title: Water Treatment Residuals and Scrap Tire Rubber as Green Sorbents for Removal of Stormwater Metals.
abstract: Bench scale tests were performed to evaluate two recycled wastes, water treatment residuals (WTR) and scrap tire rubber (STR), for adsorption of selected metals from urban stormwater, and assess their release from used sorbents. Aluminum-WTR alone could rapidly and effectively remove Cu, Pb, and Zn, while STR alone continuously released Zn accompanied with Cu and Pb adsorption. Zn leaching from STR was significantly reduced in the presence of WTR. Very little metals released from used combined adsorbents in NaNO3 solution, and only part of them were extracted with EDTA (a strong chelating agent), suggesting that metal release is not a concern in a typical stormwater condition. A combination of WTR and STR is a new, effective method for mitigation of urban stormwater metals-WTR can inhibit the STR leaching, and STR improves the hydraulic permeability of WTR powders, a limiting factor for stormwater flow when WTR is used alone.
authors.affiliation: Department of Earth and Environmental Studies, Montclair State University, CELS 220, 1 Normal Ave., Montclair, New Jersey 07043, USA.
authors.forename: Yang
authors.initials: Y
authors.lastname: Deng
authors.forename: Ciapha
authors.initials: C
authors.lastname: Morris
authors.forename: Sudipta
authors.initials: S
authors.lastname: Rakshit
authors.forename: Edward
authors.initials: E
authors.lastname: Landa
authors.forename: Pravin
authors.initials: P
authors.lastname: Punamiya
authors.forename: Dibyendu
authors.initials: D
authors.lastname: Sarkar
mesh_terms: D000327:Adsorption; D055772:Green Chemistry Technology / Q000379:methods*; D008670:Metals / Q000737:chemistry*; D012408:Rubber / Q000737:chemistry*; D062611:Solid Waste / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry*
chemical_list: D008670:Metals; D062611:Solid Waste; D014874:Water Pollutants, Chemical; D012408:Rubber