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Removal of Selected Endocrine Disrupting Chemicals and Personal Care Products in Surface Waters and Secondary Wastewater by Ozonation

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Abstract:

This study investigated the removal of parabens, N,N-diethyl-m-toluamide (DEET), and phthalates by ozonation. The second-order rate constants for the reaction between selected compounds with ozone at pH 7 were of (2.2 ±0.2) × 106 to (2.9 ±0.3) × 106 M−1/s for parabens, (2.1 ± 0.3) to (3.9 ±0.5) M−1/s for phthalates, and (5.2 ±0.3) M−1/s for DEET. The rate constants for the reaction between selected compounds with hydroxyl radical ranged from (2.49 ±0.06) × 109 to (8.5 ±0.2) × 109 M−1/s. Ozonation of selected compounds in secondary wastewater and surface waters revealed that ozone dose of 1 and 3 mg/L yielded greater than 99% depletion of parabens and greater than 92% DEET and phthalates, respectively. In addition, parabens were found to transform almost exclusively through the reaction with ozone, while DEET and phthalates were transformed almost entirely by hydroxyl radicals (·OH).

Keywords: DEET; hydroxyl radical; ozone; parabens; phthalates

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143011X12989211841179

Publication date: August 1, 2011

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  • 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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