生物炭
无色杆菌
化学
抗氧化剂
生物降解
食品科学
降级(电信)
土霉素
生物修复
氧化应激
谷胱甘肽
环境化学
假单胞菌
生物化学
酶
污染
生物
抗生素
细菌
电信
生态学
有机化学
热解
计算机科学
遗传学
作者
Shudong Zhang,Jinju Hou,Xiaolin Zhang,Cheng Liu,Wenjin Hu,Qiuzhuo Zhang
标识
DOI:10.1016/j.biortech.2023.129673
摘要
Contamination of the environment with large amounts of residual oxytetracycline (OTC) and the corresponding resistance genes poses a potential threat to natural ecosystems and human health. In this study, an effective OTC-degrading strain, identified as Achromobacter denitrificans OTC-F, was isolated from activated sludge. In the degradation experiment, the degradation rates of OTC in the degradation systems with and without biochar addition were 95.01–100% and 73.72–99.66%, respectively. Biochar promotes the biodegradation of OTC, particularly under extreme environmental conditions. Toxicity evaluation experiments showed that biochar reduced biotoxicity and increased the proportion of living cells by 17.36%. Additionally, biochar increased the activity of antioxidant enzymes by 34.1–91.0%. Metabolomic analysis revealed that biochar promoted the secretion of antioxidant substances such as glutathione and tetrahydrofolate, which effectively reduced oxidative stress induced by OTC. This study revealed the mechanism at the molecular level and provided new strategies for the bioremediation of OTC in the environment.
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