Bio-accessibility based risk assessment of PAHs in soils from sites of different anthropogenic activities in Lagos, Nigeria using the Fed Organic Estimation Human Simulation Test method
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Date
2018-07-12
Authors
Adetunde, O. T.
Mills, G. A.
Olayinka, K. O.
Alo, B. I.
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor and Francis
Abstract
The aim of this study was to carry out a bio-accessibility based risk assessment of polycyclic
aromatic hydrocarbon (PAHs) in soils from sites of different anthropogenic activities in Lagos,
Nigeria. Using an in vitro gastrointestinal model – Fed Organic Estimation Human Simulation Test
method (FOREShT)), the concentration of bio-accessible 16 priority US Environmental Protection
Agency (USEPA) PAHs in soils were determined. Total concentration of 16 priority USEPA PAHs
was also determined. The concentration range was 702 to 253,922 ng g-1 and 92-760 ng g-1 for total
and bio-accessible PAHs respectively. For persons involved with activities at these sites no health
risk were observed, based on bio-accessibility values of PAHs. Mean daily intake of PAHs from
these soils were below the oral mean daily intake threshold for PAHs in food. Also, overall
estimated theoretical cancer risk (2.5 × 10-09, 6.5 × 10-07, 5.5 × 10-10, 2.7 × 10-09, 6.5 × 10-10, 9.5 ×
10-10, 2.0 × 10-09 and 4.1 × 10-07 for the eight sites based on their bio-accessible concentration) for
exposure to PAHs in surface soils were below the health guidelines for extreme (1 × 10-04) and
normal (1 × 10-06) exposures.
Description
Keywords
Research Subject Categories::NATURAL SCIENCES::Chemistry::Analytical chemistry::Separation methods , Bio-accessibility , Polycyclic Aromatic Hydrocarbons , Risk assessment , Fed Organic Estimation Human Simulation Test method
Citation
Adetunde, O. T., Mills, G. A., Olayinka, K. O., & Alo, B. I. (2018). Bioaccessibility-based risk assessment of PAHs in soils from sites of different anthropogenic activities in Lagos, Nigeria using the fed organic estimation human simulation test method. Soil and Sediment Contamination: An International Journal, 27(6), 501-512.