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Determination of organic pollutants in land applied municipal wastewater sludges by toxicity characteristic leaching procedure (TCLP) and extraction procedure toxicity test (EP)

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Triplicate wastewater sludge samples, from three small municipal facilities that received no industrial inputs, were analyzed by the Extraction Procedure Toxicity Test (EP) and Toxicity Characteristic Leaching Procedure (TCLP). These tests evaluate the potential for organic and inorganic chemicals to leach from the sludge. Six surrogate chemicals were spiked into the sludges to monitor recoveries of specific chemicals by the two procedures. The recoveries for the surrogate chemical spiked into the sludges were low (0.1-33%) and variable for both tests. EP and TCLP tests performed similarly in that both tests yielded highly variable results in terms of the number of chemicals and the concentrations detected in the replicate samples. Only four organic pollutants (p-cresol, dichlorodimethoxybenzene, dimethylpentanol, and tetramethylbutylphenol), at microgram per kilogram concentrations, were identified in the sludge samples. Based on this research, few organic pollutants appear to be leached from municipal-only wastewater sludges.
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Keywords: extraction procedure toxicity test; leaching; organic pollutants; pesticides; sludge; toxicity characteristic leaching procedure

Document Type: Research Article

Publication date: 1993-07-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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