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Photocatalytic Removal of U(VI) from Wastewater via Synergistic Carbon-Supported Zero-Valent Iron Nanoparticles and S. Putrefaciens
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-21 , DOI: 10.1021/acsanm.9b01581
Shuhong Xiang 1, 2 , Wencai Cheng 1, 2 , Fangting Chi 2 , Xiaoqin Nie 1, 2 , Tasawar Hayat 3 , Njud S. Alharbi 4
Affiliation  

In this study, nanoscale zero-valent iron (nZVI) particles were synthesized on fullerene, carbon nanotubes, and graphene to use with S. putrefaciens for U(VI) reduction under light conditions. Of the three composites, the nZVI-carbon nanotube (nZVI-CNT) composites removed the highest amount of U(VI) of 1210.9 mg/g. The nZVI-CNT composites and S. putrefaciens exhibited a synergistic effect on U(VI) reduction under light conditions. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) results revealed the presence of U(IV) species on the reacted bio-nZVI-CNT. S. putrefaciens might decrease the interfacial energy barrier of the photocatalytic reduction process in the bio-nZVI-CNT system. This work highlights the enhanced U(VI) removal capacity of the complex nZVI-CNT and electricigen hybrid system and provides a promising strategy for wastewater treatment.

中文翻译:

通过协同碳载零价铁纳米粒子和腐殖酵母光催化去除废水中的铀(Ⅵ)

在这项研究中,在富勒烯,碳纳米管和石墨烯上合成了纳米级零价铁(nZVI)颗粒,与腐烂链球菌一起用于在光照条件下还原U(VI)。在这三种复合物中,nZVI-碳纳米管(nZVI-CNT)复合物去除的U(VI)最高,为1210.9 mg / g。所述的nZVI-CNT复合材料和S. putrefaciens表现出光条件下对U(Ⅵ)还原的协同效应。X射线光电子能谱(XPS)和X射线衍射(XRD)结果表明,已反应的生物nZVI-CNT上存在U(IV)物种。腐烂链球菌可能会降低生物nZVI-CNT系统中光催化还原过程的界面能垒。这项工作强调了复杂的nZVI-CNT和电力混合系统的U(VI)去除能力增强,并为废水处理提供了有希望的策略。
更新日期:2020-01-22
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