Contamination and risk profiles of triclosan and triclocarban in sediments from a less urbanized region in China
Contamination and risk profiles of triclosan and triclocarban in sediments from a less urbanized region in China
复制标题
中国城市化程度较低地区沉积物中三氯生和三氯卡班的污染和风险概况
DOI：
10.1016/j.jhazmat.2018.06.020
复制
发表时间：
2018-09-05
影响因子：
13.6
通讯作者：
Cai, Zongwei
中科院分区：
文献类型：
--
作者：
Chen, Zhi-Feng;Wen, Hong-Biao;Cai, Zongwei
三氯生和三氯卡班是环境健康日益关注的重点环境污染物。使用后，这些化学物质进入水生环境，并因其疏水性而容易在河床沉积物中分布，从而构成潜在的生态风险。本研究调查了三氯生和三氯卡班在中国南方一个城市化程度较低地区的沉积物环境中的分布及风险。发现三氯生和三氯卡班含量较高的采样点位于支流。与从人口更密集地区获得的其他监测结果相比，研究区域内三氯生和三氯卡班的残留量较低，这表明这两种化学物质在沉积物中的留存与人类活动有关。风险商数结果显示，沉积物中的三氯生残留对水生生物构成高风险，而对底栖生物的风险则相当低。沉积物中的三氯卡班残留对水生生物和底栖生物构成的风险为极小到中等。总之，使用任何一种风险商数计算方法，在某些人口密度较低的采样点都能发现抗菌剂构成的中等风险。研究结果可能有助于政府制定基于证据的政策。
Triclosan and triclocarban are priority environmental contaminants of increasing concern to environmental health. After application, the chemicals enter the aquatic environment and easily distribute in bed sediment due to their hydrophobicity, and thus pose potential ecological risks. This study investigated the distribution and risks of triclosan and triclocarban in the sediment environment of a less urbanized region in South China. The sampling sites with high levels of triclosan and triclocarban were found to locate in the tributaries. When compared to other monitoring results obtained from more densely populated regions, the residues of triclosan and triclocarban in the investigated region were low, suggesting that these two chemicals conservation in sediment is related to anthropic activities. The results of risk quotients showed that high risks to aquatic organisms were posed by triclosan residues in sediment, while the risks to benthic organisms were quite low. Triclocarban residues in sediment posed minimal to medium risks to aquatic and benthic organisms. In summary, using either of the calculation methods of risk quotients, medium risks posed by the antimicrobials can be found in certain sampling sites with low population densities. The results may be useful in the development of evidence-based policies for the government.