Assessment of Potentially Toxic Elements Pollution and Human Health Risk in Soil of Ilesha Gold Mining Site, Southwest Nigeria.
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Date
2018
Authors
Odukoya, A.M
Olobaniyi, S.B
Oluseyi, T.O
Journal Title
Journal ISSN
Volume Title
Publisher
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.
Description
Keywords
pathway , toxic elements , health risk , pollution
Citation
Odukoya, A. M., Olobaniyi, S. B., & Oluseyi, T. O. (2018). Assessment of Potentially Toxic Elements Pollution and Human Health Risk in Soil of Ilesha Gold Mining Site, Southwest Nigeria. Journal of the Geological Society of India, 91(6), 743-748.