Removal of trace arsenic to meet drinking water standards using iron oxide coated multiwall carbon nanotubes

Document Type

Article

Publication Date

5-12-2011

Abstract

This study presents the removal of trace level arsenic to meet drinking water standards using an iron oxide-multiwalled carbon nanotube (Fe-MWCNT) hybrid as a sorbent. The synthesis was facilitated by the high degree of nanotube functionalization using a microwave-assisted process, and a controlled assembly of iron oxide was possible where the MWCNT served as an effective support for the oxide. In the final product, 11 % of the carbon atoms were attached to Fe. The Fe-MWCNT was effective in arsenic removal to below the drinking water standard levels of 10 μg·L-1. The absorption capacity of the composite was 1723 μg·g-1 and 189 μg·g-1 for As(III) and As(V), respectively. The adsorption of As(V) on Fe-MWCNT was faster than that of As(III). The pseudosecond-order rate equation was found to effectively describe the kinetics of arsenic adsorption. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. © 2011 American Chemical Society.

Identifier

79956111894 (Scopus)

Publication Title

Journal of Chemical and Engineering Data

External Full Text Location

https://doi.org/10.1021/je1010664

e-ISSN

15205134

ISSN

00219568

First Page

2077

Last Page

2083

Issue

5

Volume

56

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