Oxidation of organic contaminants by manganese oxide geomedia for passive urban stormwater treatment systems.

摘要: To advance cost-effective strategies for removing trace organic contaminants from urban runoff, the feasibility of using manganese oxides as a geomedia amendment in engineered stormwater infiltration systems to oxidize was evaluated. Ten representative chemicals that have previously been detected were evaluated reactivity batch experiments with birnessite. With respect reactivity, could be classified as: highly reactive (e.g., bisphenol A), moderately diuron) and unreactive tris(2-chloro-1-propyl)phosphate). Bisphenol A diuron reacted birnessite produce suite products, including ring-cleavage products partially dechlorinated diuron. Columns packed oxide-coated sand used evaluate design parameters an system, necessary contact times effective treatment, well impacts matrix variables, such solution pH, concentration natural matter major anions cations. The oxide exhibited decreased when oxidized, especially presence divalent cations, bicarbonate, matter. Under typical conditions, are expected retain their 25 years.