Passive sampling methods for contaminated sediments: risk assessment and management

Integrated Environmental Assessment and Management
Marc S GreenbergThomas F Parkerton

Abstract

This paper details how activity-based passive sampling methods (PSMs), which provide information on bioavailability in terms of freely dissolved contaminant concentrations (Cfree ), can be used to better inform risk management decision making at multiple points in the process of assessing and managing contaminated sediment sites. PSMs can increase certainty in site investigation and management, because Cfree is a better predictor of bioavailability than total bulk sediment concentration (Ctotal ) for 4 key endpoints included in conceptual site models (benthic organism toxicity, bioaccumulation, sediment flux, and water column exposures). The use of passive sampling devices (PSDs) presents challenges with respect to representative sampling for estimating average concentrations and other metrics relevant for exposure and risk assessment. These challenges can be addressed by designing studies that account for sources of variation associated with PSMs and considering appropriate spatial scales to meet study objectives. Possible applications of PSMs include: quantifying spatial and temporal trends in bioavailable contaminants, identifying and evaluating contaminant source contributions, calibrating site-specific models, and, improvi...Continue Reading

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Citations

Dec 1, 2015·Environmental Science & Technology·Kees BooijPaul Whitehouse
Oct 22, 2013·Integrated Environmental Assessment and Management·Thomas F Parkerton, Keith A Maruya
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Apr 5, 2017·The Science of the Total Environment·Lane G TidwellKim A Anderson

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