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TiO2 pillared montmorillonite in-situ growth of CeOx/MnOy nanoparticles for effective arsenic (III) adsorption in wastewater

文献类型：期刊论文

作者Wang, Yanhua1,2; Du, Yingchao1,2; Yan, Jingmin1,2; Wang, Yongliang2; Yu, Bo1,2; Zhang, Xiaomeng2; Ye, Shufeng2
刊名ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
出版日期2020-05-01
卷号27期号:15页码:17986-17996
关键词TiO2 pillared montmorillonite CeOx MnOy nanoparticles As(III) oxidation As(III) sorption High specific surface area
ISSN号0944-1344
DOI10.1007/s11356-020-08312-3
英文摘要Compared with As(V), As(III) is a tricky issue worldwide for its higher toxicity and more difficult to remove in aqueous solution. In present study, a novel CeOx/MnOy nanoparticles anchored layered structural TiO2 pillared montmorillonite (TiO2-Mt-Ce-Mn) was fabricated and applied as an efficient absorbent for As(III) removal. Under the condition of the initial As(III) concentration = 20 mg/L and adsorbent dose = 0.4 g/L, TiO2-Mt-Ce-Mn with a high specific surface area (148.099 m(2)/g) has an outstanding adsorption capacity (46.58 mg/g) for As(III) at pH 4.2, and the effect of oxy-anions on adsorption efficiency is slight except for H2PO4-. Interestingly, the layered structure provides sufficient attachment space for CeOx/MnOy nanoparticles, while CeOx/MnOy nanoparticles in turn endows TiO2-Mt a high redox potential, which further facilitates the oxidation of As(III), and this significantly reduces the toxicity of wastewater. The adsorption mechanism includes the oxidation of As(III) to As(V) by both CeOx/MnOy nanoparticles and TiO2 and effective adsorption of the residual As(III) and the formed As(V) subsequently. In addition, the adsorption efficiency of TiO2-Mt-Ce-Mn can still maintain 79.6% after five cycles through a facile regeneration method. Thus, the nanocomposite with low-cost synthesis process, high adsorption capacity, and regenerability is a promising candidate for As(III) treatment of wastewater.
WOS关键词ZERO-VALENT IRON ; AQUEOUS-SOLUTION ; OXIDE ADSORBENT ; BINARY OXIDE ; REMOVAL ; AS(III) ; OXIDATION ; AS(V) ; COMPOSITES ; CATALYSTS
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000534662400049
出版者SPRINGER HEIDELBERG
源URL[http://ir.ipe.ac.cn/handle/122111/40775]  
专题中国科学院过程工程研究所
通讯作者Zhang, Xiaomeng; Ye, Shufeng
作者单位1.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yanhua,Du, Yingchao,Yan, Jingmin,et al. TiO2 pillared montmorillonite in-situ growth of CeOx/MnOy nanoparticles for effective arsenic (III) adsorption in wastewater[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2020,27(15):17986-17996.
APA Wang, Yanhua.,Du, Yingchao.,Yan, Jingmin.,Wang, Yongliang.,Yu, Bo.,...&Ye, Shufeng.(2020).TiO2 pillared montmorillonite in-situ growth of CeOx/MnOy nanoparticles for effective arsenic (III) adsorption in wastewater.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,27(15),17986-17996.
MLA Wang, Yanhua,et al."TiO2 pillared montmorillonite in-situ growth of CeOx/MnOy nanoparticles for effective arsenic (III) adsorption in wastewater".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 27.15(2020):17986-17996.

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来源：过程工程研究所

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