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Objective Oil and gas fields brine contains impurities such as petroleum and suspended solids, which have potential impacts on the adsorption and separation of lithium resources. This papper studies the feasibility of lithium adsorption extraction from gas field water and the adaptability of mainstream adsorbents in the market for lithium extraction. Methods The study compared the effects of pH and temperature on the adsorption and desorption efficiency of three types of powder adsorbents: aluminium-based, titanium-based, and manganese-based adsorbents. Aluminium-based adsorbent was selected, and the effects of adsorbent morphology, brine, and brine feed flow rate on adsorption and desorption efficiency were studied, and its cycling stability was evaluated. Results Under the optimal conditions, the saturated adsorption capacities of the three adsorbents are approximately 7.9 mg/g, 12.5 mg/g and 15.3 mg/g, respectively. In this experiment, the ratio of sodium to lithium and potassium to lithium in the desorption solution of aluminum adsorbent is better than that of titanium-based and manganese-based adsorbents, and the dissolution loss rate of titanium and manganese adsorbents is 20 and 70 times that of aluminum-based adsorbent, respectively. The service life during long-term operation is significantly shorter than that of aluminum series adsorbents. The ceramic membrane was used to remove suspended solids and petroleum from brine before the lithium extraction. Under the conditions of 20 BV of brine feed, 12 BV/h of brine feed flow rate, 10 BV of desorption water volume, and 10 BV/h of desorption flow rate, the adsorption capacity of aluminum molding adsorbent, as well as the concentration of lithium in tail brine remain stable in ten consecutive cycles of single-column experiments, with an average lithium adsorption rate of 79.2%. Conclusion It is feasible to use the adsorption method to extract lithium resources from the brine of Longwangmiao gas field. [ABSTRACT FROM AUTHOR]

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.)

As the discharge standards for mine water treatment become more stringent, the requirements for effective removal of ammonia nitrogen from mine water are strongly needed. While there are several methods available for treating ammonia nitrogen in wastewater, there is relative scarcity of literature addressing the treatment of mine water specifically containing ammonia nitrogen. To address this issue, this paper conducted a comprehensive analysis of the sources and characteristics of ammonia nitrogen in mine water. It also reviewed various primary technologies used for treating low concentrations of ammonia nitrogen in wastewater, including ion exchange, adsorption, oxidation, membrane separation, and biological methods. The paper aimed to provide technical support for the treatment of ammonia nitrogen-containing mine water in China. The findings of the study reveal that ammonia nitrogen in mine water primarily originates from three sources: Naturally high ammonia nitrogen content in groundwater, the usage of emulsion, dust suppressants, grouting, and gelling materials in the underground coal production process, and the lateral recharge from polluted surface water containing ammonia nitrogen. Ammonia nitrogen-containing mine water is characterized by relatively low ammonia nitrogen content (generally

This article reviews the mechanism of Li+ de-intercalation and intercalation in manganese-based lithium ion-sieve, titanium-based lithium ion-sieven and aluminum-based adsorbent. The lithium extraction mechanism and the factors affecting the adsorption effect; some problems in lithium ion sieve materials are summarized, and the future research focus and development direction of lithium ion sieves are prospected. [ABSTRACT FROM AUTHOR]

The ocean covers 70% of the earth’s area, and the seawater uranium is more than 1000 times that of terrestrial uranium ore. In order to increase the power generation and ensure the sustainable operation of nuclear power plants, the development of unconventional uranium resources is of great significance. As an effective means to solve shortage of terrestrial uranium resources, uranium extraction from seawater has received extensive attention in recent years. At present, many methods including membrane separation, chemical deposition, solvent extraction, ion exchange, reduction and adsorption have been applied to uranium extraction from seawater. This paper focuses on the recent research progress of adsorption method used inorganic materials, organic materials, carbon materials as adsorbent, and emerging electroreduction technologies, and further discusses the challenges and opportunities of these two methods.

The development of industry has brought a large amount of CO2 emissions. In the process of achieving the goal of carbon peak and carbon neutralization, carbon dioxide capture, utilization and storage (CCUS) technology is an indispensable key technology. The carbon capture method with high technology maturity at this stage and great development potential in the future is post combustion carbon capture technology, mainly including solvent absorption, adsorption, membrane method and cryogenic distillation. The development and industrial application of the four most commonly used carbon capture methods were briefly introduced, and the industrial applicability of several methods was analyzed, especially the chemical absorption method and physical adsorption method, which are most widely used in large-scale carbon capture projects currently running. Chemical absorption method, adsorption method and membrane carbon capture technology have great development potential in the future, which can quickly promote the achievement of the goal of double carbon and help the near-zero emission of carbon.

Under the background of "carbon peaking and carbon neutrality" policy, the green and efficient wastewater treatment process has become a hotspot and has great significance for achieving carbon emission reduction. Carbonaceous functional materials stand out from all kinds of water treatment materials due to their excellent chemical stability, economic applicability, easy modification and environmental friendliness, which is expected to become a new generation of green environmental protection materials in water treatment. This review focuses on the modification principle, characteristics and application progress of carbon functional materials in the water treatment. Meanwhile, the current challenges and future development of carbonaceous functional materials was prospected, with a view to providing references for further development and application. [ABSTRACT FROM AUTHOR]

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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 Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute 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.)

Fluoride ions are widely distributed in surface rivers and groundwater bodies in China, especially in the mining areas along the Yellow River in the western Yellow River basin that there is a widespread problem of excessive fluoride in the mine water, which poses a potential threat to the local ecological environment and human health. The status quo of fluoride pollution in China is mostly at a low concentration pollution level, which leads to it difficult to remove efficiently through conventional water treatment technologies. The adsorption method is considered to be an effective way to remove low concentration fluoride ions because of its high adsorption efficiency and convenient operation. The research status of fluoride removal by commonly used adsorption materials such as carbon based, minerals, metals and metal organic frameworks (MOFs) was reviewed and summarized before summarizing the influence of different factors on the fluoride removal efficiency and adsorption mechanism of these adsorption materials. Then the application effect and operation cost of adsorption method in mine water treatment were emphatically analyzed, and the development direction of adsorption method in the treatment of low concentration (

Copyright of Power Generation Technology is the property of Power Generation Technology 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 production process of mineral resources generates a large amount of acid mine drainage, which is highly acidic, has a high sulfate content, and contains multiple heavy metal ions, easily leading to environmental pollution. In this experiment, biochar adsorption - precipitation method was used to remove heavy metal ions from acid mine drainage. The biochar was produced from corn stalk through pyrolysis at 600 °C. The study investigated its effect on copper removal from acid mine drainage and the adsorption capacity of the regenerated biochar adsorbent. Subsequently, the precipitation method was used to remove other heavy metals, and the treated wastewater met the Class I discharge standard requirements of GB 8978 - 1996 "Comprehensive Wastewater Discharge Standard". [ABSTRACT FROM AUTHOR]

Objective Under the background of global energy conservation and emission reduction and the guidance of China’s dual-carbon strategic objectives of "carbon dioxide peaking and carbon neutrality", targeted research on CO2 capture technology suitable for various working conditions has become an extremely important research trend. Methods Combining the latest developments in the field of carbon capture, in view of the CO2 emission in the combustion process, the advantages, disadvantages and application trends of absorption method, adsorption method, cryogenic separation, membrane absorption method, and hyper gravity method were compared. Meanwhile, the development trend of CO2 capture technology was analyzed and summarized. Results The technical characteristics of several post-combustion capture technologies for CO2 were clarified. It is elucidated that the selection of absorbent is the key to the current absorption methods, and the optimization of reactor and operating conditions are also extremely crucial. In view of adsorption methods, the development of adsorbents with high selectivity, high adsorption capacity, good desorption capacity, and low cost are the top priority for large-scale industrial applications. As for membrane technology, the advantage is easy and flexible operation, but improving the performance of membranes still requires continuous research. Overall, the characteristics, application potential and research directions of several capture technologies were clarified. Conclusions Although many CO2 absorption and separation technologies have been widely studied and applied, there are still many problems in the specific applications. In the field of carbon capture, the research on new materials and new solvents for CO2 absorption and separation is still a frontier and hot topic. From the perspective of carbon capture technology, the future development trend is likely to be the use of two or more technologies in series to meet the decarbonization demand under more complex conditions. [ABSTRACT FROM AUTHOR]

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 Journal of Tiangong University is the property of Journal of Tianjin Polytechnic University 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 decolorization of Qinghai flaxseed oil was carried out by the method of adsorption decolorization.The decolorization rate at wavelength of 665 nm was selected as the experiment indicator，and the effects of 3 single-factors (decolorization temperature，decolorization time and addition amount of adsorbent) on the decolorization process were studied.On the basis of single - factors experiment，3-variable 3-level response surface methodology were conducted to optimize the decolorization process.The results showed that the optimum conditions of the decolorization process were as follows: the decolorization temperature was 71 ℃，the decolorization time was 23 minutes，the amount of adsorbent was 4.3%，and the decolorization rate was 77.59%.

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.)