Hydrothermal preparation of NiO/La-NaTaO3 composite photocatalyst for degradation of ammonium dibutyl dithiophosphate wastewater

La Zhu; Zhenkai Yang; Xujie Liu; Qizheng Zhuo; Xiangming Xu; Zhongtian Fu

doi:10.1016/j.envpol.2023.122139

Hydrothermal preparation of NiO/La-NaTaO₃ composite photocatalyst for degradation of ammonium dibutyl dithiophosphate wastewater

Environ Pollut. 2023 Oct 1:334:122139. doi: 10.1016/j.envpol.2023.122139. Epub 2023 Jul 5.

Authors

La Zhu¹, Zhenkai Yang², Xujie Liu³, Qizheng Zhuo⁴, Xiangming Xu⁵, Zhongtian Fu⁶

Affiliations

¹ School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: 2101041@stu.neu.edu.cn.
² School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: 2171084@stu.neu.edu.cn.
³ School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: 2071046@stu.neu.edu.cn.
⁴ School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: 2071055@stu.neu.edu.cn.
⁵ School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: 2171082@stu.neu.edu.cn.
⁶ Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Dept. of Environment Engineering, School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, PR China. Electronic address: fuzhongtian@mail.neu.edu.cn.

PMID: 37419208
DOI: 10.1016/j.envpol.2023.122139

Abstract

The discharge of a large amount of flotation reagents wastewater can cause significant environmental pollution. In this study, NiO/La-NaTaO₃ nano-photocatalyst was prepared and applied to degrade synthetic flotation reagent ammonium dibutyl dithiophosphate wastewater. Various characterization results confirmed the successful synthesis of NiO/La-NaTaO₃, and UV-vis DRS analysis revealed a band gap of 3.96 eV for 4 wt% NiO/2.5% La-NaTaO₃. Under UV light, the degradation rate of 20 mg 4 wt% NiO/2.5% La-NaTaO₃ photocatalyst reached its optimum within 4.5 h at pH=3, exhibiting a 1.45 times improvement compared to pure NaTaO₃. Radical trapping experiments and EPR results showed that ·OH and·O₂^- showed major contribution to the degradation. Furthermore, photocatalytic mechanisms and toxicity evolution were investigated, demonstrating the potential application of photocatalytic methods for treating flotation reagent wastewater.

Keywords: Ammonium dibutyl dithiophosphate; La–NaTaO(3); NiO; Photocatalysis.

MeSH terms

Organothiophosphates*
Ultraviolet Rays
Wastewater*

Substances

Wastewater
dibutyl dithiophosphate
Organothiophosphates