Izmir Institute of Technology, Dept. of Environmental Engineering, Izmir, Turkey.
Izmir Institute of Technology, Dept. of Chemical Engineering, Izmir, Turkey.
Sci Total Environ. 2023 Jun 20;878:162966. doi: 10.1016/j.scitotenv.2023.162966. Epub 2023 Mar 21.
This study aimed to investigate long-range atmospheric transport of selected POPs released due to the effects of military conflicts in regions to the south of Turkey's borders. Ten locations were selected to deploy passive air samplers at varying distances to the border on a southeast-west transect of the country, proximity-grouped as close, middle, and far. Sampling campaign included winter and transition months when desert dust transport events occur. Hypothesis of the study was that a decreasing trend would be observed with increasing distance to the border. Group comparisons based on statistical testing showed that PBDE-183, ΣPCB, and dieldrin in winter; PBDE-28, PBDE-99, PBDE-154, p,p'-DDE, ΣPBDE, and ΣOCP in the transition period; and PBDE-28, PBDE-85, PBDE-99, PBDE-154, PBDE-190, PCB-52, ΣPCB, p,p'-DDE, and ΣOCP over the whole campaign had a decreasing trend on the transect. An analysis of concentration ratio to the background showed that long-range atmospheric transport impacted the study sites, especially those of close group in comparison to the local sources. Back-trajectory analyses indicated that there was transport from the conflict areas to sites in the close-proximity group, while farther sampling locations mostly received air masses from Europe, Russia, and former Soviet Union countries, followed by North Africa, rather than the military conflict areas. In consequence, decrease in concentrations with distance and its relation to molecular weight through proportions, diagnostic ratios, analysis of concentration ratio to the background, and back-trajectory analyses support the effect of transport from the military-conflict area to its north.
本研究旨在调查因土耳其边境以南地区军事冲突影响而释放的选定持久性有机污染物（POPs）的长程大气传输。选择了十个地点，在该国东南-西北向的横切线上，在距离边境不同距离处部署被动空气采样器，按接近程度分组为近、中、远。采样活动包括冬季和过渡月份，此时会发生沙漠尘暴传输事件。研究假设是，随着与边境距离的增加，观察到下降趋势。基于统计检验的组间比较表明，冬季的 PBDE-183、ΣPCB 和狄氏剂；过渡时期的 PBDE-28、PBDE-99、PBDE-154、p,p'-DDE、ΣPBDE 和 ΣOCP；以及整个采样期间的 PBDE-28、PBDE-85、PBDE-99、PBDE-154、PBDE-190、PCB-52、ΣPCB、p,p'-DDE 和 ΣOCP 沿横切线上均呈下降趋势。浓度与背景的比值分析表明，长程大气传输对研究地点产生了影响，特别是与本地源相比，接近组的研究地点受影响更大。后向轨迹分析表明，有污染物从冲突地区传输到接近组的地点，而更远的采样地点主要接收来自欧洲、俄罗斯和前苏联国家的气团，其次是北非，而不是军事冲突地区。因此，浓度随距离的降低及其与分子量的关系通过比例、诊断比、浓度与背景的比值分析以及后向轨迹分析得到支持，这些都支持了污染物从军事冲突地区向北传输的影响。
