Integrated ecological risk assessment of dioxin compounds

Abstract

Current ecological risk assessment (ERA) schemes focus mainly on bioaccumulation and toxicity of pollutants in individual organisms. Ecological models are tools mainly used to assess ecological risks of pollutants to ecosystems, communities, and populations. Their main advantage is the relatively direct integration of the species sensitivity to organic pollutants, the fate and mechanism of action in the environment of toxicants, and life-history features of the individual organism of concern. To promote scientific consensus on ERA schemes, this review is intended to provide a guideline on short-term ERA involving dioxin chemicals and to identify key findings for exposure assessment based on policies of different agencies. It also presents possible adverse effects of dioxins on ecosystems, toxicity equivalence methodology, environmental fate and transport modeling, and development of stressor-response profiles for dioxin-like chemicals.

Health risk assessments of arsenic and toxic heavy metal exposure in drinking water in northeast Iran

“…Heavy metals and arsenic contamination in drinking water poses a serious threat to human life because of their toxicity, bio-accumulative nature, and persistence in the environment [1–3]. The heavy metals contaminate the groundwater and surface water through a natural process and anthropogenic activities (e.g., industrial, agricultural, mining, and traffic activities) [4, 5].…”

Risk assessment for handling hazardous substances within the European industry: Available methodologies and research streams

“…Tavakoly Sany et al. (2015), for example, gave a guideline on short‐term ecological risk assessment schemes involving dioxin chemicals and their effects on ecosystems. Frattini and Manning (2015) then defined an integrated environment and health risk assessment methodology (REHRA) based on the dramatic cyanide spill of Baia Mare (Romania).…”

An overview of detection techniques for monitoring dioxin-like compounds: latest technique trends and their applications

“…17,18 The most toxic congener for this class is 2,3,7,8-tetrachlorodibenzo-para-dioxin (TCDD) that is involved in several occupational activities and industrial accidents around the world. 17,18,20 Dioxin like compounds contain two benzene rings linked to two oxygen atoms and include of four to eight chlorine atom substitutions in the 2, 3, 7 and 8 positions. 17,18,20 Dioxin like compounds contain two benzene rings linked to two oxygen atoms and include of four to eight chlorine atom substitutions in the 2, 3, 7 and 8 positions.…”

“…This factor shows the potential of DLCs to induce activation of AhR related to the reference substance. 32 The more details about AhR-signaling pathways and mechanism actions of DLCs were recently discussed by Tavakoly Sany et al 20,33 A comparison of TEQ values (pg g À1 lipid weight) in agency food standards and selected foods is summarized in Table 2. [27][28][29][30] Whole activation of AhR receptors is expressed as TCDD toxic equivalent (TEQ) based on the AhR signaling assessment.…”