生活垃圾焚烧飞灰中的二噁英分布及指示异构体的识别  

PCDD/Fs Distribution in MSWI Fly Ash and Identification of the Indicated Isomer

作　　者：王伟[1] 高兴保[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境科学》2007年第2期445-448,共4页Environmental Science

基　　金：国家自然科学基金项目(20277024);国家高技术研究发展计划(863)项目(2002AA644010)

摘　　要：对我国4座生活垃圾焚烧炉飞灰样品中的二噁英分析结果表明，二噁英的毒性当量范围为0．34—3．80ng/g．二噁英异构体的分布具有相似性，其中1，2，3，7，8-PeCDD和2，3，4，7，8-PeCDF共占毒性当量的33．6％-40．5％．结合对某生活垃圾焚烧炉长期监测结果，同一焚烧炉不同时期飞灰样品的二噁英毒性当量与1，2，3，7，8-PeCDD和2，3，4，7，8-PeCDF贡献值具有很好的线性相关性（r分别为0．9963和0．9974），1，2，3，7，8-PeCDD和2，3，4，7，8-PeCDF可作为指示异构体用于焚烧飞灰中二噁英毒性的快速测定，尤其适用于同一焚烧炉的长期监测，指示因子分别为4．4664和3．1646；不同焚烧炉飞灰的二噁英毒性当量与2，3，4，7，8-PeCDF有很好的线性相关性（r=0．9849），2，3，4，7，8-PeCDF可作为不同焚烧炉飞灰中二噁英检测的指示异构体，指示因子为3．4194．Four municipal solid waste incinerator （MSWI） fly ash samples were analyzed for PCDD/Fs. The toxicity equivalent quotient （TEQ） was 0.34 - 3.80 ng/g. The congeners distribution presented great comparability to each other as 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF contributed about 33.6% - 40.5% of total TEQ. Combination with the published PCDD/Fs resuhs of the long-term monitoring in MSWI fly ash in Shanghai, it was found that total TEQ had good correlation with 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF contribution （r = 0.996 3 and 0.997 4 respectively）, so they could be considered as indicator isomers for the rapid determination of TEQ evaluation, especially in long-term monitoring of one incinerator. The indicator factors were 4.466 4 and 3.164 6 respectively. The analysis of the PCDD/Fs results from different incinerators also showed good correlation with 2,3,4,7,8-PeCDF contribution （ r = 0.984 9） and it could be considered as indicator isomer for TEQ evaluation of MSWI fly ash samples. The indicator factor was 3.419 4.

关 键 词：生活垃圾 焚烧 飞灰 二噁英 指示异构体 

分 类 号：X132[环境科学与工程—环境科学]