Effects of long-term perfluorooctane sulfonate (PFOS) exposure on activated sludge performance, composition, and its microbial community.
Effects of long-term perfluorooctane sulfonate (PFOS) exposure on activated sludge performance, composition, and its microbial community.
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DOI：
10.1016/j.envpol.2021.118684
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发表时间：
2021-12
影响因子：
8.9
通讯作者：
Bianhe Lu;J. Qian;Fei He;Peifang Wang;Yuxuan He;Sijing Tang;X. Tian
中科院分区：
文献类型：
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作者：
Bianhe Lu;J. Qian;Fei He;Peifang Wang;Yuxuan He;Sijing Tang;X. Tian
全氟辛烷磺酸（PFOS）在废水处理厂的广泛存在和持续存在，以及其毒性和生物积累潜力，有必要研究其对生物反应器性能的影响。采用48 d暴露试验，研究了序批式反应器中低（10 μg L-1）和高（1000 μg L-1） PFOS浓度对活性污泥性能、组成和微生物群落的影响。结果表明，与对照组相比，添加低、高浓度PFOS可使总氮去除率分别降低22.48% （p < 0.01）和16.30% (p < 0.01)，总磷去除率分别提高1.87% （p < 0.05）和7.07% （p < 0.05）。PFOS的加入也导致活性污泥脱水性能的恶化。组成和光谱测量表明，全氟辛烷磺酸的投加量改变了活性污泥的组成。此外，全氟辛烷磺酸改变了活性污泥微生物群落的结构和功能以及关键酶的活性。
The widespread presence and persistence of perfluorooctane sulfonate (PFOS) in wastewater treatment plants, as well as its toxicity and bioaccumulation potential, necessitates the investigation on their impact on bioreactor performance. A 48-day exposure test was adopted to study the effects of low (10 μg L-1) and high (1000 μg L-1) PFOS concentrations in a sequencing batch reactor on the performance, composition, and microbial community of activated sludge. The results suggested that adding PFOS at low and high concentrations lowered the removal efficiency of total nitrogen by 22.48% (p < 0.01) and 16.30% (p < 0.01) respectively, while enhanced that of total phosphorus by 1.87% (p > 0.05) and 7.07% (p < 0.05) respectively, compared with the control group. The addition of PFOS also led to the deterioration of activated sludge dewatering performance. Composition and spectroscopic measurements revealed that the PFOS dosage changed the composition of the activated sludge. Furthermore, the PFOS altered the structure and function of the activated sludge microbial community as well as key enzyme activities.