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

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Adsorptive removal of arsenic from water by an iron-zirconium binary oxide adsorbent
	Ren, Zongming 1; Zhang, Gaosheng1 ; Chen, J. Paul 2
刊名	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
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
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
文献子类	Article
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.
学科主题	Chemistry ; Physical
WOS关键词	SURFACE-PROPERTIES ; AQUEOUS-SOLUTION ; MIXED-OXIDE ; SORPTION ; PHOSPHATE ; EQUILIBRIUM ; ENVELOPES ; HYDROXIDE ; KINETICS ; AS(III)
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000289600300031
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]
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/4800]
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, 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.