Photo-Assisted Enhancement of Uranium Mine Wastewater Purification by a Self-Assembled Shewanella putrefaciens-CdS Biohybrid System

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL ACS Catalysis Pub Date : 2024-09-04 DOI:10.1021/acsmaterialslett.4c00594

Guolin Yang, Ling Wei, Yingtong Lv, Yizhou He, Boming Zhu, Xudong Wu, Junhui He, Qing Wang, Wenkun Zhu, Tao Chen

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Abstract

Integrated light-trapping capability semiconductor and bioreduction advantages of photosensitive biohybrid systems are a promising approach to purify uranium mine wastewater. In this study, we developed a photosensitized Shewanella putrefaciens-CdS biohybrid system for the removal of uranium, which achieved more than 90% U(VI) removal efficiency in real uranium mine wastewater. By use of in situ Kelvin probe force microscopy (KPFM), we identified that photoelectrons generated over CdS were transferred to Shewanella putrefaciens (S. putrefaciens) to enhance the excellent uranium removal performance of the S. putrefaciens–CdS biohybrid. In addition, we performed transcriptomics analysis on the genes (cytochrome c, ABC transport, and electron transfer) linked to U(VI) reduction in the biohybrid system and discovered that these genes were significantly upregulated. This work deepens our understanding of the electron transfer pathways and the physiological activities of the biohybrid system, which provides an important reference for the purification of uranium mine wastewater.

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自组装雪旺菌-CdS 生物杂交系统在光辅助下提高铀矿废水净化能力

光敏生物杂交系统集成了半导体捕光能力和生物还原优势，是净化铀矿废水的一种很有前景的方法。在这项研究中，我们开发了一种用于去除铀的光敏化普氏雪旺菌-CdS 生物杂交系统，该系统在实际铀矿废水中的铀(VI)去除率达到 90% 以上。通过使用原位开尔文探针力显微镜（KPFM），我们发现在CdS上产生的光电子被转移到腐生雪旺菌（S. putrefaciens）上，从而提高了腐生雪旺菌-CdS生物杂交系统卓越的铀去除性能。此外，我们还对生物杂交系统中与铀(VI)还原相关的基因（细胞色素c、ABC转运和电子传递）进行了转录组学分析，发现这些基因显著上调。这项工作加深了我们对生物杂交系统的电子传递途径和生理活性的理解，为铀矿废水的净化提供了重要参考。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.