Chlorinated and brominated polycyclic aromatic hydrocarbons (ClPAHs and BrPAHs, respectively) are a new derivative group of PAHs. These halogenated PAHs (Halo-PAHs) have been reported to be carcinogenic and are considered emerging persistent organic pollutants. Gaining a clear understanding of the distribution and behavior of these ubiquitous organic pollutants is essential for the control and mitigation of their emission into the environment. However, research into the characteristics of Halo-PAHs in the atmosphere has been somewhat limited. This review paper thus aims to provide an overview of the seasonal patterns, profiles, potential sources, and particle-size distributions of atmospheric ClPAHs and BrPAHs with 3–5 rings. Most previous studies have focused on particulate Halo-PAHs and reported that their levels are higher during the cold season than during the warm season, with this seasonal variation more apparent for ClPAHs than for BrPAHs. In terms of their phase distribution, ClPAHs and BrPAHs share a similar trend, with their gaseous concentrations highest in summer and lowest in winter and their particulate concentrations exhibiting the opposite trend. Halo-PAH profiles have been shown to differ between sampling locations, possibly reflecting differences in the potential sources present at these sites, e.g., coal burning, traffic emissions, and industrial activity. The majority of Halo-PAHs tend to accumulate as ultrafine particles with an aerodynamic diameter of less than 1.0 µm. Overall, a detailed understanding of the characteristics of Halo-PAHs in the atmosphere has yet to be achieved; hence, further research on atmospheric Halo-PAHs is necessary.

氯化和溴化多环芳烃（分别为ClPAH和BrPAH）是PAH的新衍生物。据报道，这些卤代多环芳烃（Halo-PAHs）具有致癌性，被认为是新兴的持久性有机污染物。对这些无处不在的有机污染物的分布和行为有一个清晰的了解，对于控制和减少其向环境中的排放至关重要。但是，对大气中Halo-PAHs特性的研究在一定程度上受到限制。因此，本综述旨在概述3–5个环的大气ClPAHs和BrPAHs的季节模式，分布，潜在来源和粒径分布。先前的大多数研究都集中在颗粒Halo-PAHs上，并报告说它们在寒冷季节的含量高于温暖季节的含量，ClPAHs的这种季节性变化比BrPAHs更为明显。就其相分布而言，ClPAHs和BrPAHs具有相似的趋势，其气态浓度在夏季最高，而在冬季最低，其颗粒物浓度呈现相反的趋势。Halo-PAH曲线在两个采样位置之间存在差异，这可能反映了这些站点上潜在来源的差异，例如燃煤，交通排放和工业活动。大多数Halo-PAH倾向于积聚为空气动力学直径小于1.0 µm的超细颗粒。总体，对大气中Halo-PAHs特性的详细了解尚待实现；因此，有必要进一步研究大气中的Halo-PAHs。