title: Relation between leaching characteristics of heavy metals and physical properties of fly ashes from typical municipal solid waste incinerators.
abstract: Due to the alkalinity and high concentration of potentially hazardous heavy metals, fly ash from a municipal solid waste (MSW) incinerator is classified as hazardous waste, which should be of particular concern. Physical and chemical characterizations of the contrasted fly ashes were investigated to explore the relation between leaching characteristics of heavy metals and physical properties of fly ashes. The results showed that CaClOH, NaCl, Ca(OH)2, KCl and SiO2were primary mineral compositions in the MSWI fly ashes, and the particle size distribution of fly ash ranged between 10 μm and 300 μm. The smaller the particle size distribution of fly ash, the larger the BET-specific surface area, which was beneficial to the leaching of heavy metals. As a result of various pores, it easily accumulated heavy metals as well. The leaching tests exhibited a high leachability of heavy metals and the leaching concentration of Pb in almost all of the fly ash samples went far beyond the Standard for Pollution Control on the Landfill Site of Municipal Solid Waste. Thereupon, it is necessary to establish proper disposal systems and management strategies for environmental protection based on the characteristics of MSW incineration (MSWI) fly ash in China.
authors: a State Key Laboratory of Coal Combustion , Huazhong University of Science and Technology , Wuhan , People's Republic of China.
authors: Peng
authors: P
authors: Ni
authors: b School of Energy Science and Engineering , Central South University , Changsha , Hunan , People's Republic of China.
authors: Hailong
authors: H
authors: Li
authors: a State Key Laboratory of Coal Combustion , Huazhong University of Science and Technology , Wuhan , People's Republic of China.
authors: Yongchun
authors: Y
authors: Zhao
authors: a State Key Laboratory of Coal Combustion , Huazhong University of Science and Technology , Wuhan , People's Republic of China.
authors: Junying
authors: J
authors: Zhang
authors: a State Key Laboratory of Coal Combustion , Huazhong University of Science and Technology , Wuhan , People's Republic of China.
authors: Chuguang
authors: C
authors: Zheng
mesh_terms: D002244:Carbon; D002681:China; D060729:Coal Ash / Q000737:chemistry*; D017745:Incineration; D019216:Metals, Heavy / Q000032:analysis; D052638:Particulate Matter; D012037:Refuse Disposal; D012822:Silicon Dioxide; D062611:Solid Waste
chemical_list: D060729:Coal Ash; D019216:Metals, Heavy; D052638:Particulate Matter; D062611:Solid Waste; D002244:Carbon; D012822:Silicon Dioxide
keywords: MSW incinerator; fly ash; heavy metals; leaching; solid wastes