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Enhanced arsenate removal by novel Fe-La composite (hydr)oxides synthesized via coprecipitation

文献类型：期刊论文

作者Zhang, Wei1,2,3; Fu, Jun4; Zhang, Gaosheng1,2; Zhang, Xiwang5
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2014-09-01
卷号251页码:69-79
关键词Fe-La composite (hydr)oxides Arsenate Adsorption Removal
ISSN号1385-8947
产权排序[Zhang, Wei; Zhang, Gaosheng] Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, Shandong 264003, Peoples R China; [Zhang, Wei; Zhang, Gaosheng] YICCAS, Res Ctr Coastal Environm Engn & Technol Shandong, Shandong 264003, Peoples R China; [Zhang, Wei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Fu, Jun] Sino Japan Friendship Ctr Environm Protect, Beijing 100029, Peoples R China; [Zhang, Xiwang] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia
通讯作者Zhang, GS (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, 17th Chunhui Rd, Shandong 264003, Peoples R China. gszhang@yic.ac.cn
中文摘要Arsenic exists ubiquitously in the environment and has been proved to be of great harm to human health. In this study, a series of Fe-La composite (hydr)oxides were synthesized via a facile coprecipitation for effective As(V) removal from aqueous solution. A variety of techniques including BET surface area measurement, powder XRD, SEM, and XPS were employed to characterize the synthetic Fe-La composite (hydr)oxides. Fe-La composite (hydr)oxides grains were formed via aggregation of primary nanoparticles. With an increase in La content, the specific surface area of Fe-La composite (hydr)oxides decreased, but the pore diameter, the pore volume and the grain size of Fe-La composite (hydr)oxides increased gradually. Rapid As(V) adsorption on the synthesized composite oxides was achieved and the adsorption was well fitted by the pseudo-second-order equation. The adsorption isotherms could be well described by Langmuir equation and the maximal adsorption capacity of Fe-La composite (hydr)oxides can reach 368 mg/g. The As(V) removal was pH-dependent and decreased with an increase in pH value, especially in alkaline condition. Under acidic and neutral conditions, As(V) removal was mainly achieved by both precipitation and adsorption. By contrast, adsorption is the only mechanism for As(V) removal in alkaline condition. The results indicate that the Fe-La composite (hydr)oxides could be potentially attractive adsorbents for As(V) removal. (C) 2014 Elsevier B.V. All rights reserved.
英文摘要Arsenic exists ubiquitously in the environment and has been proved to be of great harm to human health. In this study, a series of Fe-La composite (hydr)oxides were synthesized via a facile coprecipitation for effective As(V) removal from aqueous solution. A variety of techniques including BET surface area measurement, powder XRD, SEM, and XPS were employed to characterize the synthetic Fe-La composite (hydr)oxides. Fe-La composite (hydr)oxides grains were formed via aggregation of primary nanoparticles. With an increase in La content, the specific surface area of Fe-La composite (hydr)oxides decreased, but the pore diameter, the pore volume and the grain size of Fe-La composite (hydr)oxides increased gradually. Rapid As(V) adsorption on the synthesized composite oxides was achieved and the adsorption was well fitted by the pseudo-second-order equation. The adsorption isotherms could be well described by Langmuir equation and the maximal adsorption capacity of Fe-La composite (hydr)oxides can reach 368 mg/g. The As(V) removal was pH-dependent and decreased with an increase in pH value, especially in alkaline condition. Under acidic and neutral conditions, As(V) removal was mainly achieved by both precipitation and adsorption. By contrast, adsorption is the only mechanism for As(V) removal in alkaline condition. The results indicate that the Fe-La composite (hydr)oxides could be potentially attractive adsorbents for As(V) removal. (C) 2014 Elsevier B.V. All rights reserved.
学科主题Engineering, Environmental; Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]BINARY OXIDE ADSORBENT ; AQUEOUS-SOLUTIONS ; ARSENIC(III) SORPTION ; IRON HYDROXIDE ; MIXED-OXIDE ; BY-PRODUCT ; ADSORPTION ; WATER ; GROUNDWATER ; PHOSPHATE
收录类别SCI
语种英语
WOS记录号WOS:000338802500009
源URL[http://ir.yic.ac.cn/handle/133337/8716]  
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.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, Shandong 264003, Peoples R China
2.YICCAS, Res Ctr Coastal Environm Engn & Technol Shandong, Shandong 264003, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Sino Japan Friendship Ctr Environm Protect, Beijing 100029, Peoples R China
5.Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia
推荐引用方式
GB/T 7714		 Zhang, Wei,Fu, Jun,Zhang, Gaosheng,et al. Enhanced arsenate removal by novel Fe-La composite (hydr)oxides synthesized via coprecipitation[J]. CHEMICAL ENGINEERING JOURNAL,2014,251:69-79.
APA Zhang, Wei,Fu, Jun,Zhang, Gaosheng,&Zhang, Xiwang.(2014).Enhanced arsenate removal by novel Fe-La composite (hydr)oxides synthesized via coprecipitation.CHEMICAL ENGINEERING JOURNAL,251,69-79.
MLA Zhang, Wei,et al."Enhanced arsenate removal by novel Fe-La composite (hydr)oxides synthesized via coprecipitation".CHEMICAL ENGINEERING JOURNAL 251(2014):69-79.

入库方式： OAI收割

来源：烟台海岸带研究所

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