Photosynthetic Toxicity of Enrofloxacin on Scenedesmus obliquus in an Aquatic Environment

Zhiheng Li, Xianghong Zhang, Hong Fang, Xuanyu Lin, Xinmi Dai and Huijun Liu
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Zhiheng Li: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
Xianghong Zhang: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
Hong Fang: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
Xuanyu Lin: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
Xinmi Dai: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
Huijun Liu: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China

IJERPH, 2022, vol. 19, issue 9, 1-15

Abstract: Aquaculture facilities are a potential source of antibiotics in aquatic environments, having adverse effects on the algae species. In this study, the toxicity induced by enrofloxacin (ENR) on the algae Scenedesmus obliquus was evaluated. The uptake of ENR and the change in the growth and photosynthesis of algae were analyzed. At the exposure doses of 10–300 μg/L, the accumulated levels of ENR in algae were 10.61–18.22 μg/g and 12.09–18.34 μg/g after 48 h and 96 h of treatment, respectively. ENR inhibited the growth of algae, with a concentration for 50% effect of 119.74 μg/L, 53.09 μg/L, 64.37 μg/L, and 52.64 μg/L after 24 h, 48 h, 72 h and 96 h of treatment, respectively, indicating the self-protection and repair ability of algae in a short period of time. Furthermore, the chlorophyll contents decreased in all treatment groups, and the photosynthetic system Ⅱ parameters decreased in a dose-dependent manner under ENR stress, suggesting that ENR caused a disorder in the electron transport of the photosynthesis of algae, and the carbon fixation and assimilation processes were thus damaged. These results indicate that ENR poses a considerable risk to aquatic environments, affects the carbon sinks, and even has an adverse effect on human health.

Keywords: aquatic environment; antibiotics; Scenedesmus obliquus; photosynthetic toxicity (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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