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Chemical Speciation and Health Risk Assessment of Fine Particulate Bound Trace Metals Emitted from Ota Industrial Estate, Nigeria

Anake, W. U. and Ana, Godson R.E.E and Williams, Akan B. and Fred-Ahmadu, O.H. and Benson, N. U. (2017) Chemical Speciation and Health Risk Assessment of Fine Particulate Bound Trace Metals Emitted from Ota Industrial Estate, Nigeria. In: The 3rd International Conference on Advances in Environment Research.

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Abstract

In this study carcinogenic and non-carcinogenic health risk due to exposure to PM2.5-bound trace metals from an industrial area in Southwestern Nigeria was estimated. A four-step chemical sequential extraction procedure was employed for the chemical extraction of arsenic (As), cadmium (Cd), chromium (Cr) copper (Cu), manganese (Mn), nickel (Ni), and zinc (Zn). Samples were analyzed using inductively coupled plasma mass spectrometry (ICPMS). Results reveal Cr and Cu as the most dominant exchangeable fraction metals, indicating possibility of their being readily soluble once PM2.5 is inhaled. Cd and Cr record the highest bioavailability index of 0.7. The cumulative lifetime cancer risks due to inhalation exposure for adults (4.25×10-2), children 1-6 years old (4.87×10-3), and children 6-18 years old (1.46×10-2) were found above Environmental Protection Agency’s acceptable range of 1×10-6 to 1×10-4. The hazard index values for all studied trace metals suggest significant potential for noncarcinogenic health risks to adults and children. The choice of chemical speciation as an essential tool in facilitating a better predictive insight on metal bioavailability and toxicity for immediate remediation action has been highlighted.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: carcinogenic, health risk, trace metals, cancer risks, toxic
Subjects: Q Science > QD Chemistry
Q Science > QR Microbiology
R Medicine > RA Public aspects of medicine
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mrs Aderonke Olufunke Asaolu
Date Deposited: 29 Aug 2017 15:24
Last Modified: 29 Aug 2017 15:24
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/8969

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