Development of a Method to Estimate the Mass and Toxic Bioavailabilities of Pentachlorophenol during its Transport through Saturated Porous Media / Y. Dudal, L. Desch¿̐ưnes

Conference Author:: Environmental Toxicology and Risk Assessment: Science, Policy, and Standardization¿̐ưImplications for Environmental Decisions: Tenth Volume (10th : 2000 : Toronto, Ontario, Canada)
Physical Description:: 1 online resource (16 pages) : illustrations, figures, tables
Additional Creators:: Dudal, Y., Desch¿̐ưnes, L., American Society for Testing and Materials, and ASTM International

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Summary:

Bioavailability of organic contaminants in soil has recently been a focus of interest but a lack of knowledge of its behavior during contaminant transport through saturated porous media, such as aquifers, is observed. This research presents a method, based on a generally accepted definition of bioavailability, that quantifies mass and toxic bioavailabilities of organic contaminants during their transport in terms of bioavailability rates. Elutions of pentachlorophenol (PCP) were performed using inoculated laboratory columns at two different pore-water velocities and on two different media. Both PCP and the toxic response (Microtox) were monitored at the exit of the columns for quantification of the rates. Results show that the non-dimensional mass bioavailability rate decreased with increasing pore-water velocity (from 0.52 to 0.15) and with increasing retention (from 0.15 to 0.02). The non-dimensional toxic bioavailability rate decreased with increasing retention (from 0.59 to 0.22). Results indicate that this method shows a potential for quantifying contaminant bioavailability according to both outcomes: biodegradation and toxicity.

Dates of Publication and/or Sequential Designation:

Volume 2000, Issue 1403 (January 2000)

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ISBN:

9780803154483 (e-ISBN)
9780803128866
080312886X

Digital File Characteristics:

text file PDF

Bibliography Note:

Includes bibliographical references 33.

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Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2000. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.

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Mode of access: World Wide Web.

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ASTM International PDF Purchase price USD25.

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