Detoxification and selective separation of Cr(VI) and As(III) in wastewater based on interfacial coupling in BiOBr with {110} facet under visible-light irradiation

	Detoxification and selective separation of Cr(VI) and As(III) in wastewater based on interfacial coupling in BiOBr with {110} facet under visible-light irradiation
	Li, Tong; Zhang, Lili; Gao, Yaowen ; Xing, Xueci ; Zhang, Xiaohan ; Li, Fan ; Hu, Chun
	2022-06-15
Source Publication	APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN	0926-3373
Volume	307 Issue:0 Pages:121192
Abstract	Layered structural BiOBr with {110} facet exposure is a promising functional material for highly selective adsorption and separation of heavy metal ions in water purification. In this study, the distinct adsorption behaviors of As(III), As(V), and Cr(VI) on {110} facet were theoretically and experimentally investigated. The results suggested that uncharged As(III) was dominantly adsorbed on the [Bi2O2](2+) surface replacing the hydroxyl group, whereas Cr(VI) and As(V) oxyanions preferentially intercalated on {110} facet by exchange with Br- ions between the layers. Moreover, due to interfacial coupling configuration ([BiO-CrO4-OBi]-O-As(OH)(2)) between the surface and interlayer on {110} facet, the synergic removal of Cr(VI) and As(III) could be accelerated under photoexcitation to induce a direct electron transfer from surface AsIII to interlayer CrVI, forming AsV and CrIII. Subsequently, approximately 69.3% of Cr(III) and 98.6% of As(V) were readily desorbed in acidic conditions and a high concentration of Br- solution, respectively, to achieve simultaneous detoxification and selective separation.
Department	中国科学院饮用水科学与技术重点实验室 ; 中国科学院饮用水科学与技术重点实验室
Keyword	DEPENDENT PHOTOREACTIVITY CHARGE SEPARATION REDOX CONVERSION OXIDE ADSORBENT METAL REMOVAL BINARY OXIDE CHROMIUM(VI) ARSENIC(III) PHOTOCATALYSIS MECHANISM
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/47838
Collection	中国科学院饮用水科学与技术重点实验室
Corresponding Author	Li, Fan
Affiliation	1.Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China 2.Guangzhou Univ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
Recommended Citation GB/T 7714	Li, Tong,Zhang, Lili,Gao, Yaowen,et al. Detoxification and selective separation of Cr(VI) and As(III) in wastewater based on interfacial coupling in BiOBr with {110} facet under visible-light irradiation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2022,307(0):121192.
APA	Li, Tong.,Zhang, Lili.,Gao, Yaowen.,Xing, Xueci.,Zhang, Xiaohan.,...&Hu, Chun.(2022).Detoxification and selective separation of Cr(VI) and As(III) in wastewater based on interfacial coupling in BiOBr with {110} facet under visible-light irradiation.APPLIED CATALYSIS B-ENVIRONMENTAL,307(0),121192.
MLA	Li, Tong,et al."Detoxification and selective separation of Cr(VI) and As(III) in wastewater based on interfacial coupling in BiOBr with {110} facet under visible-light irradiation".APPLIED CATALYSIS B-ENVIRONMENTAL 307.0(2022):121192.

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