17 results on '"Meng, Xiaorong"'
Search Results
2. Study of electric field-enhanced mass transfer and Li/Mg separation of N, N-bis (1-methylheptyl) acetamide/TBP-NaFeCl4 composite membrane.
- Author
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Meng, Xiaorong, Sun, Chi, Liu, Xingfan, Huang, Jingyang, Li, Lu, and Ma, Xiaopeng
- Subjects
COMPOSITE membranes (Chemistry) ,ELECTRIC fields ,CONTACT angle ,POLYMERIC membranes ,PERMEABILITY - Abstract
Using N,N-bis(1-methylheptyl)acetamide (N503) synergized with TBP-NaFeCl 4 (T Fe), a ternary composite extraction membrane known as T Fe N-PIM was created. Under optimum membrane phase conditions, the mass transfer properties of T Fe N-PIM-Li(Ⅰ) and its Li/Mg selective separation performance by electric field augmentation were examined, and confirmed the mechanism of T Fe N-PIM-Li(Ⅰ) electric field enhanced mass transfer. The findings demonstrate a homogeneous distribution of [FeCl 4
- ] in the T Fe N-PIM membrane phase and a decrease in the water contact angle as the T Fe content increases. In the T Fe N-PIM membrane, the cation binding order of the composite carrier was H+ >Li+ >Na+ >Mg2+ , and the mass transfer was carried out at the interface of the two phases of the membrane through the mechanism of "cation exchange-neutralization", in which Li(Ⅰ) was bonded with the carrier in the form of 2N503-LiFeCl 4 -2TBP, and showed a fixed-site "hopping" mass transfer characteristics under the reinforcement of electric field. The mass transfer process of the T Fe N-PIM- Li(Ⅰ) system under electric field enhancement conforms to the first-order kinetic rate equation, and the voltage (5–45 V) is positively correlated with the permeability coefficient P Li(Ⅰ) but decreases the Li/Mg selectivity of T Fe N-PIM. The S Li(Ⅰ)/Mg(Ⅱ) of T Fe N-PIM was 9.18 at 3 V. After three cycles of 72 h cycling at 40 V, the decrease rate of P Li(Ⅰ) was <7.42 %, which showed good stability. [Display omitted] • A ternary composite extraction membrane (T Fe N-PIM) of N503 synergy with TBP-NaFeCl 4 (T Fe) was prepared. • The increase in permeability coefficient stabilization after T Fe /N503 > 2/1 (w/w) in T Fe N-PIM. • Voltage accelerates the "ion hopping" rate of Li(Ⅰ) in T Fe N-PIM. • Voltage positively correlates with permeability coefficient but reduces Li/Mg selectivity of T Fe N-PIM. • The separation factor of T Fe N-PIM for Li/Mg at 3 V was 9.18. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
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3. Magnetic-Field-Induced Vapor-Phase Polymerization to Achieve PEDOT-Decorated Porous Fe3O4 Particles as Excellent Microwave Absorbers.
- Author
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Qiao, Mingtao, Tian, Yurui, Wang, Jiani, Li, Xiang, He, Xiaowei, Lei, Xingfeng, Zhang, Qiuyu, Ma, Mingliang, and Meng, Xiaorong
- Published
- 2022
- Full Text
- View/download PDF
4. Study of electric field-enhanced mass transfer and Li/Mg separation of N, N-bis (1-methylheptyl) acetamide/TBP-NaFeCl4composite membrane
- Author
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Meng, Xiaorong, Sun, Chi, Liu, Xingfan, Huang, Jingyang, Li, Lu, and Ma, Xiaopeng
- Abstract
Using N,N-bis(1-methylheptyl)acetamide (N503) synergized with TBP-NaFeCl4(TFe), a ternary composite extraction membrane known as TFeN-PIM was created. Under optimum membrane phase conditions, the mass transfer properties of TFeN-PIM-Li(Ⅰ) and its Li/Mg selective separation performance by electric field augmentation were examined, and confirmed the mechanism of TFeN-PIM-Li(Ⅰ) electric field enhanced mass transfer. The findings demonstrate a homogeneous distribution of [FeCl4-] in the TFeN-PIM membrane phase and a decrease in the water contact angle as the TFecontent increases. In the TFeN-PIM membrane, the cation binding order of the composite carrier was H+>Li+>Na+>Mg2+, and the mass transfer was carried out at the interface of the two phases of the membrane through the mechanism of "cation exchange-neutralization", in which Li(Ⅰ) was bonded with the carrier in the form of 2N503-LiFeCl4-2TBP, and showed a fixed-site "hopping" mass transfer characteristics under the reinforcement of electric field. The mass transfer process of the TFeN-PIM- Li(Ⅰ) system under electric field enhancement conforms to the first-order kinetic rate equation, and the voltage (5–45 V) is positively correlated with the permeability coefficient PLi(Ⅰ)but decreases the Li/Mg selectivity of TFeN-PIM. The SLi(Ⅰ)/Mg(Ⅱ)of TFeN-PIM was 9.18 at 3 V. After three cycles of 72 h cycling at 40 V, the decrease rate of PLi(Ⅰ)was <7.42 %, which showed good stability.
- Published
- 2024
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5. Magnetic-Field-Induced Vapor-Phase Polymerization to Achieve PEDOT-Decorated Porous Fe3O4Particles as Excellent Microwave Absorbers
- Author
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Qiao, Mingtao, Tian, Yurui, Wang, Jiani, Li, Xiang, He, Xiaowei, Lei, Xingfeng, Zhang, Qiuyu, Ma, Mingliang, and Meng, Xiaorong
- Abstract
Poly(3,4-ethylenedioxythiophene) (PEDOT) is widely used in several fields because of its excellent conductivity, strong adhesion, easy synthesis, and good flexibility. However, liquid-phase polymerization often encounters vast organic solvents and complex postprocessing, while vapor-phase polymerization suffers from agglomeration of precursors. Interestingly, when an external magnetic field was carried out and adjusted, numerous magnetic particles were assembled into different arrangements, which could effectively overcome particles’ agglomeration. Herein, magnetic-field-induced vapor-phase polymerization has been explored to make nanoscale PEDOT layers decorate porous Fe3O4particles. Tailoring the magnetic field forces can control the PEDOT loading mass together with their doped levels. Then, the absorption performance of electromagnetic waves of PEDOT-decorated porous Fe3O4particles was optimized by changing the PEDOT loadings and doped levels. Results indicate that the minimum reflection loss value can reach −43.4 dB (14.0 GHz) and the maximum effective absorption bandwidth can extend to 6.49 GHz, which is broader than that of similar absorbers. Related electromagnetic parameters reveal that dielectric loss mechanisms mainly include conductive loss from PEDOT layers, interfacial polarizations from Fe3O4–PEDOT and PEDOT–air/paraffin interfaces, dipole polarizations between doped counterpart anions and positive sulfur ions in the PEDOT skeletons, and relaxation loss. Besides, multiple reflections among numerous particles, abundant scatterings in the porous structures, and magnetic loss involving natural resonance, exchange resonance, and eddy current effect also account for the electromagnetic energy attenuation. Magnetic-field-induced vapor-phase polymerization is a novel and effective method for preparing PEDOT-decorated magnetic materials.
- Published
- 2022
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6. Preparation of Z-type Cu2SnS3/g-C3N4 heterojunction material and its synergistic photocatalytic performance with H2O2.
- Author
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Zhang, Zhi, Meng, Xiaorong, Wang, Chenbo, and Wan, Jialin
- Subjects
HETEROJUNCTIONS ,VISIBLE spectra ,LIGHT absorption ,METHYLENE blue ,PHOTODEGRADATION ,COPPER - Abstract
Due to poor visible light responsiveness and easy recombination of photo generated carriers, the photocatalytic performance of a single g-C 3 N 4 is limited. This article presents a Z-type Cu 2 SnS 3 /g-C 3 N 4 (CTS/CN) heterojunction photocatalyst prepared by in-situ growth of CTS on the surface of g-C 3 N 4 using a simple solvothermal method. Through SEM results, it can be seen that as the content of g-C 3 N 4 increases, the nanosheet gaps of flower shaped microspheres on the surface of CTS/CN increase and the size becomes thinner. The UV–vis DRS experiment showed that the introduction of CTS increased the visible light absorption range of CTS/CN composite and improved its visible light absorption ability.Under the synergistic effect of H 2 O 2 , the photocatalytic degradation efficiency of CTS/70% CN towards MO reached 99% at 50 minutes,At the same time, the degradation rate constants k of methylene blue (MB), ciprofloxacin (CIP) and levofloxacin (LEV) reached 0.06289 min
−1 , 0.02132 min−1 and 0.02787 min−1 respectively at 100 min.In the synergistic MO system of H 2 O 2 for photocatalytic degradation, free radical capture experiments showed that the main active species were h+ and • OH. Combined with the band structure of Cu 2 SnS 3 and g-C 3 N 4 , a Z-type photocatalytic mechanism was proposed. Under visible light, H 2 O 2 rapidly captured the photo generated electrons of CTS/CN, promoting the transport of photo generated carriers. This study provides theoretical guidance for the design and construction of Z-type heterojunctions with superior visible light driven photocatalytic performance. [Display omitted] • In situ growth of CTS on the surface of g-C 3 N 4 to obtain a Z-type binary heterojunction (CTS/CN). • The nanosheets of flower shaped microspheres on the surface of CTS/CN increase in gap size with the increase of g-C 3 N 4 content. • The introduction of CTS increases the visible light absorption range of CTS/CN composite. • H 2 O 2 quickly captures the photogenerated electrons of CTS/CN, promoting the transport of photogenerated carriers. • H+ and •OH are the main active substances in the photocatalytic degradation process. [ABSTRACT FROM AUTHOR]- Published
- 2024
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7. Study on stable mass transfer and enrichment of phenol by 1-octanol/kerosene/polyvinyl chloride polymer inclusion membrane.
- Author
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Meng, Xiaorong, Song, Yingying, Lv, Yongtao, Xin, Xiaoqiang, Ren, Tingting, and Wang, Xudong
- Subjects
MASS transfer ,POLYMERIC membranes ,POLYVINYL chloride ,PHENOL ,POLLUTION prevention ,VEGETABLE oils - Abstract
A polymer inclusion membrane (PIM) that contains a polyvinyl chloride (PVC) polymer matrix and 1-octanol (OCT) as specific carrier (PO-PIM) was prepared to investigate the mass transfer behaviour of phenol in aqueous solutions. Results showed that the mass transfer behaviour of the PO-PIM for phenol conformed to the first-order kinetics. In addition, the mass transfer efficiency for phenol reached the maximum when the OCT content was 82.8 wt%. The mass transfer activation energy (E a) was 14.46 kJ mol
−1 , which indicated that intramembranous diffusion was the main controlling factor in the mass transfer process. The introduction of hydrophobic additives, such as kerosene, liquid paraffin and vegetable oil, into the PO-PIM could remarkably improve its stability. In an aqueous solutions of phenol ranging from 0 mg L−1 to 9000 mg L−1 , the initial flux (J 0) of kerosene/PVC/OCT-PIM (KPO-PIM) was positively correlated with the initial concentration of phenol. For a stripping solution with a feed solution pH of 2.0 and a sodium hydroxide concentration of 0.1 mol L−1 , the maximum permeability coefficient during stable mass transfer reached 12.55 μm s−1 . At a mass transfer area of 3.14 cm2 , an enrichment factor (EF) of 3.5 for 200 mg L−1 of phenolic aqueous solution was achieved within 48 h through KPO-PIM. Image 1 • Optimal conditions of mass transfer by PO-PIM were confirmed. • Effects of hydrophobic additives on the stability of PO-PIM were evaluated. • Kerosene content in PO-PIM was optimised. • Mass transfer mechanism of PO-PIM for phenol was proposed. • Enrichment of low-concentration phenol by KPO-PIM was confirmed. This study may provide a clean, economical and convenient method for the prevention of phenol pollution. [ABSTRACT FROM AUTHOR]- Published
- 2019
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8. Modulation of Interfacial Characteristics of Copper Electrode by Electrodeposited Cu@Ti for High-Performance Anode-Free Zinc Ion Batteries
- Author
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Jing, Yue, Meng, Xiaorong, Chen, Lijun, Yuan, Changqing, and Wei, Haohao
- Abstract
Preparation of the NC-Cu@Ti electrode involved electrochemical deposition of nanocrystalline copper on the surface of titanium foil using a constant potential method, intended for high stability anode-free zinc ion battery (ZIB) anode material applications. This paper examines the effect of Cu2+concentration in the electrodeposition solution on the structure and morphology of copper crystals on the NC-Cu@Ti electrode surface. The study also assesses how the interfacial properties of the NC-Cu@Ti electrode affect the process of anodic zinc deposition without anodic ZIBs. Our data suggest that with a voltage setting of −0.95 V and a copper ion concentration of 0.5 M in the solution, the deposition rate of copper crystals on the NC-Cu@Ti-0.5 electrode remains consistent. The resultant crystal phase surface appears smooth with a fine grain size. The NC-Cu@Ti-0.5 electrodes have increased hydrogen potentials and superior corrosion resistance; noting zinc nucleation sites at a mere 21.4 mV, it can provide stable electrochemical conditions for the zinc deposition interface of ZIBs and accelerate the process of zinc desolvation and nucleation. The constructed Zn//NC-Cu@Ti-0.5 asymmetric cell displays swift zinc deposition/stripping kinetics, elevated Coulombic efficiency, and prolonged stability (maintaining nearly 99% after 200 cycles). This performance significantly extends the service life relative to the Zn//Zn symmetric cell, which operates stably for 400 h at 1 mA/cm2. Moreover, the NC-Cu@Ti-0.5//MnO2ZIBs offer enhanced conductivity and magnification performance to the pure zinc anode ZIBs. This study presents a novel approach for the low-cost and rapid preparation of anode materials for high-performance free-anode ZIBs.
- Published
- 2024
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- View/download PDF
9. Preparation of Z-type Cu2SnS3/g-C3N4heterojunction material and its synergistic photocatalytic performance with H2O2
- Author
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Zhang, Zhi, Meng, Xiaorong, Wang, Chenbo, and Wan, Jialin
- Abstract
Due to poor visible light responsiveness and easy recombination of photo generated carriers, the photocatalytic performance of a single g-C3N4is limited. This article presents a Z-type Cu2SnS3/g-C3N4(CTS/CN) heterojunction photocatalyst prepared by in-situ growth of CTS on the surface of g-C3N4using a simple solvothermal method. Through SEM results, it can be seen that as the content of g-C3N4increases, the nanosheet gaps of flower shaped microspheres on the surface of CTS/CN increase and the size becomes thinner. The UV-vis DRS experiment showed that the introduction of CTS increased the visible light absorption range of CTS/CN composite and improved its visible light absorption ability.Under the synergistic effect of H2O2, the photocatalytic degradation efficiency of CTS/70% CN towards MO reached 99% at 50minutes,At the same time, the degradation rate constants k of methylene blue (MB), ciprofloxacin (CIP) and levofloxacin (LEV) reached 0.06289min-1, 0.02132min-1and 0.02787min-1respectively at 100min.In the synergistic MO system of H2O2for photocatalytic degradation, free radical capture experiments showed that the main active species were h+and • OH. Combined with the band structure of Cu2SnS3and g-C3N4, a Z-type photocatalytic mechanism was proposed. Under visible light, H2O2rapidly captured the photo generated electrons of CTS/CN, promoting the transport of photo generated carriers. This study provides theoretical guidance for the design and construction of Z-type heterojunctions with superior visible light driven photocatalytic performance.
- Published
- 2024
- Full Text
- View/download PDF
10. Bifunctional photocatalytic nanofiltration membranes with immobilized BaTiO3/Ti3C2Tx catalysts for the simultaneous separation and degradation of azo compounds.
- Author
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Zheng, Huiqi, Meng, Xiaorong, Yang, Yingzi, Chen, Jin, and Huo, Shanshan
- Subjects
AZO compounds ,COMPOSITE membranes (Chemistry) ,POLYVINYLIDENE fluoride ,NANOFILTRATION ,PHOTODEGRADATION ,DIMETHYLAMINOAZOBENZENE ,RADICALS (Chemistry) - Abstract
Bifunctional photocatalytic nanofiltration (NF) membranes are becoming increasingly popular because of their ability to separate and degrade azo compounds (azos) in water. However, several serious drawbacks limit their practical implementation. In this study, a polyamide (PA) layer formed by interfacial polymerization on the polyvinylidene fluoride membrane surface and polydopamine (PDA) were combined with BaTiO 3 /Ti 3 C 2 T x (BT) nanoparticles to prepare photocatalytic BT@PDA (BTPP) membranes, which integrated physical separation and photocatalytic degradation into a single process. By optimizing synthesis conditions, a BTPP membrane with high water permeability (34.0 L·m
–2 ·h–1 ·bar–1 ) and Na 2 SO 4 rejection rate (94.7%) was produced. The photocatalytic activity of this membrane was examined by studying the photocatalytic degradation efficiency of several azos. After 180 min of irradiation with a 300 W Xe lamp (λ ≥ 420 nm), the degradation rate of methyl orange (MO) reached 95.3%, while the degradation rates of alizarin yellow GG and methyl red were 92.7% and 83.5%, respectively. The photocatalytic performance of the BTPP membranes for azos degradation was verified by studying the charge transfer process and generation of reactive radical species (·OH and·O 2– ), and possible structures of the main intermediates formed during MO degradation were identified. This work provides new insights into the synthesis and degradation properties of bifunctional photocatalytic NF membranes. [Display omitted] • BaTiO 3 /Ti 3 C2T x (BT) structure with good photocatalytic properties. • Bifunctional photocatalytic BT@dopamine (BTPP) membranes with excellent performance is proposed. • BTPP membranes promote the simultaneous separation and photodegradation of azo compounds. • The degradation of azo compounds by BTPP membranes include ·OH and ·O 2– active radicals. [ABSTRACT FROM AUTHOR]- Published
- 2023
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11. Transport and selectivity of indium through polymer inclusion membrane in hydrochloric acid medium
- Author
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Meng, Xiaorong, Wang, Conghui, Zhou, Pan, Xin, Xiaoqiang, and Wang, Lei
- Abstract
In the present paper, a polymer inclusion membrane (PIM) containing polyvinyl chloride (PVC), and bis-(2-ethylhexyl) phosphate (D2EHPA) which was used as extracting agent was used for the recovery of In(III) ions in hydrochloric acid medium. The effects of carrier concentration, feed phase pH, strip phase HCl concentration, temperature on the transport, and the membrane’s stability and thickness were examined. And the conditions for the selective separation of In(III) and Cu(II) were optimized. The results showed that the transport of In(III) across PIM was consistent with the first order kinetics equation, and also it was controlled by both the diffusion of the metal complex in the membrane and the chemical reaction at the interface of the boundary layers. The transport flux (J0) was inversely proportional to the membrane thickness, however, the transport stability improved as the membrane thickness increased. The transport flux of In(III) and Cu(II) was decreased by excessive acidity of feed phase and high concentration of Cl–. The selectivity separation coefficient of In(III)/Cu(II) was up to 34.33 when the original concentration of both In(III) and Cu(II) was 80 mg∙L–1as well as the pH of the feed phase and the concentration of Cl–in the adjusting context were0.6 and 0.5 mol∙L–1, respectively.Within the range of pH = 1–3, the separation selectivity of In(III)/Cu(II) reached the peak in the case when the Cl–concentration was 0.7 mol∙L–1.
- Published
- 2017
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12. Bifunctional photocatalytic nanofiltration membranes with immobilized BaTiO3/Ti3C2Txcatalysts for the simultaneous separation and degradation of azo compounds
- Author
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Zheng, Huiqi, Meng, Xiaorong, Yang, Yingzi, Chen, Jin, and Huo, Shanshan
- Abstract
Bifunctional photocatalytic nanofiltration (NF) membranes are becoming increasingly popular because of their ability to separate and degrade azo compounds (azos) in water. However, several serious drawbacks limit their practical implementation. In this study, a polyamide (PA) layer formed by interfacial polymerization on the polyvinylidene fluoride membrane surface and polydopamine (PDA) were combined with BaTiO3/Ti3C2Tx(BT) nanoparticles to prepare photocatalytic BT@PDA (BTPP) membranes, which integrated physical separation and photocatalytic degradation into a single process. By optimizing synthesis conditions, a BTPP membrane with high water permeability (34.0 L·m–2·h–1·bar–1) and Na2SO4rejection rate (94.7%) was produced. The photocatalytic activity of this membrane was examined by studying the photocatalytic degradation efficiency of several azos. After 180 min of irradiation with a 300 W Xe lamp (λ ≥ 420 nm), the degradation rate of methyl orange (MO) reached 95.3%, while the degradation rates of alizarin yellow GG and methyl red were 92.7% and 83.5%, respectively. The photocatalytic performance of the BTPP membranes for azos degradation was verified by studying the charge transfer process and generation of reactive radical species (·OH and·O2–), and possible structures of the main intermediates formed during MO degradation were identified. This work provides new insights into the synthesis and degradation properties of bifunctional photocatalytic NF membranes.
- Published
- 2023
- Full Text
- View/download PDF
13. Effect of electrokinetic property of charged polyether sulfone membrane on bovine serum albumin fouling behavior
- Author
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Meng, Xiaorong, Huo, Shanshan, Wang, Lei, Wang, Xudong, Lv, Yongtao, Tang, Weiting, Miao, Rui, and Huang, Danxi
- Abstract
Negatively charged carboxymethylated polyethersulfone (CMPES) and positively charged quaternized polyethersulfone (QAPES) ultrafiltration (UF) membranes were prepared by bulk chemical modification and non-solvent induced phase separation method. The effects of PES membrane interfacial electrokinetic property on the bovine serum albumin (BSA) membrane fouling behavior were studied with the aid of the membrane-modified colloidal atomic force microscopy (AFM) probe. Electrokinetic test results indicated that the streaming potential (ΔE) of QAPES membrane was not consistent with its expected IECvalue, however, within the pH range of 3–10, the ζpotentials of two charged-modified PES membranes were more stable than the unmodified membrane. When pH value was 3, 4.7 or 9, the interaction behavior between charged PES membrane and BSA showed that there was significant linear correlation between the jump distance r0of membrane-BSA adhesion force (F/R) and the ζpotential absolute value. Charged modification significantly reduced the adhesion of PES membrane-BSA, and the adhesion data was good linear correlated with the flux decline rate in BSA filtration process, especially reflected in the CMPES membrane. The above experimental facts proved that the charged membrane interfacial electric double layer structure and its electrokinetic property had strong ties with the protein membrane fouling behavior.
- Published
- 2017
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14. Effect of protein on PVDF ultrafiltration membrane fouling behavior under different pH conditions: interface adhesion force and XDLVO theory analysis
- Author
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Wang, Xudong, Zhou, Miao, Meng, Xiaorong, Wang, Lei, and Huang, Danxi
- Abstract
To further determine the fouling behavior of bovine serum albumin (BSA) on different hydrophilic PVDF ultrafiltration (UF) membranes over a range of pH values, self-made atomic force microscopy (AFM) colloidal probes were used to detect the adhesion forces of membrane–BSA and BSA–BSA, respectively. Results showed that the membrane–BSA adhesion interaction was stronger than the BSA–BSA adhesion interaction, and the adhesion force between BSA–BSA-fouled PVDF/PVA membranes was similar to that between BSA–BSA-fouled PVDF/PVP membranes, which indicated that the fouling was mainly caused by the adhesion interaction between membrane and BSA. At the same pH condition, the PVDF/PVA membrane–BSA adhesion force was smaller than that of PVDF/ PVP membrane–BSA, which illustrated that the more hydrophilic the membrane was, the better antifouling ability it had. The extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory predicts that the polar or Lewis acid–base (AB) interaction played a dominant role in the interfacial free energy of membrane–BSA and BSA–BSA that can be affected by pH. For the same membrane, the pH values of a BSA solution can have a significant impact on the process of membrane fouling by changing the AB component of free energy.
- Published
- 2016
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15. Separation and enrichment of Rb(I) in dicyclohexano 18 crown 6(DCH18C6)/PVC polymer inclusion membrane assisted by electric field.
- Author
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Meng, Xiaorong, Tian, Yurui, Tang, MengYing, and Qiao, Rukai
- Subjects
ELECTRIC fields ,POLYMERIC membranes ,MASS transfer ,PERMEABILITY ,POLYVINYL chloride ,RUBIDIUM - Abstract
The effective extraction of liquid rubidium resources such as salt lake brine and seawater and the recovery of rubidium(I) at the end of the extraction process of lithium resources have always been a challenge in the industry. Two series of polymer inclusion membranes(PDA-PIM and PDT-PIM) were prepared to study the separation and enrichment of Rb(I). PDA-PIM and PDT-PIM used polyvinyl chloride (PVC) and dicyclohexano 18 crown 6(DCH18C6) as carriers, and tricaprylmethylammonium chloride (Aliquat 336) and trioctylphosphine oxide (TOPO) as a plasticizer, respectively. The optimal mass ratio (W/W) of PDA-PIM and PDT-PIM were P25D3.5A25 and P25D3.5T1, respectively. The applied electric field is a core condition for the mass transfer and separation of Rb(I). With the increase of voltage, the permeability coefficient P of Rb(I) and the separation factor (S) relative to Na(I) and K(I) increases. At 180 V, the PRb of PDA-PIM and PDT-PIM were 12.08 and 2.39 µm/s, and the SRB/NA were 11.21 and 14.44. After four mass transfer cycles of PDT-PIM, PRb only decreased by 4.6%. In addition, after 81.5 h of mass transfer, the enrichment ratio of Rb(I) was 3.02 times. These results show the excellent stability and mass transfer performance of PDT-PIM. It's of great significance for low concentration Rb(I) extraction. [Display omitted] • Separation of Rb(I), K(I) and Na(I) was realised by PIMs coupled with electric field. • PD-PIMs are composed of DC18C6/PVC and two different plasticisers. • Plasticiser improves the structure of PD-PIM and provides a mass transfer channel. • Voltage is the key factor affecting the permeability and selectivity of Rb(I). • The difference of hydration energy is the internal reason for selective separation. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
16. Emerging viruses: Cross-species transmission of coronaviruses, filoviruses, henipaviruses, and rotaviruses from bats
- Author
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Tian, Jin, Sun, Jiumeng, Li, Dongyan, Wang, Ningning, Wang, Lifang, Zhang, Chang, Meng, Xiaorong, Ji, Xiang, Suchard, Marc A., Zhang, Xu, Lai, Alexander, Su, Shuo, and Veit, Michael
- Abstract
Emerging infectious diseases, especially if caused by bat-borne viruses, significantly affect public health and the global economy. There is an urgent need to understand the mechanism of interspecies transmission, particularly to humans. Viral genetics; host factors, including polymorphisms in the receptors; and ecological, environmental, and population dynamics are major parameters to consider. Here, we describe the taxonomy, geographic distribution, and unique traits of bats associated with their importance as virus reservoirs. Then, we summarize the origin, intermediate hosts, and the current understanding of interspecies transmission of Middle East respiratory syndrome coronavirus (MERS-CoV), severe acute respiratory syndrome coronavirus (SARS-CoV), SARS-CoV-2, Nipah, Hendra, Ebola, Marburg virus, and rotaviruses. Finally, the molecular interactions of viral surface proteins with host cell receptors are examined, and a comparison of these interactions in humans, intermediate hosts, and bats is conducted. This uncovers adaptive mutations in virus spike protein that facilitate cross-species transmission and risk factors associated with the emergence of novel viruses from bats.
- Published
- 2022
- Full Text
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17. Separation and enrichment of Rb(I) in dicyclohexano 18 crown 6(DCH18C6)/PVC polymer inclusion membrane assisted by electric field
- Author
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Meng, Xiaorong, Tian, Yurui, Tang, MengYing, and Qiao, Rukai
- Abstract
The effective extraction of liquid rubidium resources such as salt lake brine and seawater and the recovery of rubidium(I) at the end of the extraction process of lithium resources have always been a challenge in the industry. Two series of polymer inclusion membranes(PDA-PIM and PDT-PIM) were prepared to study the separation and enrichment of Rb(I). PDA-PIM and PDT-PIM used polyvinyl chloride (PVC) and dicyclohexano 18 crown 6(DCH18C6) as carriers, and tricaprylmethylammonium chloride (Aliquat 336) and trioctylphosphine oxide (TOPO) as a plasticizer, respectively. The optimal mass ratio (W/W) of PDA-PIM and PDT-PIM were P25D3.5A25 and P25D3.5T1, respectively. The applied electric field is a core condition for the mass transfer and separation of Rb(I). With the increase of voltage, the permeability coefficient P of Rb(I) and the separation factor (S) relative to Na(I) and K(I) increases. At 180 V, the PRb of PDA-PIM and PDT-PIM were 12.08 and 2.39 µm/s, and the SRB/NA were 11.21 and 14.44. After four mass transfer cycles of PDT-PIM, PRb only decreased by 4.6%. In addition, after 81.5 h of mass transfer, the enrichment ratio of Rb(I) was 3.02 times. These results show the excellent stability and mass transfer performance of PDT-PIM. It's of great significance for low concentration Rb(I) extraction.
- Published
- 2021
- Full Text
- View/download PDF
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