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您的检索式：作者名="Bangda Wang"
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| 1 | Recent progress in ternary mixed matrix membranes for CO_(2) separation显示文摘Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousfillers,making them an effective alternative to conventional polymer membranes.However,interfacial incompatibility issues,such as the presence of interfacial voids,hardening of polymer chains,and blockage of micropores by polymers between common MMMsfillers and the polymer matrix,currently limit the gas sep-aration performance of MMMs.Ternary phase MMMs(consisting of afiller,an additive,and a matrix)made by adding a third compound,usually functionalized additives,can overcome the structural problems of binary phase MMMs and positively impact membrane separation performance.This review introduces the structure and fabrication processes for ternary MMMs,categorizes various nanofillers and the third component,and summarizes and analyzes in detail the CO_(2) separation performance of newly developed ternary MMMs based on both rubbery and glassy polymers.Based on this separation data,the challenges of ternary MMMs are also discussed.Finally,future directions for ternary MMMs are proposed. | Zikang Qin Yulei Ma Jing Wei Hongfang Guo Bangda Wang Jing Deng Chunhai Yi Nanwen Li Shouliang Yi Yi Deng Wentao Du Jian Shen Wenju Jiang Lu Yao Lin Yang Zhongde Dai | 2024 | Green Energy & Environment2024，9，5： | 0 |
| 2 | Uranium speciation in coal bottom ash investigated via X-ray absorption fine structure and X-ray photoelectron spectra显示文摘Similar to chromium contamination, the environmental contamination caused by uranium in radioactive coal bottom ash(CBA) is primarily dependent on the chemical speciation of uranium. However, the relationship between uranium speciation and environmental contamination has not been adequately studied. To determine the relationship between uranium speciation and environmental contamination, X-ray absorption fine structure(XAFS) and X-ray photoelectron spectra(XPS) analyses were performed to determine the uranium speciation in CBA exposed to different chemical environments and simulated natural environments. The leachability of the different forms of uranium in the CBA was studied via a simulated acid rain leaching experiment, and the results showed that 57.0% of the total uranium was leached out as U(VI). The results of a linear combination fit(LCF)of the X-ray absorption near edge structure(XANES) spectrum revealed that in the raw CBA, the uranium mainly occurred as U_3O_8(71.8%). However, in the iron-rich particles, the uranium mainly occurred as UO_2(91.9%) after magnetic separation. Magnetite is a ubiquitous ferrousbearing oxide, and it was effective for the sorption of U(IV). The result of FeSO_4 leaching experiment indicated that 96.57% of total uranium was reduced from U(VI) to U(IV) when infiltrated with the FeSO_4 solution for 6 months. This result clearly demonstrated the changes in chemical valence of uranium in the coal ash and provided a conceptual principle for preventing uranium migration from ash to the surrounding soil and plants. | Yinglong Sun Menxin Wu Lirong Zheng Bangda Wang Yi Wang | 2018 | Journal of Environmental Sciences2018，30，12： | 0 |
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