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Assessment of Potentially Toxic Elements Pollution and Human Health Risk in Soil of Ilesha Gold Mining Site, Southwest Nigeria

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Journal of the Geological Society of India

Abstract

The paper presents results of research to determine the health risk of potentially toxic elements (PTEs) in soils of gold mining area in Ilesha, Southwestern Nigeria. Eighteen top soil samples were collected and analysed for PTEs using ICPMS. The pollution level in soils were assessed using pollution load index (PLI) and potential ecological risk index (PERI). The human health risk was assessed using hazard index (HI), non-carcinogenic risk index and carcinogenic risk index. All the PTEs were higher than crustal average values except Fe and follow the order Mn > Ba > Cr > Zn > Cu > Ni > Pb > Co >Fe > As > Cd. The soil samples can be classified as unpolluted to moderately polluted (0.18-1.23) and low risk (15.28-94.24) based on PLI and PERI respectively. The values of hazard Index (HI) calculated for child and adult population for all the pathways were <1 and pose no obvious non carcinogenic risk to the population except for ingestion pathway where 33% of the samples showed value >1 in child population. As, Co, Cd and Pb constituted high cancer risk in the study area with child at higher risk than adult. The Total Cancer Risk (TCR) in the study area based on all the pathways ranges between 0.19 -3.86 and 0.18-3.58 for child and adult respectively and the ingestion route seems to be the major contributor to excess lifetime cancer risk followed by the dermal pathway.

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Authors and Affiliations

  1. Department of Geosciences, Ibadan, Nigeria

    A. M. Odukoya & S. B. Olobaniyi

  2. Department of Chemistry, University of Lagos, Lagos, Nigeria

    T. O. Oluseyi

Authors
  1. A. M. Odukoya
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  2. S. B. Olobaniyi
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  3. T. O. Oluseyi
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Correspondence to A. M. Odukoya.

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Odukoya, A.M., Olobaniyi, S.B. & Oluseyi, T.O. Assessment of Potentially Toxic Elements Pollution and Human Health Risk in Soil of Ilesha Gold Mining Site, Southwest Nigeria. J Geol Soc India 91, 743–748 (2018). https://doi.org/10.1007/s12594-018-0933-7

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  • DOI: https://doi.org/10.1007/s12594-018-0933-7

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