Removal of arsenic from water by supported nano zero-valent iron on activated carbon

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	Removal of arsenic from water by supported nano zero-valent iron on activated carbon
	Zhu, HJ; Jia, YF; Wu, X; Wang, H; Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2009
卷号	172 期号:2-3 页码:1591-1596
关键词	Arsenic Removal Zero-valent Iron Activated Carbon
ISSN号	0304-3894
英文摘要	Nano-sized zero-valent iron is an effective adsorbent for arsenic removal from drinking water. However, its application may be limited in public water system and small scale water treatment system due to its tiny particle size. In the present work, nanoscale zero-valent iron was supported onto activated carbon (NZVI/AQ by impregnating carbon with ferrous sulfate followed by chemical reduction with NaBH4. Approximate 8.2 wt% of iron was loaded onto carbon and SEM analysis showed that the iron particles in the pores of carbon were needle-shaped with the size of 30-500 x 1000-2000 nm. Kinetics study revealed that adsorption of arsenite and arsenate by NZVI/AC was fast in the first 12 h and the equilibrium was achieved in similar to 72 h. The adsorption capacity of the synthesized sorbent for arsenite and arsenate at pH 6.5 calculated from Langmuir adsorption isotherms in batch experiments was 18.2 and 12.0 mg/g, respectively. Phosphate and silicate markedly decreased the removal of both arsenite and arsenate, while the effect of other anions and humic acid was insignificant. Common metal cations (Ca2+, Mg2+) enhanced arsenate adsorption but ferrous iron (Fe2+) was found to suppress arsenite adsorption. NZVI/AC can be effectively regenerated by elution with 0.1 M NaOH. (C) 2009 Elsevier B.V. All rights reserved.
学科主题	Engineering ; Environmental ; Civil ; Engineering ; Environmental Sciences
语种	英语
WOS记录号	WOS:000271980800143
资助机构	Ministry of Science and Technology of China [2009CB426301, 2004CB418506]; National Natural Science Foundation of China [40773076]
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54003]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhu, HJ,Jia, YF,Wu, X,et al. Removal of arsenic from water by supported nano zero-valent iron on activated carbon[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,172(2-3):1591-1596.
APA	Zhu, HJ,Jia, YF,Wu, X,Wang, H,&Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China.(2009).Removal of arsenic from water by supported nano zero-valent iron on activated carbon.JOURNAL OF HAZARDOUS MATERIALS,172(2-3),1591-1596.
MLA	Zhu, HJ,et al."Removal of arsenic from water by supported nano zero-valent iron on activated carbon".JOURNAL OF HAZARDOUS MATERIALS 172.2-3(2009):1591-1596.