Istanbul Technical University, Civil Engineering Faculty, Department of Environmental Engineering, Maslak, 34469, Istanbul, Turkey.
Istanbul Technical University, Civil Engineering Faculty, Department of Environmental Engineering, Maslak, 34469, Istanbul, Turkey.
J Environ Manage. 2018 Apr 1;211:218-224. doi: 10.1016/j.jenvman.2018.01.056. Epub 2018 Feb 4.
The use of antibacterial agents in consumer products may lead to adverse effects in waters receiving treated wastewater. Triclosan is one of the antibacterial agents used widely in the world and its high usage leads to relatively high concentrations in wastewater effluents. In this study, the probable effect of triclosan in receiving waters was assessed using different organisms. The EC50 values were 668 ± 80 μg/L and 7.8 ± 0.1 μg/L, for Vibrio fischeri and Raphidocelis subcapitata, respectively, indicating the higher sensitivity of the alga. The toxicity of triclosan upon exposure to UV light decreased for both species, as suggested by the increase in EC50 values (1300 ± 50 μg/L and 8.7 ± 0.6 μg/L for V. fischeri and R. subcapitata, respectively). The effect of photolysis on toxicity reduction was higher for V. fischeri and the EC50 values were similar for direct and indirect photolysis. LC-MS/MS analysis of samples with and without UV exposure suggested a decrease in triclosan concentration as well as formation of photolysis byproducts upon photolysis.
抗菌剂在消费产品中的使用可能会导致经处理废水接收水域产生不良影响。三氯生是世界上广泛使用的抗菌剂之一，其高用量导致废水中的浓度相对较高。在这项研究中，使用不同的生物体评估了三氯生在接收水中的可能影响。发光菌的 EC50 值为 668 ± 80 μg/L，微囊藻的 EC50 值为 7.8 ± 0.1 μg/L，表明藻类对三氯生更敏感。两种生物的三氯生暴露于紫外线时的毒性都降低了，这表明 EC50 值增加（发光菌和微囊藻分别为 1300 ± 50 μg/L 和 8.7 ± 0.6 μg/L）。光解对毒性降低的影响对发光菌更高，并且直接和间接光解的 EC50 值相似。对有和没有紫外线暴露的样品进行 LC-MS/MS 分析表明，三氯生浓度降低，并且在光解过程中形成光解副产物。
