医疗垃圾焚烧底灰重金属特性  

CHARACTERISTICS OF HEAVY METALS IN BOTTOM ASH FROM HOSPITAL WASTE INCINERATOR

作　　者：刘汉桥[1,2] 魏国侠[1] 张曙光[2] 狄海燕[2] 蔡九菊[3] 

机构地区：[1]天津城市建设学院,天津300384 [2]天津泰达环保有限公司,天津300350 [3]东北大学材料与冶金学院,沈阳110004

出　　处：《环境化学》2009年第4期558-561,共4页Environmental Chemistry

基　　金：国家自然科学基金项目(20806051);中国博士后科学基金项目(20080440680);国家重点基础研究发展规划(973)项目(2005CB724206)资助

摘　　要：本文对医疗垃圾焚烧底灰的重金属含量、重金属形态及其渗沥率进行了研究.结果表明:底灰重金属渗沥浓度低于危险废物规定的阈值,但底灰中Zn和Pb的碳酸盐态(F2)含量较高,仍具有一定的潜在危险性;底灰中Zn和Pb的可交换态(F1)主要分布在小颗粒中,Pb的碳酸盐态(F2)基本不随颗粒度变化;Pb的渗沥率随初始pH值的增加近似呈U形变化,先降低后升高.In order to evaluate the environmental hazards of hospital waste incinerators bottom ash, the content, speclarion and leachability of heavy metal were investigated. The experimental results indicate that the bottom ash has low leachability and may be classified as non-hazardous wastes, but the bottom ash has potential hazards on the environment because the carbonate fraction （ F2 ） of Zn and Pb is still high in the bottom ash. The exchangeable fraction（ F1 ） of Zn and Pb only presents in small particle of bottom ash, the carbonate fraction （F2） of Pb doesnt change with particle size of bottom ash. The changing tendency of leaching ratio of Pb with the increase of PH was approximately U form.

关 键 词：医疗垃圾 底灰 重金属 渗沥率 

分 类 号：X799.5[环境科学与工程—环境工程]