MINTEQ modeling for evaluating the leaching behavior of heavy metals in MSWI fly ash

查看全文 作　　者：Mang [1]Yan;Jiang [1]Jianguo;Chen [1]Maozhe

机构地区：[1]Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

出　　处：《Journal of Environmental Sciences》索引2008年第20卷第11期,共5页

摘　　要：At present,all kinds of municipal solid waste incineration (MSWI) fly ash stabilization technology has been reported and successfully applied in many countries.However,leaching procedures are very different that the technologies lack uniform standard,and it is even impossible to predict the long-term stabilization.Geochemical model can explain the environmental stabilization based on chemical phase and thermodynamic crystal structure,and it is also able to guide the development of environment-friendly stabilization technology and choosing of chemical agents.Both experiment analysis and geochemical modeling were used to study the correlation between leaching behavior of MSWI fly ash and variation of pH.Dissolution/precipitation mechanism was applied in the simulation.The result indicated that the pH-dependent leaching behavior predicted by Visual MINTEQ is well in agreement with the result of pH-dependent test.pH value of leachate can significantly change the leaching behavior of MSWI fly ash.The leaching behavior of heavy metals for Pb and Cd is controlled by dissolution/precipitation mechanism,whereas for Zn and Ni,it is effected by surface adsorption reaction over a special extent of pH value. 关键词：MINTEQ model incinerator fly ash stabilization mechanism

相关文献

参考文献（10）
引证文献（15）
耦合文献（0）

参考文献(10)

引证文献(15)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

MINTEQ modeling for evaluating the leaching behavior of heavy metals in MSWI fly ash

参考文献(10)

引证文献(15)

用户提示