The Effect of Zeolite and TSP on Speciation of Pb, Zn and Cd in Mine Waste

Document Type : Research Article

Authors

1 Department of Soil Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad

2 Agricultural and Natural Resources Research Center of Zanjan Province

Abstract

Abstract
With increasing population, Mine activities for metal proceeding are also increasing, so environment will be influenced by contaminant especially heavy metals. In situ immobilization of heavy metals using inexpensive amendments is considered as a simple and cost-effective approach for reducing heavy metal contamination. In this research we used sequential extraction for assessing reduction in availability of heavy metal in lead and zinc mine waste (bama mine around Isfahan). The effects of chemical amendments consist of 3 level of Zeolite 0 (Z1), 5% (Z2) and 10% (Z3) and 3 level of Triple Super Phosphate 0 (P1), 0.25% (P2) and 0.5% (P3) on speciation of Pb, Zn and Cd was investigated by sequential extraction based on tesier method. Total concentration of Pb, Zn and Cd were 2300, 16500 and 27.4 mgkg-1 d.m. Result showed that TSP transform heavy metal specially Pb from exchangeable and carbonate fractions to residual and organic, sulfides fractions. Zeolite also transformed Pb and Zn from carbonate fraction to residual fraction. But eth effect of phosphorous was superior to zeolite. There was no interaction between Zeolite and TSP.

Keywords: Soil pollution, Heavy metals, Fractionation, In situ immobilization
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History

  • Receive Date: 23 May 2011
  • Accept Date: 23 May 2011
  • First Publish Date: 23 May 2011

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