The Cu-doped SrTiO 3 photocatalysts were prepared by hydrothermal and calcination methods for photocatalytic reduction of U(VI) in mine pit water. Specifically, Cu doping decreases the bandgap of the catalyst, broadening the light absorption spectrum and accelerating photo-induced charge carrier separation. Consequently, these modifications significantly enhance the performance of photocatalytic uranium reduction. With methanol as a hole scavenger, the removal rate of U(VI) in 100 mg/L simulated pit water was 89.4%. When there is no hole scavenger, the photocatalyst still achieves a 71.3% uranium removal rate in actual mine pit water (25 mg/L). In addition, the photocatalyst has a certain degradation effect on the natural organic matter (NOM) in the actual mine water. XPS analysis reveals that uranium reduction involves Ti(III)/Ti(IV) and Cu(I)/Cu(II) redox processes. The redox processes of these metals may enhance the reducing properties of photocatalysts. This study presents a new method for large-scale mine pit water treatment via Cu-doped SrTiO 3 photocatalysts.

Mingyu Xie

Qi Liu

Jingyuan Liu

Jing Yu

Rongrong Chen

Jiahui Zhu

Rumin Li

Jun Wang

Separation and Purification Technology

SEPARATION AND PURIFICATION TECHNOLOGY 是一本致力于传播分离研究成果和发现的出版物。它的覆盖范围延伸到均相溶液和异相混合物的分离和纯化的所有方面。分离和纯化技术欢迎来自世界各地的研究人员对分离和纯化相关现象的实验研究和理论分析以及分离操作中使用的工艺开发和模拟、设备设计和制造以及材料制备和修改等方面的贡献。 .

Separation and Purification Technology is an academic journal dedicated to disseminating research findings and discoveries in the field of separation. It covers all aspects of separation and purification of homogeneous solutions and heterogeneous mixtures. The journal welcomes contributions from researchers worldwide on experimental studies and theoretical analyses related to separation and purification phenomena, as well as on process development and simulation, equipment design and manufacturing, and material preparation and modification used in separation operations.

《Separation and Purification Technology》是一本专注于传播分离研究成果和发现的学术期刊。它涵盖了均相溶液和异相混合物的分离与纯化的各个方面。该期刊欢迎来自全球的研究人员提交与分离和纯化相关现象的实验研究和理论分析，以及在分离操作中使用的工艺开发、模拟、设备设计与制造、材料制备和修改等方面的贡献。

Category	Quartile
工程技术	1
工程技术, 工程化工	2

Copper-doped nano-cubic SrTiO3 photocatalyst efficiently removes U(VI) from uranium mine pit water

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Journal Info

Category	Quartile
ENGINEERING, CHEMICAL	1