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Article: Preparation and evaluation of a magnetite-doped activated carbon fiber for enhanced arsenic removal

TitlePreparation and evaluation of a magnetite-doped activated carbon fiber for enhanced arsenic removal
Authors
KeywordsAdsorption capability
Adsorption capacities
Arsenic removal
As removal
Drinking water
Issue Date2010
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/carbon
Citation
Carbon, 2010, v. 48 n. 1, p. 60-67 How to Cite?
Abstract
To enhance As(V) removal, an activated carbon fiber (ACF) based adsorbent was fabricated by impregnation of nano-sized magnetite to the surface of ACF with chitosan as the coating support. The As(V) adsorption capacity of the modified ACF (MACF) was approximately eight times of that of the raw ACF (RACF). Even at As(V) concentrations lower than 10 μg L-1, the MACF exhibited a considerably high adsorption capacity to As(V), whereas the RACF was ineffective even at an As(V) concentration ten times higher to 10 μg L-1. The MACF was able to reduce As(V) concentration below its maximum contaminant level regulated by the US EPA for drinking water in a wide pH range without formation of the more poisonous As(III). Kinetic experiments indicated that the diffusion of As(V) within the pores of the MACF was more rapid than that of the RACF and that the surface reaction was the dominant step in the adsorption of As(V) onto the MACF. Compared with the RACF, the MACF had a wider applicable pH range from 2 to 8 for the As(V) uptake. Besides enhanced As(V) uptake, the MACF maintained its high adsorption capability to organic contaminants, such as phenol and humic acid. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/129128
ISSN
2013 Impact Factor: 6.160
2013 SCImago Journal Rankings: 2.414
ISI Accession Number ID
Funding AgencyGrant Number
National University of SingaporeR-288-000-023-112
R279-000-175-112
Hong Kong SAR Government of ChinaHKU7120/03E
National Natural Science Foundation of China50728806
Funding Information:

The financial support provided to JP Chen and SJ Zhang by the National University of Singapore (R-288-000-023-112 and R279-000-175-112) is appreciated. This research was partially supported by the Research Grants Council of the Hong Kong SAR Government of China under Grant HKU7120/03E and by the National Natural Science Foundation of China under the Grant No. 50728806.

References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Sen_HK
dc.contributor.authorLi, Xyen_HK
dc.contributor.authorChen, JPen_HK
dc.date.accessioned2010-12-23T08:32:52Z-
dc.date.available2010-12-23T08:32:52Z-
dc.date.issued2010en_HK
dc.identifier.citationCarbon, 2010, v. 48 n. 1, p. 60-67en_HK
dc.identifier.issn0008-6223en_HK
dc.identifier.urihttp://hdl.handle.net/10722/129128-
dc.description.abstractTo enhance As(V) removal, an activated carbon fiber (ACF) based adsorbent was fabricated by impregnation of nano-sized magnetite to the surface of ACF with chitosan as the coating support. The As(V) adsorption capacity of the modified ACF (MACF) was approximately eight times of that of the raw ACF (RACF). Even at As(V) concentrations lower than 10 μg L-1, the MACF exhibited a considerably high adsorption capacity to As(V), whereas the RACF was ineffective even at an As(V) concentration ten times higher to 10 μg L-1. The MACF was able to reduce As(V) concentration below its maximum contaminant level regulated by the US EPA for drinking water in a wide pH range without formation of the more poisonous As(III). Kinetic experiments indicated that the diffusion of As(V) within the pores of the MACF was more rapid than that of the RACF and that the surface reaction was the dominant step in the adsorption of As(V) onto the MACF. Compared with the RACF, the MACF had a wider applicable pH range from 2 to 8 for the As(V) uptake. Besides enhanced As(V) uptake, the MACF maintained its high adsorption capability to organic contaminants, such as phenol and humic acid. © 2009 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/carbonen_HK
dc.relation.ispartofCarbonen_HK
dc.subjectAdsorption capability-
dc.subjectAdsorption capacities-
dc.subjectArsenic removal-
dc.subjectAs removal-
dc.subjectDrinking water-
dc.titlePreparation and evaluation of a magnetite-doped activated carbon fiber for enhanced arsenic removalen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0008-6223&volume=48&issue=1&spage=60&epage=67&date=2010&atitle=Preparation+and+evaluation+of+a+magnetite-doped+activated+carbon+fiber+for+enhanced+arsenic+removal-
dc.identifier.emailLi, Xy:xlia@hkucc.hku.hken_HK
dc.identifier.authorityLi, Xy=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.carbon.2009.08.030en_HK
dc.identifier.scopuseid_2-s2.0-70350026666en_HK
dc.identifier.hkuros178449en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70350026666&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume48en_HK
dc.identifier.issue1en_HK
dc.identifier.spage60en_HK
dc.identifier.epage67en_HK
dc.identifier.isiWOS:000272018800009-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhang, S=7409371575en_HK
dc.identifier.scopusauthoridLi, Xy=26642887900en_HK
dc.identifier.scopusauthoridChen, JP=25649179800en_HK
dc.identifier.citeulike5645155-

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