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Evaluation of the Adsorption Potential of Synthesized Anatase Nanoparticlesfor 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 inseparation technologies. In the present study, anatase nanoparticles were synthesized byusing a sol-gel method, and batch adsorption experiments were carried out to analyzearsenic removal capacity of the anatase nanoparticles from water. The maximum arsenicremoval 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 arsenicconcentration of 1 mg/l. The results of the sorption experiments, which take intoconsideration the effects of equilibrium concentration on adsorption capacity, wereanalyzed with two popular adsorption models, Langmuir and Freundlich models. From thecomparison of R2 values, the adsorption isotherm for As(III) was fittedsatisfactorily well to the Langmuir equation (R2 > 0.996) while theadsorption behavior of As(V) on anatase nanoparticles was described better with Freundlichequation (R2 > 0.991). This study proposes the potential adsorbent materialfor water which is contaminated with arsenic species.

Keywords

sol-geladsorptionAs

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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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