Acute impacts of mixed heavy metals and diclofenac on sludge activity and enzyme activity involved with biological nitrogen removal,Environmental Science: Water Research & Technology

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Acute impacts of mixed heavy metals and diclofenac on sludge activity and enzyme activity involved with biological nitrogen removal
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2021-08-20 , DOI: 10.1039/d1ew00359c
Yueyue Wang ₁ , Zichao Wang ₁ , Huan Yang ₁ , Shengyu Yuan ₁ , Youtao Song ₁ , Lin Wang ₂ , Lu Zhang ₂

Affiliation

The acute impacts of mixed heavy metals and diclofenac (DCF) on sludge activity and enzyme activity involved with nitrogen removal were investigated. Synergistic inhibition on sludge activity and enzyme activity of nitrification and denitrification was found between divalent copper and DCF, and the inhibition by mixed hexavalent chromium and DCF was antagonistic. Joint divalent zinc and DCF had synergistic effects on sludge activity and enzyme activity in the nitrification process, and they showed antagonistic inhibitions on denitrifying sludge activity and enzyme activity. Metals, DCF and mixed metals/DCF excited reactive oxygen species and lactate dehydrogenase production from activated sludge. Protein in extracellular polymeric substances (EPS) was the main feedback of bacteria to metals, DCF and mixed metals/DCF, and the protein role did not change according to the type of metal or mixture composition. Protein and polysaccharide groups played important roles in the interaction of EPS with metals and DCF.

中文翻译：

混合重金属和双氯芬酸对污泥活性和生物脱氮相关酶活性的急性影响

研究了混合重金属和双氯芬酸 (DCF) 对污泥活性和脱氮相关酶活性的急性影响。二价铜与DCF对污泥活性和硝化反硝化酶活性有协同抑制作用，六价铬与DCF混合抑制呈拮抗作用。二价锌和DCF联合对硝化过程中的污泥活性和酶活性具有协同作用，对反硝化污泥活性和酶活性表现出拮抗抑制作用。金属、DCF 和混合金属/DCF 从活性污泥中激发活性氧和乳酸脱氢酶的产生。胞外聚合物（EPS）中的蛋白质是细菌对金属、DCF和混合金属/DCF的主要反馈，并且蛋白质的作用没有根据金属的类型或混合物组成而改变。蛋白质和多糖基团在 EPS 与金属和 DCF 的相互作用中起重要作用。

更新日期：2021-08-26

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