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学者姓名:邵海洋
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Sustainable chemistry principles underscore the pivotal role of solvent-free processes in the fabrication of anion exchange membranes (AEMs). This study presents an eco-friendly, solvent-free approach for AEM preparation via photopolymerization, utilizing 4-vinylpyridine as the monomer and divinylbenzene as the crosslinking agent. The polymerization, conducted at ambient temperature and completed within 20 min, was followed by post-polymerization N-alkylation with ethyl bromide to introduce pyridinium groups. The precise modulation of crosslinking and N-alkylation levels enabled meticulous control over the membranes' intrinsic chemical properties and their functional effectiveness in electrodialysis desalination. The optimal membrane's area resistance was recorded at 1.09 Omega cm2, while its transport number reached 0.965, outperforming the commercial AMV AEM in desalination efficacy. This work underscores the promise of solvent-free photopolymerization as a sustainable, high-performance strategy for fabricating AEMs, providing substantial advancements in both environmental sustainability and electrodialysis desalination performance.
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GB/T 7714 | Cheng, Yafei , Zhang, Huanhuan , Yuan, Lei et al. Sustainable synthesis of high-performance anion exchange membranes for electrodialysis desalination via photopolymerization [J]. | JOURNAL OF MEMBRANE SCIENCE , 2025 , 721 . |
MLA | Cheng, Yafei et al. "Sustainable synthesis of high-performance anion exchange membranes for electrodialysis desalination via photopolymerization" . | JOURNAL OF MEMBRANE SCIENCE 721 (2025) . |
APA | Cheng, Yafei , Zhang, Huanhuan , Yuan, Lei , Shao, Haiyang , Lin, Xiaocheng . Sustainable synthesis of high-performance anion exchange membranes for electrodialysis desalination via photopolymerization . | JOURNAL OF MEMBRANE SCIENCE , 2025 , 721 . |
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Diffusion dialysis (DD) presents a highly promising and cost-efficient approach for acid recovery, yet its performance is often hindered by the acid permeability of anion exchange membranes (AEMs). To address this challenge, a one-step approach has been developed to fabricate porous AEMs. Using brominated polyphenylene oxide (BPPO) as the porous base membrane, imidazole is employed for in-situ crosslinking and cationization. This approach not only retains the inherent porosity (>63.5 %) of the base membrane but also achieves an exceptionally thin selective layer (<0.3 mu m), thereby creating abundant free space volume. Through a concurrent enhancement of ion transport sites and crosslinking density, the membrane effectively breaks acid permeability-selectivity trade-off. The optimal IPPO-20h AEM demonstrates a remarkable increase in both the acid dialysis coefficient (U-H+ = 34.1 x 10(-3) m/h) and separation factor (S-H+/(Fe)2+ = 573.8) in the HCl/FeCl2 system, with enhancements of 4- and 31-fold, respectively, compared to the commercial DF120 AEM, at 25 degrees C. This high-performance AEM, synthesized via a straightforward and mild process, offers significant potential for large-scale acid recovery applications.
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GB/T 7714 | Shao, Haiyang , Tan, Zhengke , Cheng, Yafei et al. One-step fabrication of porous anion exchange membranes for acid recovery breaking acid permeability-selectivity trade-off [J]. | JOURNAL OF MEMBRANE SCIENCE , 2025 , 723 . |
MLA | Shao, Haiyang et al. "One-step fabrication of porous anion exchange membranes for acid recovery breaking acid permeability-selectivity trade-off" . | JOURNAL OF MEMBRANE SCIENCE 723 (2025) . |
APA | Shao, Haiyang , Tan, Zhengke , Cheng, Yafei , Yue, Xiang'an , Yuan, Lei , Jian, Weixiong et al. One-step fabrication of porous anion exchange membranes for acid recovery breaking acid permeability-selectivity trade-off . | JOURNAL OF MEMBRANE SCIENCE , 2025 , 723 . |
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With the increasing severity of the plastic pollution issue, biodegradable plastics are considered a critical approach to addressing plastic pollution. However, the aging process of biodegradable plastics and the resulting microplastics adsorption of pollutants in the environment are not clearly understood. This study investigated the physicochemical property changes of different microplastics (Biodegradable microplastics and non-biodegradable microplastics) during aging, examined the adsorption processes and mechanisms of biodegradable plastics and non-degradable plastics towards typical pollutants in the environment, and elucidated the different aging mechanisms and adsorption mechanisms of biodegradable plastics and non-biodegradable plastics. The experimental results indicated that compared to non-biodegradable microplastics, biodegradable microplastics are more prone to aging in the environment, forming smaller microplastic particles and easier adsorption of environmental pollutants. Biodegradable microplastics have abundant oxygen-containing functional groups on the surface, which enhance age biodegradable microplastics adsorption capacity for pollutants through electrostatic interactions, chelation, and hydrogen bonding. The experimental results show that a strong oxidation system has unique advantages in the aging removal of biodegradable microplastics and can effectively reduce the adsorption equilibrium capacity of biodegradable microplastics. This research contributes to a deeper understanding of biodegradable microplastics’ aging and adsorption behaviors in the environment, highlighting their significant role as carriers of pollutants. © 2024 Elsevier B.V.
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GB/T 7714 | Lei, Chen , Chengkai, Mao , Shanning, Yuan et al. Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics [J]. | Chemical Engineering Journal , 2024 , 502 . |
MLA | Lei, Chen et al. "Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics" . | Chemical Engineering Journal 502 (2024) . |
APA | Lei, Chen , Chengkai, Mao , Shanning, Yuan , Xianjuan, Pu , Huanhuan, Liang , Xiangyu, Chen et al. Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics . | Chemical Engineering Journal , 2024 , 502 . |
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With the increasing severity of the plastic pollution issue, biodegradable plastics are considered a critical approach to addressing plastic pollution. However, the aging process of biodegradable plastics and the resulting microplastics adsorption of pollutants in the environment are not clearly understood. This study investigated the physicochemical property changes of different microplastics (Biodegradable microplastics and nonbiodegradable microplastics) during aging, examined the adsorption processes and mechanisms of biodegradable plastics and non-degradable plastics towards typical pollutants in the environment, and elucidated the different aging mechanisms and adsorption mechanisms of biodegradable plastics and non-biodegradable plastics. The experimental results indicated that compared to non-biodegradable microplastics, biodegradable microplastics are more prone to aging in the environment, forming smaller microplastic particles and easier adsorption of environmental pollutants. Biodegradable microplastics have abundant oxygen-containing functional groups on the surface, which enhance age biodegradable microplastics adsorption capacity for pollutants through electrostatic interactions, chelation, and hydrogen bonding. The experimental results show that a strong oxidation system has unique advantages in the aging removal of biodegradable microplastics and can effectively reduce the adsorption equilibrium capacity of biodegradable microplastics. This research contributes to a deeper understanding of biodegradable microplastics' aging and adsorption behaviors in the environment, highlighting their significant role as carriers of pollutants.
Keyword :
Adsorption mechanism Adsorption mechanism Biodegradable microplastics Biodegradable microplastics Novel aging process Novel aging process Oxygen-containing functional groups Oxygen-containing functional groups
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GB/T 7714 | Chen, Lei , Mao, Chengkai , Yuan, Shanning et al. Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 502 . |
MLA | Chen, Lei et al. "Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics" . | CHEMICAL ENGINEERING JOURNAL 502 (2024) . |
APA | Chen, Lei , Mao, Chengkai , Yuan, Shanning , Pu, Xianjuan , Liang, Huanhuan , Chen, Xiangyu et al. Comparison of aging behavior and adsorption processes of biodegradable and conventional microplastics . | CHEMICAL ENGINEERING JOURNAL , 2024 , 502 . |
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Microplastics are ubiquitous in the environment and aged microplastics are highly susceptible to absorbing pollutants from the environment. In this study, electron beam was innovatively used to treat PVC composite Cr(VI) pollutants (Composite contaminant formed by polyvinyl chloride microplastics with the heavy metal hexavalent chromium). Experiments showed that electron beam was able to achieve synergistic removal of PVC composite Cr(VI) pollutants compared to degrading the pollutants alone. During the electron beam removal of PVC composite Cr(VI) pollutants, the reduction efficiency of Cr(VI) increased from 57% to 92%, Cl− concentration increased from 3.52 to 12.41 mg L−1, and TOC concentration increased from 16.72 to 26.60 mg L−1. The research confirmed that electron beam can effectively promote the aging degradation of PVC, alter the physicochemical properties of microplastics, and generate oxygen-containing functional groups on the surface of microplastics. Aged microplastics enhanced the adsorption capacity for Cr(VI) through electrostatic and chelation interactions, and the adsorption process followed second-order kinetics and the Freundlich model. Theoretical calculations and experiments demonstrated that PVC consumed oxidizing free radical through dechlorination and decarboxylation processes, generating inorganic ions and small organic molecules. These inorganic ions and small organic molecules further reacted with oxidizing free radical to produce reducing free radicals, facilitating the reduction of Cr(VI). Cr(VI) continuously consumed the educing free radicals to transform into Cr (Ⅲ), enhancing the system oxidative atmosphere and promoting the oxidation degradation of PVC. This study investigated the formation and synergistic removal processes of PVC composite pollutants, offering new insights for controlling microplastics composite pollution. © 2024 Elsevier Ltd
Keyword :
Adsorption process Adsorption process Electron beam Electron beam Microplastics composite heavy metal pollutants Microplastics composite heavy metal pollutants Synergistic removal Synergistic removal
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GB/T 7714 | Chen, L. , Tu, M. , Mao, C. et al. Electron beam synergetic removal of microplastics and hexavalent chromium: Synergetic removal process and mechanism [J]. | Chemosphere , 2024 , 364 . |
MLA | Chen, L. et al. "Electron beam synergetic removal of microplastics and hexavalent chromium: Synergetic removal process and mechanism" . | Chemosphere 364 (2024) . |
APA | Chen, L. , Tu, M. , Mao, C. , Wang, J. , Shao, H. , Wang, H. et al. Electron beam synergetic removal of microplastics and hexavalent chromium: Synergetic removal process and mechanism . | Chemosphere , 2024 , 364 . |
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Polybrominated diphenyl ethers (PBDEs) and their alternatives (e.g., dechlorane plus (DPs) and decabromodiphenyl ethane (DBDPE)) are ubiquitous in various environmental media. However, limited data is available on these chemicals in edible fish species from the wide-open South China Sea (SCS). In the present study, ten legacy PBDEs and three substitutions (DBDPE and two DPs) were analyzed in 16 wild fish species sampled from the open SCS to investigate their spatial and species-specific variations. The results showed that the total concentrations of PBDEs, DBDPE, and DPs in fish samples were in the range of 1.69-47.6, not detected (nd) to 21.0, and nd to 3.80 ng/g lipid weight (lw), respectively. BDEs 47, 209 and 100 were the dominant target PBDE congeners, representing 49.2%, 17.2% and 9.93% of the total PBDE concentrations, respectively. Higher concentrations of PBDEs, DBDPE, and DPs were found in fish species from the Wanshan Archipelago compared to those from the Mischief Reef and the Yongxing Island, suggesting the significant influence of anthropogenic activities. Species-specific differences in levels of PBDEs were observed, with the order of bathydemersal > demersal > pelagic approximate to reef-associated > benthopelagic species. The average fanti value of all fish samples was 0.68, suggesting commercial DP products as a contamination source. The levels of PBDEs, DPs, and DBDPE in fish samples were relatively low compared with those from other locations around the globe. Finally, the health risks concerning the ingestion of BDEs 47, 99, 153 and 209 via fish consumption collected from the SCS are negligible.
Keyword :
Decabromodiphenyl ethane Decabromodiphenyl ethane Dechlorane plus Dechlorane plus Edible fish Edible fish Human health risk Human health risk Polybrominated diphenyl ethers Polybrominated diphenyl ethers
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GB/T 7714 | Sun, Run-Xia , Pan, Chang-Gui , Peng, Feng-Jiao et al. Evidence of polybrominated diphenyl ethers (PBDEs) and alternative halogenated flame retardants (AHFRs) in wild fish species from the remote tropical marine environment, south China sea [J]. | ENVIRONMENTAL POLLUTION , 2024 , 361 . |
MLA | Sun, Run-Xia et al. "Evidence of polybrominated diphenyl ethers (PBDEs) and alternative halogenated flame retardants (AHFRs) in wild fish species from the remote tropical marine environment, south China sea" . | ENVIRONMENTAL POLLUTION 361 (2024) . |
APA | Sun, Run-Xia , Pan, Chang-Gui , Peng, Feng-Jiao , Yu, Zi-Ling , Shao, Hai-Yang , Yang, Bing-Zhong et al. Evidence of polybrominated diphenyl ethers (PBDEs) and alternative halogenated flame retardants (AHFRs) in wild fish species from the remote tropical marine environment, south China sea . | ENVIRONMENTAL POLLUTION , 2024 , 361 . |
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Microplastics are widely present in the natural environment and exhibit a strong affinity for heavy metals in water, resulting in the formation of microplastics composite heavy metal pollutants. This study investigated the adsorption of heavy metals by electron beam-aged microplastics. For the first time, electron beam irradiation was employed to degrade polypropylene, demonstrating its ability to rapidly age microplastics and generate a substantial number of oxygen-containing functional groups on aged microplastics surface. Adsorption experiments revealed that the maximum adsorption equilibrium capacity of hexavalent chromium by aged microplastics reached 9.3 mg g−1. The adsorption process followed second-order kinetic model and Freundlich model, indicating that the main processes of heavy metal adsorption by aged microplastics are chemical adsorption and multilayer adsorption. The adsorption of heavy metals on aged microplastics primarily relies on the electrostatic and chelation effects of oxygen-containing functional groups. The study results demonstrate that environmental factors, such as pH, salinity, coexisting metal ions, humic acid, and water matrix, exert inhibitory effects on the adsorption of heavy metals by microplastics. Theoretical calculations confirm that the aging process of microplastics primarily relies on hydroxyl radicals breaking carbon chains and forming oxygen-containing functional groups on the surface. The results indicate that electron beam irradiation can simultaneously oxidize and degrade microplastics while reducing hexavalent chromium levels by approximately 90%, proposing a novel method for treating microplastics composite pollutants. Gas chromatography-mass spectrometry analysis reveals that electron beam irradiation can oxidatively degrade microplastics into esters, alcohols, and other small molecules. This study proposes an innovative and efficient approach to treat both microplastics composite heavy metal pollutants while elucidating the impact of environmental factors on the adsorption of heavy metals by electron beam-aged microplastics. The aim is to provide a theoretical basis and guidance for controlling microplastics composite pollution. © 2024 Elsevier Ltd
Keyword :
Adsorption Adsorption Electron beams Electron beams Electrons Electrons Gas chromatography Gas chromatography Heavy metals Heavy metals Irradiation Irradiation Mass spectrometry Mass spectrometry Metal ions Metal ions Oxygen Oxygen Polypropylenes Polypropylenes Water pollution Water pollution
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GB/T 7714 | Chen, Lei , Xie, Nan , Yuan, Shanning et al. Adsorption mechanism of hexavalent chromium on electron beam-irradiated aged microplastics: Novel aging processes and environmental factors [J]. | Chemosphere , 2024 , 363 . |
MLA | Chen, Lei et al. "Adsorption mechanism of hexavalent chromium on electron beam-irradiated aged microplastics: Novel aging processes and environmental factors" . | Chemosphere 363 (2024) . |
APA | Chen, Lei , Xie, Nan , Yuan, Shanning , Shao, Haiyang . Adsorption mechanism of hexavalent chromium on electron beam-irradiated aged microplastics: Novel aging processes and environmental factors . | Chemosphere , 2024 , 363 . |
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A green anion exchange membrane for electrodialysis desalination was synthesized using a solvent-free photo polymerization approach. Vinylbenzyl chloride (monomer), tripropylene glycol diacrylate (crosslinker), and photoinitiator were mixed and subjected to UV polymerization for 20 min to create the base membrane, followed by positive charge modification with 1-methylimidazole. This method avoids organic solvents, offering economic and environmental benefits. By adjusting the degrees of crosslinking and positive charge, precise control over the membrane's microstructure and properties was achieved. The optimized membrane showed an area resistance 1.67 Omega cm(2) and a transport number of 0.956, demonstrating exceptional electrochemical performance. Under comparable conditions, the optimized membrane improved the NaCl removal rate by 11.47 %, increased current efficiency by 10.61 %, and reduced energy consumption by 16.75 % compared to commercial AMV membrane, highlighting its potential for scalable seawater desalination through electrodialysis.
Keyword :
Anion exchange membrane Anion exchange membrane Desalination Desalination Electrodialysis Electrodialysis Photo-polymerization Photo-polymerization Solvent-free Solvent-free
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GB/T 7714 | Ge, Xuehui , Zhang, Huanhuan , Cheng, Yafei et al. Solvent-free green synthesis of anion exchange membranes via photo-polymerization for efficient desalination by electrodialysis [J]. | DESALINATION , 2024 , 592 . |
MLA | Ge, Xuehui et al. "Solvent-free green synthesis of anion exchange membranes via photo-polymerization for efficient desalination by electrodialysis" . | DESALINATION 592 (2024) . |
APA | Ge, Xuehui , Zhang, Huanhuan , Cheng, Yafei , Shao, Haiyang , Yuan, Lei , Shen, Senbin et al. Solvent-free green synthesis of anion exchange membranes via photo-polymerization for efficient desalination by electrodialysis . | DESALINATION , 2024 , 592 . |
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