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首页> 外文期刊>Environmental Science & Technology: ES&T >Stormwater Bioretention Cells Are Not an Effective Treatment forPersistent and Mobile Organic Compounds (PMOCs)
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Stormwater Bioretention Cells Are Not an Effective Treatment forPersistent and Mobile Organic Compounds (PMOCs)

机译：Stormwater Bioretention Cells Are Not an Effective Treatment forPersistent and Mobile Organic Compounds (PMOCs)

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:bioretention cells are a stormwater management technology intended toreduce the quantity of water entering receiving bodies. They are also used to reducecontaminant releases, but their performance is unclear for hydrophilic persistent andmobile organic compounds (PMOCs). We developed a novel eight-compartment one-dimensional (1D) multimedia model of a bioretention cell ("Bioretention Blues") andapplied it to a spike and recovery experiment conducted on a system near Toronto,Canada, involving PMOC benzotriazole and four organophosphate esters (OPEs).Compounds with (logDOC) (organic carbon-water distribution coefficients) 3.8 were mostly sorbed to the soil, where subsequent fate depended ontransformation. For compounds with 2.7 <= logDOC <= 3.8, sorption was sensitive to event size and compound-specificdiffusionparameters, with more sorption expected for smaller rain events and for compounds with larger diffusion coefficients. Volatilizationlosses were minimal for all compounds tested. Direct uptake by vegetation also played a negligible role regardless of the compounds'physicochemical properties. Nonetheless, model simulations showed that vegetation could play a role by increasing transpiration,thereby increasing sorption to the bioretention soil and reducing PMOC release. Model results suggest design modifications tobioretention cells

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