Premium
Thermal Behavior of Cd During Sludge Incineration: Experiments and Thermodynamic Equilibrium Model
Author(s) -
Liu Jingyong,
Zhuo Zhongxu,
Sun Shuiyu,
Xie Wuming,
Lu Shaoyou,
Sun Jian,
Kuo Jiahong,
Yujie Wang
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14733681695843
Subject(s) - incineration , volatilisation , sewage sludge , chlorine , chemistry , thermodynamic equilibrium , metal , environmental chemistry , bottom ash , toxicity characteristic leaching procedure , combustion , chemical engineering , waste management , sewage treatment , fly ash , thermodynamics , organic chemistry , physics , engineering
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 CdCl 2 . In addition, SiO 2 ‐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.