Organic micropollutants in water and sediment from Lake Malaren, Sweden
Organic micropollutants in water and sediment from Lake Malaren, Sweden
复制标题
DOI：
10.1016/j.chemosphere.2020.127293
复制
发表时间：
2020-11-01
期刊：
影响因子：
8.8
通讯作者：
Ahrens, Lutz
中科院分区：
文献类型：
--
作者：
Golovko, Oksana;Rehrl, Anna-Lena;Ahrens, Lutz
采用液相色谱-串联质谱法对瑞典梅拉伦湖水体和沉积物中111种有机微污染物（OMPs）的存在和分布进行了研究。利用固体水分配系数（K-d）和有机碳-水分配系数（K-OC）估算了污染物在湖泊舱室之间的分配。在湖水和沉积物中分别检测到30种和24种OMP。湖水中的浓度范围为低纳克/升至89纳克/升（拉莫三嗪），沉积物中的浓度范围为低纳克/克干重至28纳克/克干重（西酞普兰）。卡马西平，拉莫三嗪，咖啡因，和甲苯基三唑的主要化合物在湖梅拉伦样品（水和沉积物）。在水和沉积物样品中检测到17种外膜蛋白，包括卡马西平、避蚊胺、甲苯三唑、比卡鲁胺、咖啡因、拉莫三嗪和西替利嗪。Log K-d值在拉莫三嗪的0.84和西酞普兰的4.4之间变化，而log K-OC值在拉莫三嗪的2.1和西酞普兰的5.9之间变化。这些结果表明，吸附到沉积物中起着次要的作用，在去除所有外膜蛋白分析的水相，除了西酞普兰和西替利嗪，表现出较高的吸附潜力。基于RQ值对OMP的环境风险进行了评估。使用最大测量环境浓度进行环境风险评估的最坏情况。对于大多数目标OMP，包括甲苯三唑、比卡鲁胺、非索非那定、奥沙西泮、西替利嗪和双氯芬酸，RQ值低于0.01，表明对湖泊生态系统的风险较低或无风险。(C)2020爱思唯尔有限公司保留所有权利。
The occurrence and distribution of 111 organic micropollutants (OMPs) were evaluated in water and sediment samples from Lake Malaren, Sweden, using a liquid chromatography-tandem mass spectrometry method. The partitioning of contaminants between lake compartments was estimated using solid water distribution coefficients (K-d) and organic carbon-water partitioning coefficients (K-OC). In total, 30 and 24 OMPs were detected in lake water and sediment, respectively. Concentrations ranged from low ng/L to 89 ng/L (lamotrigine) in lake water and from low ng/g dry weight (dw) to 28 ng/g dw (citalopram) in sediment. Carbamazepine, lamotrigine, caffeine, and tolyltriazole were the dominant compounds in Lake Malaren samples (both water and sediment). Seventeen OMPs were detected in both water and sediment samples, including carbamazepine, DEET, tolyltriazole, bicalutamide, caffeine, lamotrigine, and cetirizine. Log K-d values varied between 0.84 for lamotrigine and 4.4 for citalopram, while log K-OC values varied between 2.1 for lamotrigine and 5.9 for citalopram. These results indicate that sorption to sediment plays a minor role in removal of all OMPs analyzed in the aqueous phase except for citalopram and cetirizine, which showed high sorption potential. The environmental risks of OMPs were assessed based on the RQ values. The worst-case scenario for environmental risk assessment was conducted using the maximum measured environment concentration. For most of the target OMPs, including tolyltriazole, bicalutamide, fexofenadine, oxazepam, cetirizine, and diclofenac, the RQ values were below 0.01, indicating low or no risk to lake ecosystems. (C) 2020 Elsevier Ltd. All rights reserved.