Chemical fractions of hazardous heavy metals in various hospital waste ashes
In the present study, typical hospital waste (HW) incinerator ashes from five representative locations in China were collected and analyzed by ICP-AES. The ashes were found to contain large amounts of Zn (5960-22430mg·kg<-1>), Ba (1454-2382mg·kg<-1>), Cu (267- 1699mg·kg<-1>), Pb (85-2025mg·kg<-1>), Mn (426-1 210mg·kg<- 1>), Cr (195-1018mg·kg<-1>), Sb (74- 1224mg·kg<-1>), Sn (79- 917mg·kg<-1>) and Ni (23-503mg·kg<-1>). A sequential extraction procedure was used to determine the chemical association of Ba, Cd, Cr, Cu, Mn, Ni, Pb, and Zn in order to characterize the environmental mobility and availability of these metals. The results showed that Ba, Cr and Ni were mainly present in the residual fraction, while Cd was primarily found in the exchangeable and carbonate fractions, Mn and Zn in the Fe-Mn oxide fraction, Pb in the Fe-Mn oxide and residual fractions, and Cu in the organic matter fraction. This research provides a basis for an appropriate treatment of hospital waste ashes.
Hospital waste Ash Heavy metals Leaching Sequential extraction procedure
L. J. Zhao F. S. Zhang Z. Y. Qi
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Bei Harbin Environment Project Assessment Center, NO. 499 Tongda Street daoli Dictrist, Harbin 10076, Ch
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
683-684
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）