Degradation of conjugated estrogen in visible light-driven intimately coupled photocatalysis and biodegradation system

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-06-26 DOI:10.1016/j.biortech.2024.131045

Xiangwei Ding , Qingmiao Yu , Hongqiang Ren , Jinju Geng

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Abstract

Visible light-driven intimately coupled photocatalysis and biodegradation (VDICPB) is an efficient technology for removing recalcitrant contaminants, but the degradation pathway on 17β-estradiol 3-Sulfate (E2-3S) is still not clear. In this study, VDICPB based on N-doped TiO₂ as a photocatalyst was established to investigate the removal and transformation of E2-3S in synthetic wastewater. VDICPB showed a satisfactory removal efficiency of 97.8 ± 0.4 %, which was much higher than that of independent photocatalysis (84.0 ± 2.2 %) or biodegradation system (71.4 ± 1.8 %). Steroid C/D-rings of E2-3S was broken in VDICPB since the transformation process reached terminal central pathway. Primary metabolites did not accumulate in VDICPB, resulting in a low expression of functional genes. E2-3S was mainly removed by cooperative interaction of photocatalysis and co-metabolism of biofilm. Photocatalysis led to deconjugation and microbes acted to mineralization. This study provides technical reference and theoretical support for the removal of new pollutants.

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可见光驱动的光催化和生物降解密切耦合系统降解共轭雌激素

可见光驱动的光催化与生物降解密切耦合技术（VDICPB）是一种去除难降解污染物的高效技术，但其对17β-雌二醇-3-硫酸盐（E2-3S）的降解途径尚不清楚。本研究以掺杂 N 的 TiO 为光催化剂，建立了 VDICPB，以研究合成废水中 E2-3S 的去除和转化。VDICPB 的去除率为 97.8 ± 0.4 %，远高于独立光催化（84.0 ± 2.2 %）或生物降解系统（71.4 ± 1.8 %）。在 VDICPB 中，E2-3S 的类固醇 C/D 环被破坏，因为转化过程达到了终端中心途径。初级代谢物在 VDICPB 中没有积累，导致功能基因表达量较低。E2-3S 主要通过光催化和生物膜的共代谢作用去除。光催化作用导致解聚，微生物作用导致矿化。这项研究为清除新污染物提供了技术参考和理论支持。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.