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综合分析了所测的遗体火化炉的36个样品和文献中41组数据中二英(PCDD/Fs)化合物的排放指纹特征,分析了不同单体与毒性当量浓度I-TEQ的相关性,提出了适合火化炉的I-TEQ指示物,为以后实现在线监测PCDD/Fs提供依据.结果表明,本次监测样品的毒性当量浓度跨度较大,为0.014~24.0 ng·m~(-3)(以I-TEQ计,下同),平均值为2.68 ng·m~(-3).所有新建火化炉的结果均低于0.5 ng·m~(-3),75%的旧炉超过2017年7月1日开始执行的新标准限值,表明现有部分老旧火化炉及其尾气处理设施亟需技术改造才能满足新要求.体积分数最高的单体依次为OCDD、1,2,3,4,6,7,8-Hp CDF和1,2,3,4,6,7,8-Hp CDD,分别为16.7%±11.8%、12.1%±4.4%和11.9%±4.2%.对I-TEQ的贡献率最大的单体为2,3,4,7,8-Pe CDF,且PCDFs与PCDDs的毒性当量浓度比值,即ρ(PCDFs/PCDDs)>1.四、五、六氯代二英和呋喃与I-TEQ具有显著的线性相关性,其中,1,2,3,7,8-Pe CDF、2,3,4,7,8-Pe CDF和1,2,3,7,8-Pe CDD与I-TEQ的相关系数r大于0.89.与I-TEQ线性关系最佳的单体为2,3,4,7,8-Pe CDF,R~2为0.97,斜率为2.36;最佳的同类物为Pe CDF,R~2为0.97,斜率为2.22.
The fingerprint characteristics of dioxin (PCDD / Fs) compounds in 36 samples of the remains cremation furnace and 41 sets of data in the literature were analyzed. The correlation between different monomers and toxic equivalent concentration I-TEQ was analyzed. The I-TEQ indicator suitable for cremators provided the basis for the on-line monitoring of PCDD / Fs in the future.The results showed that the toxic equivalent concentrations of this monitoring sample span a large range from 0.014 to 24.0 ng · m -3 I-TEQ, the same below) with an average value of 2.68 ng · m -3 .The results of all new cremators were below 0.5 ng · m -3, and 75% of the old ones exceeded 2017 July 1 the implementation of the new standard limits, indicating that some of the existing old cremators and their exhaust gas treatment facilities in urgent need of technological innovation to meet the new requirements.The highest volume fraction of the monomer followed by OCDD, 1,2,3, 4,6,7,8-Hp CDF and 1,2,3,4,6,7,8-Hp CDD, respectively, at 16.7% ± 11.8%, 12.1% ± 4.4% and 11.9% ± 4.2% -TEQ the largest contribution to the monomer 2,3,4,7,8-Pe CDF, and PCDFs and PCDDs toxic equivalent concentration ratio, namely ρ (PCDFs / PCDDs)> 1. Four, five, six chloride Dioxin and furan have a significant linear correlation with I-TEQ, among which 1,2,3,7,8-Pe CDF, 2,3,4,7,8-Pe CD F and 1,2,3,7,8-Pe CDD and I-TEQ correlation coefficient r greater than 0.89 and I-TEQ the best linear relationship between the monomer 2,3,4,7,8-Pe CDF, R ~ 2 is 0.97 with a slope of 2.36; the best congener is PeCDF with R ~ 2 of 0.97 and a slope of 2.22.