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Superior immobilization of U(VI) and Am-243(III) on polyethyleneimine modified lamellar carbon nitride composite from water environment

文献类型：期刊论文

作者Wang, Pengyi1; Yin, Ling1; Wang, Jian1; Xu, Chao2; Liang, Yu1; Yao, Wen1; Wang, Xiangxue1; Yu, Shujun1; Chen, Jing2; Sun, Yubing1,3
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2017-10-15
卷号326页码:863-874
关键词Polyethyleneimine u(Vi) Carbon Nitride Adsorption Exafs
DOI10.1016/j.cej.2017.06.034
文献子类Article
英文摘要A novel low-cost, effective and environmental-friendly laminated carbon nitride decorated with polydopamine (PDA) and grafted with polyethyleneimine (PEI) brush (l-C3N4/PDA/PEI3) was successfully synthesized and applied as environmental cleaner for removing U(VI) ions from aqueous solutions under various environmental conditions. The adsorption isotherms fitted well by the Langmuir model, suggesting that the removal of U(VI) on l-C3N4/PDA/PEI3 was monolayer coverage. The effects of different PEI contents were also investigated and the results demonstrated that the adsorption capacity of U(VI) on l-C3N4/PDA/PEIx decreased at higher content of PEI. Typically, various cations (Ca2+ and Mg2+) and SO42 could inhibit the adsorption through competitive coordination with U(VI), while CO32 promoted U(VI) sorption owing to the formation of indissolvable complexes. The main driving force between U(VI) and l-C3N4/PDA/PEI3 was surface complexation with various functional groups (C=C, C=O, N-C=C, and C-C or C-H) and electrostatic attraction. According to the analysis of EXAFS spectra, the occurrence of U-C and U-U shell revealed that inner-sphere complexation and surface co-precipitation dominated the adsorption of U(VI) on l-C3N4/PDA/PEI3 at pH 5.0. The composites were also applied to remove Am-243(III), Cu(II) and Pb(II) ions at different pH values, and similar results were also found for these metal ions. Such a facile synthesis method and efficient removal performance suggested that the l-C3N4/PDA/PEI3 materials might be a promising adsorbent for efficient elimination of radionuclides and heavy metal ions in environmental pollution management. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词ZERO-VALENT IRON ; GRAPHENE OXIDE NANOSHEETS ; LAYERED DOUBLE HYDROXIDE ; ABSORPTION FINE-STRUCTURE ; COEFFICIENT K-D ; ENHANCED SEQUESTRATION ; AQUEOUS-SOLUTIONS ; THEORETICAL CALCULATIONS ; ADSORPTIVE REMOVAL ; EFFICIENT REMOVAL
WOS研究方向Engineering
语种英语
WOS记录号WOS:000406137200087
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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33544]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China
2.Tsinghua Univ, Collaborat Innovat Ctr Adv Nucl Energy Technol, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Anhui, Peoples R China
4.Soochow Univ, Collaborat Innovat Ctr Radiat Med, Jiangsu Higher Educ Inst, Suzhou 215123, Peoples R China
5.Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Pengyi,Yin, Ling,Wang, Jian,et al. Superior immobilization of U(VI) and Am-243(III) on polyethyleneimine modified lamellar carbon nitride composite from water environment[J]. CHEMICAL ENGINEERING JOURNAL,2017,326:863-874.
APA Wang, Pengyi.,Yin, Ling.,Wang, Jian.,Xu, Chao.,Liang, Yu.,...&Wang, Xiangke.(2017).Superior immobilization of U(VI) and Am-243(III) on polyethyleneimine modified lamellar carbon nitride composite from water environment.CHEMICAL ENGINEERING JOURNAL,326,863-874.
MLA Wang, Pengyi,et al."Superior immobilization of U(VI) and Am-243(III) on polyethyleneimine modified lamellar carbon nitride composite from water environment".CHEMICAL ENGINEERING JOURNAL 326(2017):863-874.

入库方式： OAI收割

来源：合肥物质科学研究院

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