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
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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 group
Abstract
The aim of this study was to carry out a bioaccessibility-based risk
assessment of polycyclic aromatic hydrocarbons (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 bioaccessible
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 702–253,922 ng g¡1
and 92–760 ng g¡1 for total and bioaccessible PAHs, respectively. For
persons involved with activities at these sites no health risks were
observed, based on bioaccessibility 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 bioaccessible 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
Bioaccessibility; fed organic estimation human simulation test method; polycyclic aromatic hydrocarbons; risk assessment
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.