College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
Huzhou Municipal Ecology and Environment Bureau, Zhejiang Province, Huzhou, 313000, China.
Environ Sci Pollut Res Int. 2023 Nov;30(55):117772-117784. doi: 10.1007/s11356-023-30458-z. Epub 2023 Oct 24.
Emerging contaminants (ECs) in aquatic environments have attracted attention due to their wide distribution and potential ecotoxicities. Sewage treatment plants (STPs) are proven to be the major source of ECs in the aquatic environment, while there remains insufficient understanding of the removal and risk assessment of ECs in STPs. Here, we clarified the degradation and risk impact of 13 ECs in two aquatic product processing sewage treatment plants (APPSTPs) along the southeast coast of China. The concentrations of ECs followed the order: endocrine-disrupting chemicals (1877.85-15,398.02 ng/L in influent, 3.37-44.47 ng/L in effluent) > > sulfonamide antibiotics (SAs, 75.14-906.19 ng/L in influent, 1.14-15.33 ng/L in effluent) > pharmaceutical and personal care products (PPCPs, 44.47-589.93 ng/L in influent, 2.54-34.16 ng/L in effluent) ≈ fluoroquinolone antibiotic (54.76-434.83 ng/L in influent, 10.75-32.82 ng/L in effluent) > other antibiotics (16.21-51.96 ng/L in influent, 0.68-6.17 ng/L in effluent). Moreover, the concentrations of PPCPs (decreased by 55.33-87.65% in peak fishing season) and antibiotics (increased by 44.99% in peak fishing season) were affected by fishing activities. In particular, the sequencing batch reactor (SBR) process had a better removal effect than the anaerobic-anoxic-oxic (A/O) process on the treatment of some contaminants (e.g., norfloxacin and nonylphenol). Risk evaluations of ECs demonstrated that nonylphenol and SAs were at high- and low-risk states, respectively. Overall, our results provide important information for the degradation treatment of ECs, which is essential for pollutant management policy formulation.
新兴污染物（ECs）在环境中分布广泛，具有潜在的生态毒性，因此受到了广泛关注。污水处理厂（STPs）被证实是水生环境中 ECs 的主要来源，但对于 STPs 中 ECs 的去除和风险评估仍缺乏足够的认识。在这里，我们阐明了沿中国东南沿海的两个水产加工污水处理厂（APPSTPs）中 13 种 ECs 的降解和风险影响。ECs 的浓度顺序为：内分泌干扰物（进水 1877.85-15398.02ng/L，出水 3.37-44.47ng/L）>磺胺类抗生素（SAs，进水 75.14-906.19ng/L，出水 1.14-15.33ng/L）>药物和个人护理产品（PPCPs，进水 44.47-589.93ng/L，出水 2.54-34.16ng/L）≈氟喹诺酮类抗生素（进水 54.76-434.83ng/L，出水 10.75-32.82ng/L）>其他抗生素（进水 16.21-51.96ng/L，出水 0.68-6.17ng/L）。此外，PPCPs（在捕鱼高峰期下降 55.33-87.65%）和抗生素（在捕鱼高峰期增加 44.99%）的浓度受到捕鱼活动的影响。特别是，与厌氧-缺氧-好氧（A/O）工艺相比，序批式反应器（SBR）工艺对一些污染物（如诺氟沙星和壬基酚）的处理具有更好的去除效果。ECs 的风险评估表明，壬基酚和磺胺类抗生素分别处于高风险和低风险状态。总的来说，我们的研究结果为 ECs 的降解处理提供了重要信息，这对于制定污染物管理政策至关重要。
