Research Progress in Area 2 方向 ( 二 ) 課題進展 115 Abstract Estuarine pollution is a global problem and is increasing in highly populated coastal areas where industries are often collocated near sites of intensive aquaculture for seafood. Multiple lines of evidence, comprising chemical measures of contaminant bioavailability (stressor) and biological measures of exposure, uptake and effects to aquatic organisms (receptors) are required to validate remediation has adequately occurred. There is an increasing range of advanced tools available for the stressor and receptor components of assessments, but many of these have not yet been adequately applied and tested. The proposed project will develop and evaluate methods for the assessment of pollution risks in coastal marine environments, with a particular focus on guideline concentrations for contaminants and in situ passive sampling to assess contaminant bioavailability. Research Activities and Progress • The toxicity of perfluorooctane sulfonic acid (PFOS)-contaminated sediments to benthic estuarine/marine organisms was assessed, and chronic effects to 11 species used in a species sensitivity distribution to derive a guideline that can be used for risk assessment; • A newly-developed multi-metal stableisotope-enriched (MIE) bioassay was evaluated using lter-feeding clams to quantify metal bioavailability changes during sediment resuspension. Key Findings • Chronic effects of PFOS to benthic organisms and partitioning (Kd) to organic carbon (OC) were used to calculate a screening value of 60 μg/kg PFOS (normalized to 1% OC); • The MIE bioassay provides a new tool for directly assessing metal bioavailability in sediments, and is amenable for use in in situ assessments. Research Output Publication 3 Trained personnel 2 Demonstrating Contaminated Sediment Management Strategies using Advanced Assessment Tools across Multiple-Lines of Evidence Dr. Stuart Simpson Commonwealth Scientific and Industrial Research Organization Fig 1. Benthic toxicity tests measuring lethal and sublethal effects (e.g., top right) and sediment-water partitioning (bottom right) were used to derive a sediment quality guideline for PFOS. (Simpson et al. 2021 Sci. Total Environ. https://doi.org/ /j.scitotenv.2021.146008)
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