Zhu Tingting, Zhu Youchang, Liu Yunlang, Deng Chen, Qi Xiujuan, Wang Jinling, Shen Zhizhi, Yin Donggao, Liu Yihong, Sun Ruohan, Sun Weiling, Xu Nan
State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Emerging Contaminants Detection and Control in Water Environment, Guangdong Engineering Research Center of Low Energy Sewage Treatment, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, People's Republic of China.
Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Apr;30(18):53524-53537. doi: 10.1007/s11356-023-26066-6. Epub 2023 Mar 1.
Urban reservoirs serve many purposes including recreation and drinking water, and larger bodies of water can alter the surrounding air temperatures, making urban areas cooler in summer and warmer in winter. However, reservoirs may also be sinks for contaminants. One such group of contaminants, the polybrominated diphenyl ethers (PBDEs), are persistent organic pollutants known to accumulate in sediments and suspended particulate matter (SPM). Few studies have been conducted on PBDEs in water, SPM, and sediment from reservoirs of Shenzhen which is a mega city in South China. To this end, 12 PBDEs were measured in water, SPM, and sediment samples during the dry season (DS) and wet season (WS), to explain the spatiotemporal distribution, congener profiles, sources, and risks of pollutants in four reservoirs (A-D) and their tributaries in the study region. The concentration of ∑PBDEs during the DS was found to be significantly higher than that during the WS. Source apportionment suggested that commercial penta-, octa-, and deca-BDEs are the major components of PBDEs, resulting mainly from atmospheric deposition, wastewater discharge, and external water-diversion projects. Further, attention should be paid to electronic equipment manufacturing factories in the study area. Risk assessment indicated risk of PBDEs (especially BDE-209) in sediment and SPM to be of concern. This study provides important data support for the control of PBDEs in natural drinking water sources.
城市水库有多种用途，包括娱乐和提供饮用水，较大的水体还会改变周围的气温，使城市地区夏季凉爽、冬季温暖。然而，水库也可能成为污染物的汇集地。多溴二苯醚（PBDEs）就是这样一类污染物，它们是持久性有机污染物，已知会在沉积物和悬浮颗粒物（SPM）中累积。对于中国南方大城市深圳水库水体、悬浮颗粒物和沉积物中的多溴二苯醚，相关研究较少。为此，在旱季（DS）和雨季（WS）对水体、悬浮颗粒物和沉积物样本中的12种多溴二苯醚进行了测量，以阐明研究区域内四个水库（A - D）及其支流中污染物的时空分布、同系物概况、来源和风险。结果发现，旱季期间∑PBDEs的浓度显著高于雨季。源解析表明，商用五溴、八溴和十溴二苯醚是多溴二苯醚的主要成分，主要来源于大气沉降、废水排放和外部调水工程。此外，研究区域内的电子设备制造厂应予以关注。风险评估表明，沉积物和悬浮颗粒物中的多溴二苯醚（尤其是BDE - 209）存在风险，值得关注。本研究为控制天然饮用水源中的多溴二苯醚提供了重要的数据支持。
