DGT Passive Sampling for Quantitative in Situ Measurements of Compounds from Household and Personal Care Products in Waters

Environmental Science & Technology
Wei ChenKevin C Jones

Abstract

Widespread use of organic chemicals in household and personal care products (HPCPs) and their discharge into aquatic systems means reliable, robust techniques to monitor environmental concentrations are needed. The passive sampling approach of diffusive gradients in thin-films (DGT) is developed here and demonstrated to provide in situ quantitative and time-weighted average (TWA) measurement of these chemicals in waters. The novel technique is developed for HPCPs, including preservatives, antioxidants and disinfectants, by evaluating the performance of different binding agents. Ultrasonic extraction of binding gels in acetonitrile gave good and consistent recoveries for all test chemicals. Uptake by DGT with HLB (hydrophilic-lipophilic-balanced) as the binding agent was relatively independent of pH (3.5-9.5), ionic strength (0.001-0.1 M) and dissolved organic matter (0-20 mg L-1), making it suitable for applications across a wide range of environments. Deployment time and diffusion layer thickness dependence experiments confirmed DGT accumulated chemicals masses are consistent with theoretical predictions. The technique was further tested and applied in the influent and effluent of a wastewater treatment plant. Results were com...Continue Reading

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Citations

Jul 2, 2019·International Journal of Phytoremediation·Melanie L Hedgespeth, Elizabeth Guthrie Nichols
Jul 14, 2020·Environment International·Chang-Er ChenAndrew J Sweetman
Oct 21, 2020·Environmental Science & Technology·Kunfu PiPhilippe Van Cappellen
May 9, 2019·Journal of Agricultural and Food Chemistry·Yanying LiHao Zhang

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