Combustion characteristics of tannery sludge and volatilization of heavy metals in combustion

作     者：Xu-guang JIANG Chun-yu LI Zhen-wei FEI Yong CHI Jian-hua YAN 

作者机构：State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2010年第11卷第7期

页      面：530-537页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：Project supported by the National High-Tech Research and Devel-opment (863) Program of China (Nos. 2007AA061302 and 2007AA06Z336) the Key Project of Science and Technology of Zhejiang Province, China (No. 2007C13084) the Zhejiang Provincial Natural Science Foundation of China (Nos. X506312 and R107532) the Project on Science and Technology of Zhejiang Province (No. 2008C23090), China the Program for New Century Excellent Talents in University (No. NCET-05-0524) the Y. C. TANG Disciplinary Development Fund of Zhejiang University, China 

主　　题：Tannery sludge Combustion Heavy metal volatilization Thermogravimetric analysis (TGA) Combustion kinetics 

摘      要：Incineration is considered one of the most readily available techniques for sewage sludge disposal, including tannery sludge, which often contains significant amounts of volatile heavy metals. The combustion characteristics and kinetic analysis of tannery sludge were investigated using thermogravimetric analysis (TGA) at a heating rate of 30 °C/min in 50–950 °C. In addition to confirming that tannery sludge has a high content of volatile material and ash, it was further discovered that almost all the zinc (Zn) in tannery sludge is volatilized at 900 °C. The degree of volatilization for heavy metals at 900 °C followed the order of ZnCdCuMnPbCr. Moreover, the volatilization of these heavy metals increased with temperature. It is thus concluded that, to avoid heavy metal volatization during incineration disposal, 800 °C is a reasonable incineration temperature.