Lu, C.-C.C.-C.LuHsu, M.H.M.H.HsuLin, Y.-P.Y.-P.LinYI-PIN LIN2020-02-252020-02-252019https://scholars.lib.ntu.edu.tw/handle/123456789/463014Incinerating recycled aggregate (IRA) produced using bottom ash generated from the incineration of municipal solid wastes can be reused as construction materials and cement-based solidification/stabilization (S/S) can be employed to improve their environmental compatibility. Toxicity characteristic leaching procedure (TCLP) is commonly used to evaluate heavy metal leachability before reuse. However, the applicability of TCLP to IRA and their S/S products can be limited because of their alkaline nature which may cause underestimation of metal release. In this study, the leaching of heavy metals from an IRA and two S/S products, low-strength material (CLSM) and multi-functional regenerated concrete (MRC), were evaluated using TCLP, multi-final pH leaching test and EDTA-mediated TCLP. The results showed that TCLP results generally met the reuse standards. However, the results obtained from multi-final pH leaching test and EDTA-mediated TCLP showed exceedances of reuse standards for Pb and Cu when the final pH was < 5 or in the presence of> 7 mM EDTA. The results suggested that the reuse of IRA or S/S products requires further evaluation of their metal leachability in more harsh environmental conditions. Considering its simplicity, it is suggested that EDTA-mediated TCLP could be used for this purpose. © 2019 Elsevier B.V.EDTA; Heavy metal; Incinerating recycled aggregate; Solidification/stabilization; TCLP[SDGs]SDG11[SDGs]SDG12Aggregates; Alkalinity; Ash handling; Ethylenediaminetetraacetic acid; Heavy metals; Municipal solid waste; Recycling; Solidification; Waste incineration; Environmental compatibility; Environmental conditions; Heavy metal leachability; Recycled aggregates; Solidification/stabilization; TCLP; Tclp leaching tests; Toxicity characteristic leaching procedures; Leaching; cuprous ion; edetic acid; heavy metal; bottom ash; EDTA; environmental conditions; heavy metal; incineration; leaching; pH; solidification; stabilization; testing method; toxicity; acid precipitation; alkalinity; Article; bottom ash; chelation; controlled study; incineration; leaching; method detection limit; municipal solid wastejournal article10.1016/j.jhazmat.2019.01.0662-s2.0-85060326162https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060326162&doi=10.1016%2fj.jhazmat.2019.01.066&partnerID=40&md5=012e6f4ad7e3af7f986f3cac707135b2