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

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:375

Article

Ntim, Susana Addo¹  Mitra, Somenath¹ 

[1] New Jersey Inst Technol, Dept Chem & Environm Sci, Newark, NJ 07102 USA

关键词: Arsenic;    Carbon nanotubes;    Zirconia;    Water;    Adsorption;    Kinetics;   

DOI  :  10.1016/j.jcis.2012.01.063

来源: Elsevier

【 摘 要 】

The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO2) is presented. The MWCNT-ZrO2 with 4.85% zirconia was effective in meeting the drinking water standard levels of 10 mu g L-1. The absorption capacity of the composite were 2000 mu g g(-1) and 5000 mu g g(-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-ZrO2 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-ZrO2 was that the adsorption capacity was not a function of pH. (C) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

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