Details

Autor(en) / Beteiligte

• Lu, Yin
• Jin, Huanxiao
• Shao, Bo
• Xu, Huiying
• Xu, Xiaolu

Titel

Physiological and biochemical effects of triclocarban stress on freshwater algae

Ist Teil von

• SN applied sciences, 2019-12, Vol.1 (12), p.1685, Article 1685

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2019

Quelle

Elektronische Zeitschriftenbibliothek

Beschreibungen/Notizen

• Triclocarban (TCC) is considered as a contaminant of emerging concern (CEC) and ranked in the top 10 CEC occurrence. TCC is a high-production-volume synthetic chemical used extensively in various personal care products. The heavy use and emission of TCC pose a serious threat to the environment. To evaluate its ecotoxicity, three freshwater algae were exposed to TCC at concentrations ranging from 0.500 to 16,000 mg/L to determine its growth inhibitory effects. Chlorophyll, malondialdehyde (MDA), antioxidant enzyme activities, and other indicators were used to analyze the mechanism underlying the toxic effect of TCC. With the 96-h median effective concentrations (EC 50 ) of TCC ranging from 5.445 to 10.220 mg/L, the three types of algae exhibited obvious toxic responses, of which Chlorella vulgaris was the most sensitive. The calculated 96-h EC 50 values of TCC were 8.474 mg/L, 9.100 mg/L, and 8.760 mg/L for C. vulgaris , Scenedesmus obliquus , and Chlorella pyrenoidosa , respectively. TCC decreased the chlorophyll content, increased the MDA content, decreased the peroxidase activity, and decreased superoxide dismutase activity in the three algae, indicating that the chemical can inhibit photosynthesis and destroy the activities of antioxidant enzymes in algae. Most of the indicators showed a positive correlation with the concentration of TCC.