title: Antimony smelting process generating solid wastes and dust: characterization and leaching behaviors.
abstract: A large amount of solid waste has been produced by the antimony smelting process in the "World Capital of Antimony", Xikuangshan area in China. This study comprehensively investigated the physical and chemical characteristics of the various solid wastes, as well as the leaching behavior of the solid wastes, which included water-quenched slag, arsenic-alkali residue, desulfurized slag and blast furnace dust. These four types of waste were enriched in a variety of heavy metals and metalloids and more specifically with As and Sb levels up to 8.6 × 10⁴ and 3.16×10⁵ mg/kg, respectively, in arsenic-alkali residue. For desulfurized slag and water-quenched slag, the leaching concentration of Sb significantly exceeded the acceptable limits during the leaching tests using the toxicity characteristic leaching procedure and the synthetic precipitation leaching procedure. In addition, As leaching in arsenic-alkali residue was extraordinarily hazardous, being three orders of magnitude higher than the regulatory level of As. According to the results of the extraction tests, all the tested wastes were classified as hazardous waste.
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: guoxj@bnu.edu.cn.
authors: Xuejun
authors: X
authors: Guo
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
authors: Kunpeng
authors: K
authors: Wang
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: hemc@bnu.edu.cn.
authors: Mengchang
authors: M
authors: He
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
authors: Ziwei
authors: Z
authors: Liu
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
authors: Hailin
authors: H
authors: Yang
authors: State Key Laboratory of Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
authors: Sisi
authors: S
authors: Li
mesh_terms: D000965:Antimony / Q000737:chemistry*; D004391:Dust; D008669:Metallurgy; D008855:Microscopy, Electron, Scanning; D056951:Photoelectron Spectroscopy; D062611:Solid Waste; D018505:Waste Management
chemical_list: D004391:Dust; D062611:Solid Waste; D000965:Antimony
keywords: Antimony smelter slag; Arsenic; BCR sequential extraction; SPLP; TCLP