Interactive effects of roxithromycin and freshwater microalgae, Chlorella pyrenoidosa: Toxicity and removal mechanism

Roxithromycin (ROX) has received increasing concern due to its large usage, ubiquitous detection in environment and high ecotoxicology risk. This study investigated the acute and chronic effects of ROX on the growth, chlorophyll, antioxidant enzymes, and malonaldehyde (MDA) content of Chlorella pyre...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2020-03, Vol.191, p.110156, Article 110156
Main Authors: Li, Jiping, Min, Zhongfang, Li, Wei, Xu, Lijie, Han, Jiangang, Li, Pingping
Format: Article
Language:English
Subjects:
Algae
Antibiotics
Biodegradation, Environmental
Chlorella - drug effects
Chlorella - metabolism
Chlorophyll - metabolism
Ecotoxicity
Ecotoxicology
Fresh Water - chemistry
Malondialdehyde - metabolism
Microalgae - drug effects
Microalgae - metabolism
Removal mechanism
Roxithromycin
Roxithromycin - analysis
Roxithromycin - toxicity
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - toxicity
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Summary:Roxithromycin (ROX) has received increasing concern due to its large usage, ubiquitous detection in environment and high ecotoxicology risk. This study investigated the acute and chronic effects of ROX on the growth, chlorophyll, antioxidant enzymes, and malonaldehyde (MDA) content of Chlorella pyrenoidosa, as well as the removal mechanism of ROX during microalgae cultivation. The calculated 96 h median effective concentration of ROX on yield (EyC50) and specific growth rate (ErC50) of C. pyrenoidosa was 0.81 and 2.87 mg/L, respectively. After 96 h exposure, 1.0 ~ 2.0 mg/L of ROX significantly inhibited the synthesis of chlorophyll and promoted the activities of SOD and CAT (p 
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2019.110156