Sun Jie, Hu Juan, Zhu Gengzheng, Zhang Dadang, Zhu Yuyi, Chen Zhihai, Li Jiafu, Zhang Hongjian, Tang Jinshun, Nie Jihua, Zhang Shuyu
Jiangsu Levei Testing Company Limited, Wuxi 214000, China.
Jiangsu Levei Testing Company Limited, Wuxi 214000, China.
Ecotoxicol Environ Saf. 2017 May;139:83-88. doi: 10.1016/j.ecoenv.2017.01.015.
This study provided distribution and health risk information of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in fly ash from 4 municipal solid waste incinerators (MSWIs) in four seasons from four sites, including Zhengzhou City in Henan Province, Chuzhou City in Anhui Province, Jilin City in Jilin Province and Zibo City in Shandong Province. The toxic equivalent concentration (I-TEQ) values of PCDD/Fs ranged from 0.0707 to 0.7742ng I-TEQ/g, and no identical sequence occurred during four seasons in different sampling sites. The stabilization process might efficiently reduce the content and toxicology of PCDD/Fs in fly ash. The value of PCDD/PCDF in fly ash ranged from 0.145 to 0.787 after solidification. The characteristic index (DCI) of 2,3,4,7,8-PCDF was 0.803 with 6.6% under 95% probability for fly ash samples discharged from MSWIs. The 95th percentile carcinogenic risks (CRs) for onsite workers were lower than the threshold value (10), suggesting that the cancer risk levels of PCDD/Fs in fly ash for onsite workers were acceptable. The 95th percentile non-carcinogenic risks (non-CRs) for onsite workers were lower than 1, suggesting no obvious non-carcinogenic effect was developed for onsite workers. This paper provide an overview information on the distribution of PCDD/Fs in fly ash during four seasons, and it could be used as an important fingerprint to distinguish the fly ash sources. Thus, the research could provide basic information for fly ash management in environment.
本研究提供了来自河南郑州、安徽滁州、吉林吉林和山东淄博四个地点的4座城市生活垃圾焚烧炉（MSWI）飞灰中多氯二苯并对二恶英和二苯并呋喃（PCDD/Fs）在四个季节的分布及健康风险信息。PCDD/Fs的毒性当量浓度（I-TEQ）值在0.0707至0.7742 ng I-TEQ/g之间，不同采样地点在四个季节中未出现相同序列。稳定化过程可能有效降低飞灰中PCDD/Fs的含量和毒理学特性。固化后飞灰中PCDD/PCDF的值在0.145至0.787之间。MSWI排放的飞灰样品中，2,3,4,7,8-PCDF的特征指数（DCI）为0.803，95%概率下低于该值的占6.6%。现场工人的第95百分位数致癌风险（CRs）低于阈值（10），表明飞灰中PCDD/Fs对现场工人的癌症风险水平是可接受的。现场工人的第95百分位数非致癌风险（non-CRs）低于1，表明对现场工人未产生明显的非致癌效应。本文提供了PCDD/Fs在四个季节飞灰中分布的概述信息，可作为区分飞灰来源的重要特征。因此，该研究可为环境中飞灰管理提供基础信息。
