Effects of polystyrene nanoplastics on the physiological and biochemical characteristics of microalga Scenedesmusquadricauda

The contamination of the aquatic environment with microplastics has become a global environmental concern. Microplastic particles can be shredded to form smaller nanoplastics, and knowledge on their impacts on phytoplankton, especially freshwater microalgae, is still limited. To investigate this iss...

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Bibliographic Details
Published in:Environmental pollution (1987) 2023-02, Vol.319, p.120987-120987, Article 120987
Main Authors: Li, Ru-ru, Wang, Bin-liang, Nan, Fang-ru, Lv, Jun-ping, Liu, Xu-dong, Liu, Qi, Feng, Jia, Xie, Shu-lian
Format: Article
Language:English
Subjects:
Aggregation
Antioxidants - metabolism
Antioxidization
Chlorophyll - metabolism
Microalgae - metabolism
Microplastic
Microplastics - metabolism
Microplastics - toxicity
Nanoplastic
Plastics - metabolism
Polystyrenes - chemistry
Promotion
Scenedesmus - metabolism
Scenedesmus quadricauda
Water Pollutants, Chemical - metabolism
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Summary:The contamination of the aquatic environment with microplastics has become a global environmental concern. Microplastic particles can be shredded to form smaller nanoplastics, and knowledge on their impacts on phytoplankton, especially freshwater microalgae, is still limited. To investigate this issue, the microalga Scenedesmus quadricauda was exposed to polystyrene nanoplastics (PS-NPs) of five concentrations (10, 25, 50, 100, and 200 mg/L). The growth; the contents of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD); the chlorophyll content; and concentrations of soluble protein and soluble polysaccharide were accordingly measured. The results showed that the microalgal density increased with the increase of the polystyrene nanoplastic concentrations, and the physiological features of alga were enhanced after the stimulation of nanoplastics. Furthermore, a high concentration (200 mg/L) of nanoplastics increased the contents of chlorophyll, soluble protein, and polysaccharide (P 
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2022.120987