title: Effect of Mass Proportion of Municipal Solid Waste Incinerator Bottom Ash Layer to Municipal Solid Waste Layer on the Cu and Zn Discharge from Landfill.
abstract: Municipal solid waste incinerator (MSWI) bottom ash is often used as the protection layer for the geomembrane and intermediate layer in the landfill. In this study, three sets of simulated landfills with different mass proportion of MSWI bottom ash layer to municipal solid waste (MSW) layer were operated. Cu and Zn concentrations in the leachates and MSW were monitored to investigate the effect of MSWI bottom ash layer on the Cu and Zn discharge from the landfill. The results showed that the Zn discharge was dependent on the mass proportion of MSWI bottom ash layer. The pH of landfill was not notably increased when the mass proportion of MSWI bottom ash layer to MSW layer was 1 : 9, resulting in the enhancement of the Zn discharge. However, Zn discharge was mitigated when the mass proportion was 2 : 8, as the pH of landfill was notably promoted. The discharge of Cu was not dependent on the mass proportion, due to the great affinity of Cu to organic matter. Moreover, Cu and Zn contents of the sub-MSW layer increased due to the MSWI bottom ash layer. Therefore, the MSWI bottom ash layer can increase the potential environmental threat of the landfill.
authors.affiliation: Center of Marine and Ecological Environment Protection, Taizhou University, Linhai 317000, China.
authors.forename: Qingna
authors.initials: Q
authors.lastname: Kong
authors.affiliation: Center of Marine and Ecological Environment Protection, Taizhou University, Linhai 317000, China; Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
authors.forename: Jun
authors.identifier: 0000-0002-3311-5192
authors.initials: J
authors.lastname: Yao
authors.affiliation: Center of Marine and Ecological Environment Protection, Taizhou University, Linhai 317000, China.
authors.forename: Zhanhong
authors.initials: Z
authors.lastname: Qiu
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Shen
mesh_terms: D060729:Coal Ash / Q000032:analysis* / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017745:Incineration / Q000379:methods; D012037:Refuse Disposal / Q000379:methods; D062611:Solid Waste / Q000032:analysis*; D064091:Waste Disposal Facilities; D015032:Zinc / Q000737:chemistry*
chemical_list: D060729:Coal Ash; D062611:Solid Waste; D003300:Copper; D015032:Zinc