Volatilization of heavy metals during incineration of municipal solid wastes

作     者：SUNLu-shi S.Abanades J.D.Lu G.Flamant D.Gauthier 

作者机构：StateKeylaboratoryofCoalCombustionHuazhongUniversityofScienceandTechnologyWuhan430074China InstitutdeScienceetdeG6niedesMat6riauxetProc6d6s（CNRS-IMP）BP50deillo66125Font-RomeuCedexFrance 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2004年第16卷第4期

页      面：635-639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：TheSpecialFundsforMajorStateBasicResearchProjectofChina(No.G1 9990 2 2 2 1 2 )  andtheStateKeyProgramforInternationalCooperation(No .2 0 0 1CB71 1 2 0 3) 

主　　题：municipal solid waste incineration heavy metal emission fluidized bed 

摘      要：Incineration experiments with MSW, which had been impregnated with heavy metals, were presented to obtain information on the volatilization behavior of the elements cadmium(Cd), lead(Pb), and zinc(Zn) under different conditions. Experiments were carried out in a bubbling fluid bed system connected to a customized inductively coupled plasma optical emission spectroscopy(ICP-OES) for analyzing metals in the flue gas. The results indicated that the combustion temperature, the gas atmosphere, and the chlorine content in the flue gas could affect the volatilization behavior of heavy metals. In the fluidized bed combustion, a large surface area was provided by the bed sand particles, and they may act as absorbents for the gaseous ash-forming compound. Comparer with the metals Cd and Pb, the vaporization of Zn was low. The formation of stable compounds such as ZnO·Al 2O 3 could greatly decrease the metals volatilization. The presence of chlorine would enhance the volatilization of heavy metals by increasing the formation of metal chlorides. However, when the oxygen content was high, the chlorinating reaction was kinetically hindered, which heavy metals release would be delayed.