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

3rd International Conference on Advances in Environment Research

生态环境科学;地球科学

Anake, Winifred U.^1 ; Ana, Godson R.E.E.^2 ; Williams, Akan B.^1 ; Fred-Ahmadu, Omowunmi H.^1 ; Benson, Nsikak U.^1

Analytical and Environmental Chemistry Unit, Department of Chemistry, Covenant University, Km 10 Idiroko Road, Ota, Ogun State, Nigeria^1

Department of Environmental Health Sciences, University of Ibadan, Ibadan, Nigeria^2

关键词: Chemical extractions;    Environmental Protection Agency's;    Exchangeable fraction;    Inductively coupled plasma mass spectrometries (ICPMS);    Inhalation exposure;    Metal bioavailability;    Sequential extraction procedure;    Southwestern nigeria;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/68/1/012005/pdf
DOI  :  10.1088/1755-1315/68/1/012005

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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 (ICP-MS). Results reveal Cr and Cu as the most dominant exchangeable fraction metals, indicating possibility of their being readily soluble once PM2.5is 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 1×10-6to 1×10-4. The hazard index values for all studied trace metals suggest significant potential for non-carcinogenic 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.