不同垃圾焚烧设备中二噁英的排放特征和I-TEQ指示物的研究  

PCDD/F Emission Characteristics in Different Waste Incineration Facilities and Evaluation of 23478-PeCDF as I-TEQ Indicator of PCDD/F in Flue Gases

作　　者：高洪才[1,2] 倪余文[1] 张海军[1] 张青[1] 苏凡[1] 赵亮[1] 张宁[1] 张雪萍[1] 陈吉平[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023 [2]中国科学院研究生院,北京100049

出　　处：《环境科学》2009年第5期1545-1550,共6页Environmental Science

基　　金：国家科技支撑计划项目(2008BAC32B03);中国科学院知识创新工程领域前沿项目(K2007C1)

摘　　要：分析了国内3种不同类型的垃圾焚烧设备中二噁英化合物的排放特征,不同PCDD/F单体与I-TEQ的相关性以及23478-PeCDF与I-TEQ的线性回归分析.得到了不同类型的垃圾焚烧设备中二噁英同系物的统计学分布特征.结果发现,生活垃圾、医疗垃圾和危废焚烧炉中二噁英（PCDD/F）同系物分布虽有一定差异,但变化不大,与生活垃圾焚烧炉和危废焚烧炉相比,医疗垃圾焚烧炉中噁英同系物的分布稍有区别.在3种焚烧炉的烟道气中体积分数最大的是OCDD和1234678-HpCDF,分别为12.3%-23.0%和15.0%-19.7%;而对I-TEQ贡献最大的则是23478-PeCDF,体积分数为33.1%-34.5%,远远高于其它的PCDD/F单体.通过对不同的PCDD/F单体与I-TEQ的相关性分析发现：23478-PeCDF与I-TEQ的相关性最好,相关系数R2为0.93-0.98;而毒性最大的2378-TCDD与I-TEQ的相关性较差,R2为0.29-0.49;体积分数最大的OCDD与I-TEQ的相关性很差,R2为0.03-0.12;体积分数较大的1234678-HpCDF与I-TEQ也有较好的相关性,R2为0.62-0.87,但依然次于23478-PeCDF.通过23478-PeCDF与I-TEQ线性回归的结果发现：即使I-TEQ的浓度范围为5-6个数量级,23478-PeCDF与I-TEQ也表现出很好的线性关系,对于不同的垃圾焚烧设备,回归曲线斜率为在1.16-1.40之间,相关系数R2在0.94-0.97之间.The emission characteristics of PCDD/F from different waste incineration facilities in China, the correlations of different PCDD/F isomers with I-TEQ and the linear regression analysis of 23478-PeCDF with I-TEQ were reported in this article. Statistical analysis of the homologue patterns of PCDD/F in different incineration facilities will provide valuable information in environmental survey to find the contamination sources. PCDD/F congener patterns were almost constant among municipal and hazardous waste incineration facilities with only very small variations, but those patterns in medical waste incineration facilities were slightly different from medical and hazardous waste incineration facilities. It was found that the major contributors to the toxic PCDD/F concentrations were OCDD and 1234678-HpCDF contributing for 12.3 % -23.0 % and 15.0 % - 19.7 % respectively. However, the largest contributor to I-TEQ was 23478-PeCDF and 33.1% - 34.5 % of I-TEQ was the presence of this congener. Correlation analysis showed that：23478-PeCDF posed the best the correlation relationship with I-TEQ, R^2 0.93-0.99. The most toxic 2378-TCDD only posed weak correlation with I-TEQ, R^2 0.29-0.49. The correlation coefficient between the most abundant OCDD and I-TEQ was only 0.03-0.12. However, another abundant congener 1234678-HpCDF posed better correlation with I-TEQ, R^2 0.62-0.87. Linear regression analysis showed that even I-TEQ fell into the concentration range of 5-6 orders of magnitudes, the linear relationship between 23478-PeCDF and I-TEQ was still excellent. The slopes of that lines, in different waste incineration facilities,were in the range of 1.16-1.40 and R^2 0.94-0.97.

关 键 词：垃圾焚烧 二噁英 I-TEQ 烟道气 

分 类 号：X705[环境科学与工程—环境工程]