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  DOI Prefix   10.20431


 

International Journal of Research in Environmental Science
Volume 1, Issue 2, 2015, Page No: 48-59

Heavy Metal Contamination in Soils in Enyigba Pb & Zn Mines District, South Eastern Nigeria Using Metal Enrichment and Pollution Indices

Nnabo Paulinus N.

Department of Geology, Ebonyi State University, Abakaliki, Nigeria.

Citation : Nnabo Paulinus N., Heavy Metal Contamination in Soils in Enyigba Pb & Zn Mines District, South Eastern Nigeria Using Metal Enrichment and Pollution Indices International Journal of Research in Environmental Science 2015,1(2) : 48-59

Abstract

Twelve {12} soil samples were collected from the Pb - Zn mining district of Enyigba, in the Abakaliki area of south-eastern Nigeria and analyzed for As, Cd, Cu, Pb, Zn, Ni, Co, Mn, Ca and pH. The physico-chemical analyses show that pH is fairly acidic to neutral (5.3-7.0) resulting from the dissolution of the sulphide ore waste dump into the soil of the area. The heavy metal mean trend indicates that As > Cd > Co > Mn > Cu > Ni > Pb > Zn. These variations observed for the heavy metals suggest that both geologic and anthropogenic activities may be responsible for their distribution. Soil contamination is assessed on the basis of metal enrichment index (MEI) and metal pollution index (MPI). The results of the metal enrichment index show that the value for Cd is extremely high and moderate for Cu while the values for As, Pb and Zn are low. The enrichment of these metals made very significant contribution to moderate to very high pollution in the area based on metal pollution index.


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