TY - JOUR
T1 - Water treatment residuals and scrap tire rubber as green sorbents for removal of stormwater metals
AU - Deng, Yang
AU - Morris, Ciapha
AU - Rakshit, Sudipta
AU - Landa, Edward
AU - Punamiya, Pravin
AU - Sarkar, Dibyendu
PY - 2016/6
Y1 - 2016/6
N2 - 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.
AB - 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.
KW - Adsorption
KW - Copper
KW - Heavy metals
KW - Lead
KW - Scrap tire rubbers
KW - Urban stormwater runoff
KW - Water treatment residuals
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=84974785045&partnerID=8YFLogxK
U2 - 10.2175/106143016X14504669768697
DO - 10.2175/106143016X14504669768697
M3 - Article
C2 - 27010486
AN - SCOPUS:84974785045
SN - 1061-4303
VL - 88
SP - 500
EP - 509
JO - Water Environment Research
JF - Water Environment Research
IS - 6
ER -
