Shi Chenyi, Xu Yuan, Liu Mingqing, Chen Xiujuan, Fan Mengjie, Liu Jining, Chen Yingwen
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
J Hazard Mater. 2021 Feb 5;403:124053. doi: 10.1016/j.jhazmat.2020.124053. Epub 2020 Oct 1.
As a substitute for bisphenol A (BPA), bisphenol S (BPS) has a longer half-life, higher chemical inertness and better skin permeability than BPA, and it also has a strong endocrine disruption effect. Relatively few studies have focused on the main processing technology for BPS biodegradation, and the findings indicate that the biodegradation efficiency of BPS was relatively low. Therefore, this paper used an NZVI-HA composite-modified bio-anode to enhance the anaerobic degradation of BPS in a Bioelectrochemical Systems (BES). The results showed that the degradation efficiency of BPS was improved from 31.1% to 92.2% with the NZVI-HA modification compared with the control group (CC-BES). FTIR and XPS analyzes demonstrated that HA can accelerate the reduction rate of Fe and increase the ratio of Fe/Fe. In addition, HA can form Fe-O-HA complexes with NZVI to promote electron transfer. An analysis of the NZVI-HA-BES intermediate metabolites revealed that complex modification properties altered the BPS degradation pathway. An analysis of microbial diversity indicated that the bacteria related to the degradation of BPS may be Terrimonas, Lysobacter, and Acidovorax.
作为双酚A（BPA）的替代品，双酚S（BPS）具有比BPA更长的半衰期、更高的化学惰性和更好的皮肤渗透性，并且它还具有很强的内分泌干扰作用。相对较少的研究关注BPS生物降解的主要处理技术，研究结果表明BPS的生物降解效率相对较低。因此，本文使用纳米零价铁-腐殖酸（NZVI-HA）复合改性生物阳极来增强生物电化学系统（BES）中BPS的厌氧降解。结果表明，与对照组（CC-BES）相比，经NZVI-HA改性后，BPS的降解效率从31.1%提高到了92.2%。傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）分析表明，腐殖酸（HA）可以加速铁的还原速率并提高Fe²⁺/Fe³⁺的比例。此外，HA可以与NZVI形成Fe-O-HA络合物以促进电子转移。对NZVI-HA-BES中间代谢产物的分析表明，复合改性特性改变了BPS的降解途径。微生物多样性分析表明，与BPS降解相关的细菌可能是地嗜皮菌属、溶杆菌属和嗜酸菌属。
