Metabolic Mechanism of Sulfadimethoxine Biodegradation by Chlorella sp. L38 and Phaeodactylum tricornutum MASCC-0025

Frontiers in Microbiology

Di Wu¹  Yan Shi¹  Bing Li¹  Yan Li¹  Jiasi Sun²  Chenlin Wang²  Chunfeng Song² 

[1]Tianjin Academy of Agricultural Sciences, The Institute of Agriculture Resources and Environmental Sciences, Tianjin, China

[2]Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China

关键词: sulfadimethoxine;    Chlorella sp.;    Phaeodactylum tricornutum;    microalgae;    NaCl;    biodegradation;   

DOI  :  10.3389/fmicb.2022.840562

来源: DOAJ

【 摘 要 】

Antibiotic resistance is one of the most important environmental challenges. Microalgae has been considered as a promising green media for environmental purification. In this work, sulfadimethoxine (SDM) biodegradation potential of Chlorella sp. L38 and Phaeodactylum tricornutum MASCC-0025 is investigated. Experimental results indicated that the tested freshwater and marine microalgae strains presented stress response to SDM addition. For Chlorella sp. L38, it has a good adaptability to SDM condition via antioxidant enzyme secretion (SOD, MDA, and CAT up to 23.27 U/mg, 21.99 μmol/g, and 0.31 nmol/min/mg) with removal rate around 88%. P. tricornutum MASCC-0025 exhibited 100% removal of 0.5 mg/L SDM. With increasing salinity (adding a certain amount of NaCl) of cultivation media, the removal rate of SDM by microalgae increased. Although its adaptive process was slower than Chlorella sp. L38, the salinity advantage would facilitate enzyme accumulation. It indicated that microalgae could be used to remove SDM from freshwater and marine environment via suitable microalgae strain screening.

【 授权许可】

Unknown