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Development of a Passive, in Situ, Integrative Sampler for Hydrophillic Organic Contaminants in Aquatic Environments

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Abstract:Until recently, hydrophobic, bioconcentratable compounds have been the primary focus of most environmental organic contaminant investigations, There is an increasing realization that a holistic hazard assessment of complex environmental contaminant mixtures requires data on the concentrations of hydrophilic organic contaminants as well. This group of compounds includes a wide variety of chemicals, including potentially endocrine disrupting and estrogenic contaminants which have been shown to contribute to numerous abnormalities such as impaired reproduction in aquatic organisms exposed in environmental waters. To address this issue, we developed a passive, in situ, sampling device (the Polar Organic Chemical Integrative Sampler or POCIS) which integratively concentrates trace levels of complex mixtures of hydrophilic environmental contaminants, enables the determination of their time-weighted average water concentrations and provides a screening assessment of the toxicological significance of the complex mixture of waterborne contaminants. Using a prototype sampler (effective membrane sampling surface area = 18.2 cm 2) linear uptake of selected herbicides and pharmaceuticals was observed for up to 56 days. Estimation of the ambient water concentrations of chemicals of interest is achieved by using appropriate uptake models and determination of POCIS chemical sampling rates.
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Citation:Alvarez, D. A., J. D. Petty, J. N. Huckins, T. Joneslepp, D. T. Getting, and S. E. Manahan. Development of a Passive, in Situ, Integrative Sampler for Hydrophillic Organic Contaminants in Aquatic Environments. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Environmental Toxicology & Chemistry, Pensacola, FL, 23(7):1640-1648, (2004).
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Environmental Chemistry Branch
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Product Type: Journal
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Published: 06/22/2004
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Related Entries:
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Bullet Item Addressing Emerging Issues in Water Quality Through Environmental Chemistry
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