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     Research Journal of Environmental and Earth Sciences


Geochemical Distribution of Heavy Metals in Soil around Itakpe Iron-ore Mining Area-a Statistical Approach

E.G. Ameh
Earth Sciences Department, Kogi State University, P.M.B 1008, Anyigba, Nigeria
Research Journal of Environmental and Earth Sciences  2014  3:118-126
http://dx.doi.org/10.19026/rjees.6.5750  |  © The Author(s) 2014
Received: December 31, 2012  |  Accepted: February 18, 2013  |  Published: March 20, 2014

Abstract

This study becomes imperative in order to determine the degree of soil contamination due to iron-ore mining. Ten surface soil samples were collected and analyzed for major ions and heavy metals during the dry season. Average cation concentration observed was: Ca>K>Na>Mg while the heavy metal average were: Fe>Ni>Cd>Zn>Cu>Pb. The regression analysis result indicates generally weak associations among the variables though moderate relationships were observed between Ni-K, Pb-Mg, Pb-Fe and Zn-Cu. Five indices were used for data evaluation: Anthropogenic Factor (AF), Index of Geo-accumulation (Igeo), Enrichment Factor (EF), Contamination Factor (CF) and Pollution Load Index (PLI). Except EF which gave the order of enrichment: Fe>Ni>Pb>Cu>Zn>Cd, AF, Igeo and CF reveals this order of contamination: Fe>Pb>Ni>Cu>Zn>Cd. PLI shows that the locations experienced various degrees of deterioration in this order: ITK14>ITK10>ITK04>ITK02> ITK01>ITK07>ITK06>ITK05 (ITK17) >ITK03. R-mode factor analysis suggests that factor one is due to natural and anthropogenic influence while factors two and four are due to natural processes. Factor three points to anthropogenic origin. Q mode factor reveals anthropogenic factor as the dominant influence. R-mode cluster indicates that cluster four is anthropogenic and three natural while clusters two and three are a mixture of natural and anthropogenic sources. Q-mode cluster analysis shows that clusters one, two and three are directly influenced by iron ore mining while four were not. The soils around Itakpe iron ore have experienced various degrees of contamination particularly with reference to Fe, Pb and Ni and locations ITK14, ITK10, ITK04, ITK02 and ITK01. This area needs to be reclaimed and soils treated appropriately while further and a detailed study on the ecosystem is recommended.

Keywords:

Contamination factor, enrichment factor, index of geo-accumulation, Itakpe, pollution load index,


References


Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.

ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
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