Review of inorganic arsenic toxicity on avian wildlife
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This study focused on the assessment of ecological risk, specifically the assessment of risk to avian wildlife receptors at contaminated sites. A systematic review of published toxicological dose-response data for inorganic arsenic, as it relates to avian receptors, was completed. Using data extracted from published toxicological studies, a meta-analysis was performed which synthesized the data into a detailed toxicity profile relating exposure, as internalized dose, with effect size to provide a more holistic understanding of the dose-response relationship. A larger objective of this study was to advance the practice of developing decision criteria for defining toxicological effects thresholds beyond which adverse effects might occur. Ecological risk assessments (ERAs) for vertebrate species focus specifically on the potential for adverse effects to whole organisms and population-level consequences. Published reference values are prescribed by regulatory agencies for the assessment of risk under the ERA process. The avian/inorganic arsenic toxicity profile completed in this study provided a means to critically review select published reference values and highlight uncertainties that are inherent in the derivation of reference values.
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Darko, Godfred; Dodd, Matt; Nkansah, Marian Asantewah; Aduse-Poku, Yaw; Ansah, Eugene; Wemegah, David Dotse; Borquaye, Lawrence Sheringham (Cogent Environmental Science, 2017)The distribution, and ecological risks due to toxic metals in topsoils of an urban commercial centre of Kumasi metropolis were determined. Concentrations of heavy metals in the samples were initially screened using field ...
Human health risk and bioaccessibility of toxic metals in topsoils from Gbani mining community in Ghana Darko, Godfred; Boakye, Kwadwo Owusu; Nkansah, Marian Asantewaa; Gyamf, Opoku; Ansah, Eugene; Yevugah, Lily Lisa; Acheampong, Akwasi; Dodd, Matt (Journal of Health and Pollution, 2019)Background. Anthropogenic activities such as artisanal mining pose a major environmental health concern due to the potential for discharge of toxic metals into the environment. Objectives. To determine the distribution ...