Efficient utilization of photoelectron-hole at semiconductor-microbe interface for pyridine degradation with assistance of external electric field

IF 7.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X Pub Date : 2024-01-01 DOI:10.1016/j.wroa.2024.100214

Hefei Shi , Wenbo Fan , Xinbai Jiang , Dan Chen , Cheng Hou , Yixuan Wang , Yang Mu , Jinyou Shen

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Abstract

In this study, enhanced pyridine bio-photodegradation with assistance of electricity was achieved. Meanwhile, photoelectron-hole played a vital role in accelerating pyridine biomineralization. The significant separation of photoelectron-hole was achieved with an external electric field, which provided sufficient electron donors and acceptors for pyridine biodegradation. The enhanced electron transport system activity also revealed the full utilization of photoelectron-hole by microbes at semiconductor-microbe interface with assistance of electricity. Microbial community analysis confirmed the enrichment of functional species related to pyridine biodegradation and electron transfer. Microbial function analysis and microbial co-occurrence networks analysis indicated that upregulated functional genes and positive interactions of different species were the important reasons for enhanced pyridine bio-photodegradation with external electric field. A possible mechanism of enhanced pyridine biodegradation was proposed, i.e., more photoelectrons and holes of semiconductors were utilized by microbes to accelerate reduction and oxidation of pyridine with the assistance of electrical stimulation. The excellent performance of the photoelectrical biodegradation system showed a potential alternative for recalcitrant organic wastewater treatment.

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在外加电场的帮助下，高效利用半导体-微生物界面上的光电子-空穴降解吡啶

在这项研究中，借助电力实现了吡啶的生物光降解。同时，光电子-空穴在加速吡啶生物矿化过程中发挥了重要作用。在外加电场的作用下，光电子-空穴实现了明显分离，为吡啶的生物降解提供了充足的电子供体和受体。电子传递系统活性的增强也表明，在电能的帮助下，半导体-微生物界面上的微生物充分利用了光电子空穴。微生物群落分析证实，与吡啶生物降解和电子传递有关的功能物种得到了丰富。微生物功能分析和微生物共现网络分析表明，功能基因上调和不同物种之间的良性相互作用是外电场增强吡啶生物光降解的重要原因。提出了增强吡啶生物降解的可能机制，即在电刺激的帮助下，微生物利用半导体的更多光电子和空穴加速吡啶的还原和氧化。光电生物降解系统的卓越性能表明，它是一种处理难降解有机废水的潜在替代方法。

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来源期刊

Water Research X Environmental Science-Water Science and Technology

CiteScore

12.30

自引率

1.30%

发文量

期刊介绍： Water Research X is a sister journal of Water Research, which follows a Gold Open Access model. It focuses on publishing concise, letter-style research papers, visionary perspectives and editorials, as well as mini-reviews on emerging topics. The Journal invites contributions from researchers worldwide on various aspects of the science and technology related to the human impact on the water cycle, water quality, and its global management.