State Key Laboratory of Precision Blasting, School of Environment and Health, Jianghan University, Wuhan 430056, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
J Hazard Mater. 2022 Oct 15;440:129776. doi: 10.1016/j.jhazmat.2022.129776. Epub 2022 Aug 15.
Novel brominated flame retardants (NBFRs) and organophosphate esters (OPEs) have been widely detected in various environmental matrices worldwide and raised public concerns in recent years. However, few studies reported their occurrence and temporal trend in Antarctic air. In this study, concentrations, distribution, and temporal trends of NBFRs and OPEs in the air of Fildes Peninsula, West Antarctica, were investigated using XAD resin-based passive air sampling from January 2011 to January 2020. Air concentrations of the total OPEs (ΣOPEs) were one to two orders of magnitude higher than those of the total NBFRs (ΣNBFRs). Decabromodiphenyl ethane and tris(2-chloroethyl) phosphate were the most abundant NBFR and OPE congeners, respectively. Significant positive correlations were observed among hexabromobenzene, pentabromoethylbenzene, and pentabromotoluene, indicating that their occurrence in Antarctic air may be affected by similar sources. No spatial differences in any of the NBFR and OPE congeners were observed, implying minor impact from local scientific research stations. Linear regression analysis was used to evaluate the temporal trends of NBFRs and OPEs in Antarctic air, with decreasing trends observed for ΣNBFRs and ΣOPEs. This is one of the rare studies providing a comprehensive investigation of the temporal trends in NBFRs and OPEs in Antarctic air and highlights concern regarding the contamination of these chemicals in remote polar regions.
新型溴化阻燃剂（NBFRs）和有机磷酸酯（OPEs）在世界范围内的各种环境基质中被广泛检出，近年来引起了公众的关注。然而，关于南极空气中这些物质的含量及其时间变化趋势的研究却很少。本研究采用 XAD 树脂基被动式空气采样，于 2011 年 1 月至 2020 年 1 月，对南极洲菲尔德斯半岛的空气进行了 NBFRs 和 OPEs 的浓度、分布和时间变化趋势研究。总有机磷酸酯（ΣOPEs）的浓度比总 NBFRs（ΣNBFRs）高一到两个数量级。十溴二苯乙烷和三（2-氯乙基）磷酸酯分别是最丰富的 NBFR 和 OPE 同系物。六溴苯、五溴乙基苯和五溴甲苯之间存在显著的正相关关系，表明它们在南极空气中的存在可能受到类似来源的影响。在所研究的 NBFR 和 OPE 同系物中，未观察到任何空间差异，这表明当地科学研究站的影响较小。线性回归分析用于评估南极空气中 NBFRs 和 OPEs 的时间变化趋势，ΣNBFRs 和 ΣOPEs 呈下降趋势。这是为数不多的对南极空气中 NBFRs 和 OPEs 的时间变化趋势进行全面研究的研究之一，强调了对这些化学物质在偏远极地地区污染的关注。
