中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A novel ternary magnetic Fe3O4/g-C3N4/Carbon layer composite for ef ficient removal of Cr (VI): A combined approach using both batch experiments and theoretical calculation

文献类型:期刊论文

作者Wang, Tao3,4; Zheng, Lewen2; Liu, Yonghong5; Tang, Wei4; Fang, Tao3,4; Xing, Baoshan1
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2020-08-15
卷号730页码:11
ISSN号0048-9697
关键词Magnetic Fe3O4/g-C3N4/CL composite Cr (VI) adsorption Cr (III) immobilization Mechanism analysis DFT calculation
DOI10.1016/j.scitotenv.2020.138928
通讯作者Fang, Tao(fangt@ihb.ac.cn)
英文摘要Heavy metal pollution has posed a potential hazard to the ecological environment and human health. Herein, a novel ternary magnetic adsorbent (Fe3O4/g-C3N4/Carbon layer, Carbon layer: hydrothermal products from sucrose) was synthesized through a simple hydrothermal carbonization (HTC) method for removal of hexavalent chromium (Cr (VI)) removal. The Carbon layer (CL) formed during the HTC of carbon precursors (sucrose) acted as a reducing agent. Also, it has abundant oxygen-containing groups on its surface. The Fe3O4/g-C3N4/CL had a high removal capacity for Cr (VI) (50.09 mg/g), and excellent regeneration and magnetic separation performance. Importantly, the Fe3O4/g-C3N4/CL could not only improve the adsorption ability for Cr (VI), but also strengthen the immobilization of Cr (III). Based on the comprehensive experiments and characterization, combined with DFT calculations, we proposed that, the first time, the removal of Cr (VI) was controlled by three consecutive processes: (1) ion exchange of Cr (VI) by hydroxyl groups, (2) reduction of Cr (VI) to Cr (III) by electron-donor (oxygen-containing) groups (EDGs), and (3) complexation of Cr (III) by amine groups. This study provides a new avenue for the removal of toxic oxygen anions and reveals an original removal mechanism of Fe3O4/g-C3N4/CLx (x = hydrothermal products from carbon precursors (glucose, ascorbic acid, cellulose)). (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词GRAPHITIC CARBON NITRIDE ; AQUEOUS-SOLUTIONS ; GRAPHENE OXIDE ; G-C3N4 NANOSHEETS ; CD(II) REMOVAL ; IN-SITU ; ADSORPTION ; CR(VI) ; FABRICATION ; ADSORBENT
资助项目National Key R&D Program of China[2018YFD0900801] ; Major Science and Technology Program for Water Pollution Control and Treatment[2017ZX07603-003]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者ELSEVIER
WOS记录号WOS:000537446400020
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment ; Major Science and Technology Program for Water Pollution Control and Treatment
源URL[http://ir.ihb.ac.cn/handle/342005/36703]  
专题水生生物研究所_水环境工程研究中心_期刊论文
通讯作者Fang, Tao
作者单位1.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA
2.Northwestern Polytech Univ, Sch Nat & Appl Sci, Xian 710129, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Peoples R China
5.Huazhong Agr Univ, Coll Sci, Wuhan 430070, Peoples R China
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Wang, Tao,Zheng, Lewen,Liu, Yonghong,et al. A novel ternary magnetic Fe3O4/g-C3N4/Carbon layer composite for ef ficient removal of Cr (VI): A combined approach using both batch experiments and theoretical calculation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,730:11.
APA Wang, Tao,Zheng, Lewen,Liu, Yonghong,Tang, Wei,Fang, Tao,&Xing, Baoshan.(2020).A novel ternary magnetic Fe3O4/g-C3N4/Carbon layer composite for ef ficient removal of Cr (VI): A combined approach using both batch experiments and theoretical calculation.SCIENCE OF THE TOTAL ENVIRONMENT,730,11.
MLA Wang, Tao,et al."A novel ternary magnetic Fe3O4/g-C3N4/Carbon layer composite for ef ficient removal of Cr (VI): A combined approach using both batch experiments and theoretical calculation".SCIENCE OF THE TOTAL ENVIRONMENT 730(2020):11.

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来源:水生生物研究所

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