Removal of Zn2+ and Cr6+from waste water Samples, using natural Iranian (Aftar) Zeolites

Subject Areas : Journal of Chemical Health Risks

S. Peyravi,, ¹ , R. Zahiri ² , K. Moradi Hersini ³

1 - School of Earth Sciences, Damghan University, Damghan, Iran
2 - School of Earth Sciences, Damghan University, Damghan, Iran
3 - School of Earth Sciences, Damghan University, Damghan, Iran

Received: 2011-09-28 Accepted : 2018-10-29 Published : 2011-09-28

Keywords: zeolite, chromium, Zinc, Aftar,

Abstract :

This paper concerns the removal of Zn2+ and Cr6+ ions from waste water using a naturally occurring zeolite from semnan region in Iran. A continuous fixed-column study was carried out by using zeolite as a low-cost adsorbent for the removal of Zn2+ and Cr6+ ions from aqueous solution under the effect of various process parameters such as, grain size and time. The efficiency of removal is higher for Zn than Cr ions. The Zn2+ and Cr6+ ions uptake by zeolite increased with initial ions concentration and column height, but decreased as the flow rate increased. The adsorption capacity reached a maximum at grain size of 0.71mm.

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