Development Of A Transport And Fate Model For Organic Micropollutants At A Stormwater Biofilter Site

Abstract

Biofiltration systems are increasingly being used for treatment of stormwater. But, in order to use them as effective stormwater management tools, it is important to understand their performance and model it. The developed model is based on (1) a typing bucket approach for water flow, and (2) advection/dispersion transport with chemical non-equilibrium two-site model of sorption, first-order decay and volatilisation for pollutant transport and fate. Model is tested against field data collected for three different organic micropollutants-atrazine, pentachlorophenol and chloroform at two biofilter cells. Parameters estimated from the study are in agreement with the available literature data, which makes the use of this model concept promising in regards of other types of organic pollutants.

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