污泥热处理过程中多环芳烃和多氯联苯的迁移行为  

Transfer behavior of PAHs and PCBs from sewage sludge in the thermal treatment process

作　　者：张怡斐[1] 张辉[1] 许美芝[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《中国环境科学》2011年第6期933-937,共5页China Environmental Science

摘　　要：对污泥热处理过程中产生的多环芳烃、多氯联苯等有机污染物的迁移转化行为及条件进行了模拟实验研究.结果表明,污泥中多环芳烃中的萘、荧蒽、苯并(b)荧蒽、苯并(a)芘、茚并(1,2,3-cd)芘在800℃温度条件下的去除率分别为66.28%,73.7%,100%,30.7%和100%;多氯联苯在300～400℃之间含量急剧减少,1000℃时其单体PCB28、PCB52、PCB101、PCB118、PCB153、PCB138和PCB180的去除率分别为89.35%、90.66%、89.43%、93.97%、99.1%、84.7%和95.22%.2种物质迁移规律与处理体系温度变化直接相关,2种物质从污泥中转化释放的温度条件分别为:多环芳烃300～750℃(90%以上),多氯联苯350～900℃(85%以上).处理过程中2种污染物的不同单体间存在复杂的转化反应.Based on the simulated experiment the behavior and mechanism of the transfer and transform in the process of thermal treatment for polycyclic aromatic hydrocarbon（PAHs） and polychlorinated biphenyl（PCBs） in the sewage sludge were studied.The ratio of removing from the sewage sludge under 800 ℃ temperature condition was 66.28% for Naphthalene,73.73% for Fluoranthene,100% for Benzo[b]fluoranthene,30.7% for Benzo[a]pyrene,and 100% for Indeno（1,2,3）pyrene.PCBs were quickly reduced at the temperature range within 300～400 ℃,and when at 1000 ℃ the ratio of removing reached 89.35% for PCB28,90.66% for PCB52,89.43% for PCB101,93.97% for PCB118,99.1% for PCB153,84.7% PCB138,and 95.22% for PCB180.The transfer of these two pollutants in the process was directly related to the temperature of the treating system.The temperature interval for PAHs transfer and release from the sewage sludge was mainly in 300～750℃（release more than 90% of the total in the sewage sludge）,and for PCBs was in 350～900℃（release more than 85% of the total in the sewage sludge）.In the treatment process there were complicated transform reactions respectively between their monomers of the studied pollutants.

关 键 词：市政污泥 多环芳烃 多氯联苯 热处理 

分 类 号：X705[环境科学与工程—环境工程]