Catch basin inserts are runoff-filters designed to be installed under an individual sewer grate with the goal of filtering particles and dissolved pollutants (e.g., nutrients and metals) from stormwater before entering a sewer system. Catch basin inserts usually consist of a sediment trap to remove particles, followed by various sorption media filters designed for various pollutants. Although catch basin inserts have been used widely as sediment traps near construction sites, they have not received a lot of attention as a potential pre-treatment step before introducing polluted stormwater into various green stormwater infrastructure (GSI). In this study, we are using the MnO<sub>2</sub> impregnated polypropylene fibers as the sorbent material to test its efficacy in treating various urban stormwater pollutants. Runoff water samples were collected and the concentrations of the potential contaminants were evaluated. Chemical sorption kinetics were evaluated by conducting batch sorption experiments. Various amounts of the sorbent material were added to 50 ml centrifuge tubes containing synthetic runoff and measured for concentration over time. The dosage of the sorbent material was varied in batch experiments for a better understanding of the sorption process. Different models (e.g., Freundlich, Langmuir, Temkin) were used to interpret the kinetics of the sorption process. The effect of temperature on adsorption kinetics was also evaluated. All measurements were in duplicate to reduce error.

Evaluating the efficacy of MnO<sub>2</sub> impregnated polypropylene fiber as a sorbent material to treat urban stormwater runoff

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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Evaluating the efficacy of MnO2 impregnated polypropylene fiber as a sorbent material to treat urban stormwater runoff

Evaluating the efficacy of MnO₂ impregnated polypropylene fiber as a sorbent material to treat urban stormwater runoff