Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent

	Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent
	Ren, Zongming 1; Zhang, Gaosheng1 ; Chen, J. Paul 2
发表期刊	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2011-06-01
卷号	358 期号:1 页码:230-237
关键词	Fe-zr Binary Oxide Arsenate Arsenite Adsorption Removal
产权排序	[Ren, Zongming; Zhang, Gaosheng] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China; [Chen, J. Paul] Natl Univ Singapore, Div Environm Sci & Engn, Singapore 117576, Singapore
通讯作者	Zhang, GS, Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, 17th Chunhui Rd, Yantai 264003, Peoples R China.gszhang@yic.ac.cn
作者部门	滨海湿地实验室
英文摘要	Arsenate and arsenite may exist simultaneously in groundwater and have led to a greater risk to human health. In this study, an iron-zirconium (Fe-Zr) binary oxide adsorbent for both arsenate and arsenite removal was prepared by a coprecipitation method. The adsorbent was amorphous with a specific surface area of 339 m(2)/g. It was effective for both As(V) and As(III) removal; the maximum adsorption capacities were 46.1 and 120.0 mg/g at pH 7.0, respectively, much higher than for many reported adsorbents. Both As(V) and As(III) adsorption occurred rapidly and achieved equilibrium within 25 h, which were well fitted by the pseudo-second-order equation. Competitive anions hindered the sorption according to the sequence PO43- > SiO32- > CO > SO42-. The ionic strength effect experiment, measurement of zeta potential, and FTIR study indicate that As(V) forms inner-sphere surface complexes, while As(III) forms both inner- and outer-sphere surface complexes at the water/Fe-Zr binary oxide interface. The high uptake capability and good stability of the Fe-Zr binary oxide make it a potentially attractive adsorbent for the removal of both As(V) and As(III) from water. (C) 2011 Elsevier Inc. All rights reserved.; Arsenate and arsenite may exist simultaneously in groundwater and have led to a greater risk to human health. In this study, an iron-zirconium (Fe-Zr) binary oxide adsorbent for both arsenate and arsenite removal was prepared by a coprecipitation method. The adsorbent was amorphous with a specific surface area of 339 m(2)/g. It was effective for both As(V) and As(III) removal; the maximum adsorption capacities were 46.1 and 120.0 mg/g at pH 7.0, respectively, much higher than for many reported adsorbents. Both As(V) and As(III) adsorption occurred rapidly and achieved equilibrium within 25 h, which were well fitted by the pseudo-second-order equation. Competitive anions hindered the sorption according to the sequence PO43- > SiO32- > CO > SO42-. The ionic strength effect experiment, measurement of zeta potential, and FTIR study indicate that As(V) forms inner-sphere surface complexes, while As(III) forms both inner- and outer-sphere surface complexes at the water/Fe-Zr binary oxide interface. The high uptake capability and good stability of the Fe-Zr binary oxide make it a potentially attractive adsorbent for the removal of both As(V) and As(III) from water. (C) 2011 Elsevier Inc. All rights reserved.
文章类型	Article
资助机构	National Natural Science Foundation of China [30871530]; Science and Technology Transformation Plan of Henan Province [0636000005]; Chinese Academy of Sciences (CAS) ; CAS/SAFEA ; CAS, China [2009Y2B211]
收录类别	SCI
语种	英语
关键词[WOS]	SURFACE-PROPERTIES ; AQUEOUS-SOLUTION ; MIXED-OXIDE ; SORPTION ; PHOSPHATE ; EQUILIBRIUM ; ENVELOPES ; HYDROXIDE ; KINETICS ; AS(III)
研究领域[WOS]	Chemistry
WOS记录号	WOS:000289600300031
引用统计	被引频次：232[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/4799
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_污染过程与控制实验室
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China 2.Natl Univ Singapore, Div Environm Sci & Engn, Singapore 117576, Singapore
推荐引用方式 GB/T 7714	Ren, Zongming,Zhang, Gaosheng,Chen, J. Paul. Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2011,358(1):230-237.
APA	Ren, Zongming,Zhang, Gaosheng,&Chen, J. Paul.(2011).Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent.JOURNAL OF COLLOID AND INTERFACE SCIENCE,358(1),230-237.
MLA	Ren, Zongming,et al."Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent".JOURNAL OF COLLOID AND INTERFACE SCIENCE 358.1(2011):230-237.

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