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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
2009
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume172Issue:2-3Pages:1591-1596
AbstractNano-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.
KeywordArsenic Removal Zero-valent Iron Activated Carbon
Subject AreaEngineering ; Environmental ; Civil ; Engineering ; Environmental Sciences
Indexed BySCI
Language英语
WOS IDWOS:000271980800143
Citation statistics
Document Type期刊论文
Identifierhttp://210.72.129.5/handle/321005/54002
Collection沈阳应用生态研究所
Corresponding AuthorJia, YF, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China
Recommended Citation
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.
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