环境和人体中氯代/溴代多环芳烃的研究进展——污染来源、分析方法和污染特征

氯代/溴代多环芳烃(Cl/Br-PAHs)是一类具有与二噁英和多环芳烃(PAHs)相似结构和致癌效应的新兴持久性毒害污染物,其环境行为归趋和潜在风险受到了高度重视.本研究以Cl-PAH*ORBr-PAH*ORH-PAH*ORchlorinated PAH*ORbrominated PAH*ORha...

A review of chlorinated/brominated polycyclic aromatic hydrocarbons in the environment and human: Sources,analysis methods and pollution characteristics

Chlorinated/brominated polycyclic aromatic hydrocarbons (Cl/Br-PAHs) were a class of emerging persistent toxic contaminants that demonstrating similar chemical structures and carcinogenicities with dioxins and PAHs. Their behaviors, fates, and potential risks in environments were of great concern. This study retrieved the Web of Science Database with the topics including Cl-PAH* OR Br-PAH* OR H-PAH* OR chlorinated PAH* OR brominated PAH* OR halogenated PAHs OR chlorinated polycyclic aromatic hydrocarbon* OR brominated polycyclic aromatic hydrocarbon* OR halogenated polycyclic aromatic hydrocarbon*, and reviewed the research progress of the sources, pollution characteristics and analysis methods of Cl/Br-PAHs focusing on the environmental matrix and human beings. The results showed that 225 papers in total within this topic were published by Jan. 2021. The existing findings showed that:Cl/Br-PAHs were mainly generated from thermal processes such as waste incineration, vehicle exhaust, metal smelting, electronic waste recycling, etc., as well as some photochemical processes; So far, Cl/Br-PAHs were found ubiquitous in various environments worldwide, and demonstrated persistence, long-distance transportability and bioavailability; It was documented that Cl/Br-PAHs had similar or stronger toxicity compared to their parent PAHs. However, their formation mechanisms and environmental behaviors were still unclear; An effective and precise analytical method was still unavailable, leading to very limited reports on Cl/Br-PAH compounds in environments and the overall research area on this topic was still in its infant stage. Based on the current research status and knowledge gaps of Cl/Br-PAHs, more attention should be paid to their high-throughput and precise analytical methods, emission fingerprints, environmental behaviors, and potential risks in the future.