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TiO2 pillared montmorillonite in-situ growth of CeOx/MnOy nanoparticles for effective arsenic (III) adsorption in wastewater
Wang, Yanhua1,2; Du, Yingchao1,2; Yan, Jingmin1,2; Wang, Yongliang1; Yu, Bo1,2; Zhang, Xiaomeng1; Ye, Shufeng1
2020-05-01
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Volume27Issue:15Pages:17986-17996
AbstractCompared 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.
KeywordTiO2 pillared montmorillonite CeOx MnOy nanoparticles As(III) oxidation As(III) sorption High specific surface area
DOI10.1007/s11356-020-08312-3
Language英语
WOS KeywordZERO-VALENT IRON ; AQUEOUS-SOLUTION ; OXIDE ADSORBENT ; BINARY OXIDE ; REMOVAL ; AS(III) ; OXIDATION ; AS(V) ; COMPOSITES ; CATALYSTS
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000534662400049
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40776
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Xiaomeng; Ye, Shufeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
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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