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Simultaneous removal of arsenate and arsenite by a nanostructured zirconium-manganese binary hydrous oxide: Behavior and mechanism

文献类型：期刊论文

作者Zhang, Gaosheng1,2,3; Khorshed, Alam1; Chen, J. Paul1
刊名JOURNAL OF COLLOID AND INTERFACE SCIENCE
出版日期2013-05-01
卷号397页码:137-143
关键词Zr-mn Binary Hydrous Oxide Arsenate Arsenite Adsorption Oxidation
ISSN号0021-9797
产权排序[Zhang, Gaosheng; Khorshed, Alam; Chen, J. Paul] Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore; [Zhang, Gaosheng] Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China; [Zhang, Gaosheng] Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China
通讯作者Zhang, GS (reprint author), Natl Univ Singapore, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 117576, Singapore. gszhang@yic.ac.cn ; paulchen@nus.edu.sg
文献子类Article
英文摘要Arsenate and arsenite typically co-exist in groundwater. Arsenite is more toxic than arsenate, while it is more difficult to be removed than arsenate. In order to effectively remove arsenate and arsenite simultaneously from water solution, a nanostructured zirconium-manganese binary hydrous oxide was successfully developed in this study. The amorphous sorbent was aggregate of nanoparticles with a high surface area of 213 m(2) g(-1). Our sorption experiments showed that the nano-scale particles could effectively oxidize As(III) to As(V) and greatly remove both As(V) and As(III). The maximal adsorption capacities of As(V) and As(III) were 80 and 104 mg g(-1) at pH 5.0, respectively. As(V) uptake may be mainly achieved through replacement of hydroxyl groups and sulfate anions on the surface of the oxide and formation of inner complexes. The As(III) removal was essentially due to a sorption coupled with oxidation process; the MnO2 was mainly responsible for oxidization of As(III) to As(V) that was subsequently adsorbed onto ZrO2. (C) 2012 Elsevier Inc. All rights reserved.; Arsenate and arsenite typically co-exist in groundwater. Arsenite is more toxic than arsenate, while it is more difficult to be removed than arsenate. In order to effectively remove arsenate and arsenite simultaneously from water solution, a nanostructured zirconium-manganese binary hydrous oxide was successfully developed in this study. The amorphous sorbent was aggregate of nanoparticles with a high surface area of 213 m(2) g(-1). Our sorption experiments showed that the nano-scale particles could effectively oxidize As(III) to As(V) and greatly remove both As(V) and As(III). The maximal adsorption capacities of As(V) and As(III) were 80 and 104 mg g(-1) at pH 5.0, respectively. As(V) uptake may be mainly achieved through replacement of hydroxyl groups and sulfate anions on the surface of the oxide and formation of inner complexes. The As(III) removal was essentially due to a sorption coupled with oxidation process; the MnO2 was mainly responsible for oxidization of As(III) to As(V) that was subsequently adsorbed onto ZrO2. (C) 2012 Elsevier Inc. All rights reserved.
学科主题Chemistry, Physical
URL标识查看原文
WOS关键词TITANIUM-DIOXIDE ; IRON-OXIDE ; ADSORPTION ; AS(III) ; ADSORBENT ; AS(V) ; SORPTION ; SURFACE ; XPS ; SPECTROSCOPY
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000316776600018
资助机构National Research Foundation of Singapore [R-302-000-026-281]; National Natural Science Foundation of China [51178453]
公开日期2013-08-15
源URL[http://ir.yic.ac.cn/handle/133337/6671]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_污染过程与控制实验室
作者单位1.Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China
3.Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Gaosheng,Khorshed, Alam,Chen, J. Paul. Simultaneous removal of arsenate and arsenite by a nanostructured zirconium-manganese binary hydrous oxide: Behavior and mechanism[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2013,397:137-143.
APA Zhang, Gaosheng,Khorshed, Alam,&Chen, J. Paul.(2013).Simultaneous removal of arsenate and arsenite by a nanostructured zirconium-manganese binary hydrous oxide: Behavior and mechanism.JOURNAL OF COLLOID AND INTERFACE SCIENCE,397,137-143.
MLA Zhang, Gaosheng,et al."Simultaneous removal of arsenate and arsenite by a nanostructured zirconium-manganese binary hydrous oxide: Behavior and mechanism".JOURNAL OF COLLOID AND INTERFACE SCIENCE 397(2013):137-143.

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