State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Beijing 100085, China.
Chemosphere. 2012 Jan;86(3):248-51. doi: 10.1016/j.chemosphere.2011.09.034. Epub 2011 Oct 21.
The production of chloranil is regarded as a potentially significant source of unintentional POPs. This research aimed to identify the contamination levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), hexachlorobenzene (HxCBz), pentachlorobenzene (PeCBz) and polychlorophenols in chloranil samples and identify the formation pathways. The toxicity equivalent (TEQ) values for PCDD/Fs in the chloranil samples ranged from 163 to 1540200 pg I-TEQg(-1), while the PCB TEQ values ranged from 1.9 to 3.3 pg WHO-TEQg(-1). High levels of HxCBz, PeCBz and polychlorophenols were also detected in the chloranil samples. The average emission factors were 522.2 mg I-TEQt(-1) (PCDD/Fs), 0.0026 mg WHO-TEQt(-1) (PCBs), 32.6 mg t(-1) (HxCBz), and 136.6 mg t(-1) (PeCBz). The PCDD/Fs and PCBs are thought to be formed from the polychlorophenols and polychlorobenzenes generated during the chloranil production process. Purification of the chloranil products can reduce the unintentional POPs releases and protect the environment.
氯丹的生产被认为是无意持久性有机污染物的一个潜在重要来源。本研究旨在确定氯丹样品中多氯二苯并对二恶英和呋喃（PCDD/Fs）、多氯联苯（PCBs）、六氯苯（HxCBz）、五氯苯（PeCBz）和多氯酚的污染水平，并确定其形成途径。氯丹样品中 PCDD/Fs 的毒性当量（TEQ）值范围为 163 至 1540200 pg I-TEQg(-1)，而 PCB TEQ 值范围为 1.9 至 3.3 pg WHO-TEQg(-1)。氯丹样品中还检测到高浓度的 HxCBz、PeCBz 和多氯酚。平均排放因子分别为 522.2 mg I-TEQt(-1)（PCDD/Fs）、0.0026 mg WHO-TEQt(-1)（PCBs）、32.6 mg t(-1)（HxCBz）和 136.6 mg t(-1)（PeCBz）。PCDD/Fs 和 PCBs 被认为是由氯丹生产过程中产生的多氯酚和多氯苯形成的。氯丹产品的净化可以减少无意持久性有机污染物的释放，保护环境。
