, a certain amount of Ammonia water is added to neutralize bismuth, bismuth is separated in the form of Boil precipitation, and the precipitation rate of bismuth is controlled at about 99%. Thus the cascade separation and recovery of arsenic, antimony and bismuth were realized. [ABSTRACT FROM AUTHOR]

The influence of oxygen, temperature, and Bi on the morphology of MnS inclusions in free-cutting steel was studied using thermal experiments, chemical analysis, scanning electron microscopy (SEM) research, and thermodynamic calculations.The results show that high oxygen content, high temperature heating, and Bi can effectively reduce the aspect ratio of inclusions in steel and improve the proportion of large particle size inclusion.Statistical analysis reveals that the aspect ratio of MnS inclusions reduce when the total oxygen content becomes higher.The aspect ratio of inclusions increases as the area of a single inclusion in as-cast steel or rolled wire increases.With the increase of the heat treatment temperature, large particle inclusions were found in samples, and the contour of inclusions became clearer.The aspect ratio of inclusions with an area of 0-5μm2became less than 2.0 after 900℃and1200℃heating, which was lower than the aspect ratio before heat treatment by 43%.Thermal experiments reveal that in S-Bi freecutting steel with total oxygen (TO) content of 2.2×10-5and Bi content of 0.0010%, the aspect ratio of inclusions with area of 0-5μm2is less than 1.6, which is 20%lower than that after 900℃and 1200℃heat treatment.

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Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)