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Type: Journal article
Title: Assessing health risks from pesticides in recycled water: a case study of augmentation of drinking water supplies in Perth, Western Australia
Author: Rodríguez, C.
Taylor, P.
Devine, B.
Van Buynder, P.
Weinstein, P.
Cook, A.
Citation: Human and Ecological Risk Assessment, 2012; 18(6):1216-1236
Publisher: Taylor & Francis
Issue Date: 2012
ISSN: 1080-7039
Statement of
Clemencia Rodríguez, Peter Taylor, Brian Devine, Paul Van Buynder, Philip Weinstein, and Angus Cook
Abstract: A characterization of pesticides in secondary treated effluent (STE) and a screening health risk assessment were conducted to evaluate potential health impacts of recycled water for potable reuse. Samples of STE were examined pre- and post-reverse osmosis (RO) treatment in two plants. Risk quotients (RQ) were estimated by expressing the maximum and median concentration as a function of the health value. Of 128 pesticides analyzed, 11 were detected in STE. Trifluralin was detected in 86.5% of the STE samples followed by metolachlor (67.6%), 2,4-D (50%), and propiconazole (42.5%). Metolachlor was the only pesticide detected post-RO in one sample (0.08 μg/L, limit of reporting = 0.05 μg/L). RQ(max) were all below health values in the STE with the exception of thiophanate methyl (RQ max = 2.4). RO was able to reduce the concentration of all pesticides below LOR. Median removal efficiency for RO ranged from 67.1% (atrazine) to 98.8% (2,4-D). The results indicate that, despite the detection of pesticides in STE, the impact on indirect potable reuse is negligible due to the low concentrations in STE and their subsequent removal during RO treatment. Implementation of risk management strategies to optimize safety and recommendations for a monitoring program are also discussed.
Keywords: water recycling
water quality
organic pollutants
indirect potable reuse
Rights: Copyright © Taylor & Francis Group, LLC
DOI: 10.1080/10807039.2012.725365
Appears in Collections:Aurora harvest 7
Ecology, Evolution and Landscape Science publications

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