Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Bioresour Technol. 2017 Aug;238:407-415. doi: 10.1016/j.biortech.2017.04.045. Epub 2017 Apr 17.
Long-term exposure experiments with single and combined pollutants of copper (Cu)/perfluorooctane sulfonate (PFOS) were conducted to explore the influence on activated sludge in SBRs. Compared with the control, the removal of organics, nitrogen and phosphorus in the presence of PFOS exhibited no apparent difference, but reduced in different degrees when Cu and Cu/PFOS existed. PFOS exposure deteriorated the settling performance of activated sludge with SVI value and amount of extracellular polymeric substance (EPS) increasing, but posed little impacts on microbial activity (dehydrogenase, protease) and antioxidant activity (SOD, CAT). Under Cu and Cu/PFOS loading, dehydrogenase and protease activity were observed to decrease as well as SOD and CAT activity. The sequencing results revealed that bacterial richness and community diversity reduced under Cu and Cu/PFOS exposure. Overall, adverse effect of combined pollution was lower than that of single Cu in long-time due to antagonistic effect existed between Cu and PFOS.
进行了铜（Cu）/全氟辛烷磺酸（PFOS）单一和复合污染物的长期暴露实验，以探究其对 SBR 中活性污泥的影响。与对照组相比，PFOS 的存在对有机物、氮和磷的去除没有明显差异，但在 Cu 和 Cu/PFOS 存在的情况下，去除程度有所降低。PFOS 的暴露会恶化活性污泥的沉降性能，SVI 值和胞外聚合物（EPS）的量增加，但对微生物活性（脱氢酶、蛋白酶）和抗氧化活性（SOD、CAT）的影响较小。在 Cu 和 Cu/PFOS 的加载下，观察到脱氢酶和蛋白酶活性下降，同时 SOD 和 CAT 活性也下降。测序结果表明，细菌丰富度和群落多样性在 Cu 和 Cu/PFOS 暴露下降低。总的来说，由于 Cu 和 PFOS 之间存在拮抗作用，长期来看，复合污染的不利影响低于单一 Cu。
