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Long-term alkaline conditions inhibit the relative abundances of tetracycline resistance genes in saline 4-chlorophenol wastewater treatment.
Bioresource Technology ( IF 11.4 ) Pub Date : 2020-01-12 , DOI: 10.1016/j.biortech.2020.122792
Yahe Li 1 , Jianguo Zhao 2 , Yu Li 2 , Baodan Jin 2 , Ke Zhang 2 , Hongzhong Zhang 2
Affiliation  

Considering the occurrence and spread of antibiotic resistance genes (ARGs) pose significant risks to public health, the effects of long-term exposure to alkaline conditions on the relative abundances of tetracycline resistance genes (TRGs) were studied in saline 4-chlorophenol (4-CP) wastewater treatment. Alkaline conditions were maintained by supplying the co-metabolic carbon source of sodium acetate. Results showed that except for the 4-CP, the removal of pollutants was significantly inhibited, and the relative abundances of the most TRGs were repressed. In addition, the removal of pollutants and the relative abundances of TRGs were moderately affected by the NaCl addition. The proteins in the extracellular polymeric substances (EPS) played key roles in reducing the relative abundances of TRGs, which were altered by the microbial diversity. In conclusion, for the pollutants removal and ARGs reduction in refractory industrial wastewater treatment, alkaline conditions should be maintained by selecting suitable co-metabolic carbon sources.

中文翻译:

长期碱性条件抑制了4-氯苯酚废水中四环素抗性基因的相对丰度。

考虑到抗生素抗性基因(ARGs)的发生和扩散对公众健康构成重大风险,因此在盐浓度为4-氯苯酚(4-的情况下,研究了长期暴露于碱性条件下对四环素抗性基因(TRGs)相对丰度的影响CP)废水处理。通过提供乙酸钠的共代谢碳源来维持碱性条件。结果表明,除4-CP以外,其他污染物的去除均受到显着抑制,大多数TRG的相对丰度均得到抑制。此外,NaCl的添加对污染物的去除和TRG的相对丰度有中等程度的影响。细胞外聚合物(EPS)中的蛋白质在降低TRG的相对丰度中起关键作用,而TRG的相对丰度因微生物多样性而改变。
更新日期:2020-01-13
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