Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification

Document Type

Article

Publication Date

6-1-2012

Abstract

The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO 2) is presented. The MWCNT-ZrO 2 with 4.85% zirconia was effective in meeting the drinking water standard levels of 10μgL -1. The absorption capacity of the composite were 2000μgg -1 and 5000μgg -1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO 2 was that the adsorption capacity was not a function of pH. © 2012 Elsevier Inc..

Identifier

84858997811 (Scopus)

Publication Title

Journal of Colloid and Interface Science

External Full Text Location

https://doi.org/10.1016/j.jcis.2012.01.063

e-ISSN

10957103

ISSN

00219797

PubMed ID

22424815

First Page

154

Last Page

159

Issue

1

Volume

375

Grant

RC2 ES018810

Fund Ref

National Institute of Environmental Health Sciences

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