School of Engineering, China Pharmaceutical University, Nanjing 210009, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China.
School of Engineering, China Pharmaceutical University, Nanjing 210009, China.
Sci Total Environ. 2020 Jun 25;723:138164. doi: 10.1016/j.scitotenv.2020.138164. Epub 2020 Mar 23.
Bisphenol analogues (BPs) pollution in the aquatic environment is increasingly a worldwide concern. There is an urgent need to understand the fate of BPs in the aquatic environment. In this study, we studied the biodegradation of eight BPs in Taihu Lake and discussed the effect of humic acid (HA), which was extracted from Taihu Lake sediment, on the disappearance of BPs. Under aerobic conditions, bisphenol AF (BPAF) and bisphenol S (BPS) were recalcitrant to biodegradation in the lake water. The half-lives for bisphenol F (BPF), bisphenol A (BPA), bisphenol B (BPB), bisphenol E (BPE), bisphenol Z (BPZ), and bisphenol M (BPM) ranged from 34 to 75 days in the Taihu Lake water collected in October 2018 and 12-72 days in that collected in May 2019. The biodegradation of BPs in summer was significantly higher than that in autumn. The presence of HA promoted the disappearance of BPs from Taihu Lake water by adsorbing and binding BPs. The disappearance rate of BPs accelerated with increasing concentrations of HA. However, the presence of HA decreased the biodegradation of BPs. When the concentration of HA was 10 mg/L, the single-adsorption capacities for BPS, BPA, BPB, BPM and BPAF were 3.18-10.33 mg/g in the Taihu Lake water with little desorption. BP adsorption and desorption in the BP mixtures were different from that in the single BPs. Competitive desorption occurred among the mixtures. The results of this study are the first to indicate the biodegradation of eight BPs in natural lake water and the possible effect of HA on the fate of BPs in the environment.
双酚类似物 (BPs) 对水环境污染的影响日益受到全球关注。因此，迫切需要了解 BPs 在水环境中的归趋。本研究考察了太湖水体中 8 种 BPs 的生物降解情况，并探讨了从太湖水底沉积物中提取的腐殖酸 (HA) 对 BPs 去除的影响。在好氧条件下，双酚 AF（BPAF）和双酚 S（BPS）在太湖水体中难以被生物降解。2018 年 10 月采集的太湖水样中，BPF、BPA、BPB、BPE、BPZ 和 BPM 的半衰期为 34-75 天，2019 年 5 月采集的太湖水样中为 12-72 天。夏季 BPs 的生物降解速率明显高于秋季。HA 的存在通过吸附和结合 BPs 促进了 BPs 从太湖水体中的去除，且随着 HA 浓度的增加，BPs 的去除速率加快。然而，HA 的存在会降低 BPs 的生物降解。当 HA 浓度为 10 mg/L 时，BPS、BPA、BPB、BPM 和 BPAF 在太湖水体中的单一吸附容量分别为 3.18-10.33 mg/g，且解吸量较少。BP 混合物在太湖水体中的吸附和解吸与单一 BPs 不同，混合物之间发生了竞争解吸。本研究结果首次表明了 8 种 BPs 在天然湖水中的生物降解情况，以及 HA 对环境中 BPs 归趋的可能影响。
