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Evaluation of the Adsorption Potential of Synthesized Anatase Nanoparticles for Arsenic Removal

Published online by Cambridge University Press:  08 March 2011

Z. Özlem Kocabaş  and
Yuda Yürüm
Z. Özlem Kocabaş
Affiliation:
Faculty of Natural Science and Engineering, Sabanci University, Orhanlı 34956 Tuzla, Istanbul/Turkey
Yuda Yürüm
Affiliation:
Faculty of Natural Science and Engineering, Sabanci University, Orhanlı 34956 Tuzla, Istanbul/Turkey
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Abstract

Titanium dioxide has been extensively tested in environmental applications, especially in separation technologies. In the present study, anatase nanoparticles were synthesized by using a sol-gel method, and batch adsorption experiments were carried out to analyze arsenic removal capacity of the anatase nanoparticles from water. The maximum arsenic removal percentages were found ~ 84 % for As(III) at pH 8 and ~98% for As(V) at pH 3, respectively, when 5 g/l anatase nanoparticles were used at an initial arsenic concentration of 1 mg/l. The results of the sorption experiments, which take into consideration the effects of equilibrium concentration on adsorption capacity, were analyzed with two popular adsorption models, Langmuir and Freundlich models. From the comparison of R2 values, the adsorption isotherm for As(III) was fitted satisfactorily well to the Langmuir equation (R2 > 0.996) while the adsorption behavior of As(V) on anatase nanoparticles was described better with Freundlich equation (R2 > 0.991). This study proposes the potential adsorbent material for water which is contaminated with arsenic species.

Keywords

sol-geladsorptionAs
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1317: Symposium RR – Interdisciplinary Approaches to Safe Nanotechnologies , 2011 , mrsf10-1317-rr04-09
Copyright
Copyright © Materials Research Society 2011

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