Mixed Polybrominated/chlorinated Dibenzo- p -dioxins and Dibenzofurans in Stack Gas Emissions from Industrial Thermal Processes

作者：Bing Du, Minghui Zheng, Yeru Huang, Aimin Liu, Honghai Tian, Lingling Li, Nan Li, Te Ba, Yuwu Li, Shuping Dong, Wenbin Liu, Guijin Su · 发表于：Environmental Science & Technology · 年份：2010 · DOI：10.1021/es100867d · 被引用次数：32 · 研究领域：Toxic Organic Pollutants Impact、Air Quality and Health Impacts、Effects and risks of endocrine disrupting chemicals

Very little is known about mixed polybrominated/chlorinated dibenzo-p-dioxins and dibenzofurans (PBCDD/F) in industrial thermal processes. In this study, the occurrences and characteristics of PBCDD/F from various incineration and metallurgical processes were investigated. In addition, PBCDD/F analytical protocols based on HRGC/HRMS were developed and optimized. The sum of isomer group concentrations ranged from 1.7-3740 pmol Nm(-3) for PBCDF and 0.2-582 pmol Nm(-3) for PBCDD. For some metallurgical industries, the amounts of PBDD/F and PBCDD/F emitted were similar to or even higher than the amounts of PCDD/F. The sources of bromine and brominated-precursors in these processes should be evaluated. The PBCDD/F characteristics investigated included isomer group patterns, ratio of bromine and chlorine incorporated in PBCDD/F, and ratio of halogenated furans to dioxins. Lower brominated PBCDD/F were binomially distributed. But in some cases, the concentrations of higher brominated PBCDD/F were much higher than predicted from the binomial distribution. The formation mechanisms of PBDD/F, PBCDD/F, and PCDD/F in these processes were also evaluated.