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REMOVAL OF ZN(II) FROM AQUEOUS SOLUTION BY USING SMECTITE-BEARING SOIL

AUTHOR/S: Y. ASCI
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 2, 407-412 pp

ABSTRACT

In this study, removal zinc from aqueous solution was studied using smectite-bearing soil. The effects of initial Zn(II) concentration, pH, adsorbent dosage, and contact time were investigated. When the initial concentration of Zn(II) was incresed from 0.7 to 3.77 mM, the Zn(II) removal efficiency decreased from 100% to 90.7%. To determine the effect of pH on the adsorption efficiency of Zn(II), pH was varied between 3.0 and 7.0. The sorption efficiency of Zn(II) onto soil seems to be independent of pH with in studied pH range and initial Zn(II) concentration. When soil was treated with 1.23 mM Zn(II) solution, the sorption efficiency was determined as 96% at all pH values tested. As the dosage of soil was increased from 0.3 g to 1.5 g, the Zn(II) removal efficiency was almost constant at higher dosages than 0.5 g. Finally, the ability of soil to remove Zn(II) from aqueous solutions has been investigated in batch reactor with a maximum contact time of 180 min.

Keywords: Adsorption, Zn(II), smectite-bearing soil