A review of non-exhaustive chemical and bioavailability methods for the assessment of polycyclic aromatic hydrocarbons in soil

Lal, Vincent, Peng, Cheng and Ng, Jack (2015) A review of non-exhaustive chemical and bioavailability methods for the assessment of polycyclic aromatic hydrocarbons in soil. Environmental Technology and Innovation, 4 159-167. doi:10.1016/j.eti.2015.07.001


Author Lal, Vincent
Peng, Cheng
Ng, Jack
Title A review of non-exhaustive chemical and bioavailability methods for the assessment of polycyclic aromatic hydrocarbons in soil
Journal name Environmental Technology and Innovation   Check publisher's open access policy
ISSN 2352-1864
Publication date 2015-10-01
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/j.eti.2015.07.001
Open Access Status Not Open Access
Volume 4
Start page 159
End page 167
Total pages 9
Place of publication Amsterdam, NX, Netherlands
Publisher Elsevier
Language eng
Subject 2300 Environmental Science
1111 Soil Science
1110 Plant Science
Abstract Current environmental regulations relating to risk assessment for contaminated sites are often set assuming that the contaminant is 100% bioavailable. It is therefore not surprising that remediation of contaminated sites is very expensive and maybe it is unrealistic to achieve a "remediated state" under current regulatory guidelines using existing technologies. In fact the reality is that only a portion of the contaminant on site becomes available for absorption and goes into the systemic circulation. This article gives an overview of existing in vivo animal models that quantify oral bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soil. It also provides a summary of in vitro gastrointestinal extraction methodologies and some of the key factors influencing absorption of PAHs in soil. For innovation, it highlights that bioaccessibility values derived from in vitro studies still require validation from in vivo animal models to gain regulatory acceptance. Additionally, this review highlights the use of non-exhaustive chemical methodologies as a valuable tool to understanding the bioavailability process and behaviour of PAHs in soil.
Formatted abstract
Current environmental regulations relating to risk assessment for contaminated sites are often set assuming that the contaminant is 100% bioavailable. It is therefore not surprising that remediation of contaminated sites is very expensive and maybe it is unrealistic to achieve a “remediated state” under current regulatory guidelines using existing technologies. In fact the reality is that only a portion of the contaminant on site becomes available for absorption and goes into the systemic circulation. This article gives an overview of existing in vivo animal models that quantify oral bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soil. It also provides a summary of in vitro gastrointestinal extraction methodologies and some of the key factors influencing absorption of PAHs in soil. For innovation, it highlights that bioaccessibility values derived from in vitro studies still require validation from in vivo animal models to gain regulatory acceptance. Additionally, this review highlights the use of non-exhaustive chemical methodologies as a valuable tool to understanding the bioavailability process and behaviour of PAHs in soil.
Keyword Bioaccessibility
Bioavailability
Cyclodextrin
PAHs
Risk assessment
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Official 2016 Collection
National Research Centre for Environmental Toxicology Publications
 
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