安徽农业科学2011，Vol.39Issue(32)：19999-20001,3.
城市污泥热解重金属Cd的形态变化机理
Change Mechanism of Cd Form in Pyrolysis of Sewage Sludge
摘要
Abstract
Pure compounds CdS and CdCO3 used as model compounds present in sewage sludge were pyrolyzed in the pyrolysis atmosphere of sewage sludge at different temperatures. The pyrolysis products of CdS and CdCO, were analyzed by X-Ray diffraction (XRD) to investigate the change mechanism of Cd form in the pyrolysis of sewage sludge. The results showed that CdS in sewage sludge was stable at pyrolysis temperatures below 800 ℃ ,but decomposed above 800 X. ,and the reaction could be expressed as following:CdS→Cd( g) + S;CdCO3 in sewage sludge reacted as following:CdCO3->CdO + CO2 ,CdO + sulfide( g)->CdS,in which the sulfide was generated in the process of sludge pyrolysis,but CdS generated during pyrolysis decomposes at higher temperatures above 800 ℃.关键词
城市污泥/热解/重金属Cd/CdS/CdCO3Key words
Sewage sludge/Pyrolysis/Heavy metal Cd/CdS/CdCO3分类
资源环境引用本文复制引用
李静云,张双全,潘亭亭,王壬峰..城市污泥热解重金属Cd的形态变化机理[J].安徽农业科学,2011,39(32):19999-20001,3.基金项目
江苏省自然基金(8K2009097). （8K2009097）
