title: Thermal Behavior of Cd During Sludge Incineration: Experiments and Thermodynamic Equilibrium Model.
abstract: Experiments and thermodynamic equilibrium calculations were performed to investigate the behavior of Cd during sewage sludge incineration. The chemical equilibrium calculations indicated that chlorine significantly increased the volatilization of Cd in the form of CdCl2. In addition, SiO2-containing materials can function as sorbents for stabilizing Cd. The effect of PVC added to the sludge on the migration of Cd in the sludge was greater than that of NaCl. As the temperature increased, both organic and inorganic chlorides reduced the Cd distribution in the bottom ash. The chloride concentration, and the incineration time exhibited insignificant changes in Cd emission. With the addition of either NaCl or PVC into the sludge, the phases of Cd present in the bottom slag were primarily present in the form of silica-alumina oxides or multi-metal oxide, which could inhabit the Cd volatilization.
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jingyong
authors.initials: J
authors.lastname: Liu
authors.forename: Zhongxu
authors.initials: Z
authors.lastname: Zhuo
authors.forename: Shuiyu
authors.initials: S
authors.lastname: Sun
authors.forename: Wuming
authors.initials: W
authors.lastname: Xie
authors.forename: Shaoyou
authors.initials: S
authors.lastname: Lu
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.forename: Jiahong
authors.initials: J
authors.lastname: Kuo
authors.forename: Wang
authors.initials: W
authors.lastname: Yujie
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D017745:Incineration; D008855:Microscopy, Electron, Scanning; D008962:Models, Theoretical; D012722:Sewage / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics
chemical_list: D012722:Sewage; D002104:Cadmium