State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China.
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China.
J Hazard Mater. 2022 Mar 5;425:127781. doi: 10.1016/j.jhazmat.2021.127781. Epub 2021 Nov 14.
In this study, the effects of ferric ion (Fe) on the degradation of atrazine (ATZ) in BiMoO/peroxymonosulfate (PMS) system under visible light irradiation was investigated. With the addition of Fe, ATZ in the visible light/BiMoO/PMS system degraded rapidly after 20 min treatment (removal rate > 99%). The enhancement of ATZ removal can be attributed to the role of Fe. As an electron transfer mediator, Fe not only inhibits the recombination of photo-charges and prolongs the life of photogenerated carriers, but also promotes the activation of PMS by accelerating the electron transfer from BiMoO to PMS. The generation of OH and SO in the system was determined via electron paramagnetic resonance (EPR) technology and quenching experiments. Furthermore, the characterization of BiMoO before and after reaction, influence of the reaction parameters (i.e., catalyst and PMS dosages, Fe and ATZ concentration, initial pH), influence of inorganic anions and humic acid, and the recyclability of catalyst in the vis/BiMoO/PMS/Fe system was also investigated. Additionally, the existence of Fe also exhibits a wide selectivity for the degradation of different pollutants and high treatment efficiency. In general, the vis/BiMoO/PMS/Fe system demonstrated the potential as an efficient, economical, and environment-friendly water treatment process.
在这项研究中，研究了可见光辐照下铁离子（Fe）对 BiMoO/过一硫酸盐（PMS）体系中莠去津（ATZ）降解的影响。加入 Fe 后，可见光/BiMoO/PMS 体系中 ATZ 在 20 分钟处理后迅速降解（去除率>99%）。ATZ 去除率的提高归因于 Fe 的作用。作为电子转移介质，Fe 不仅抑制光生载流子的复合并延长光生载流子的寿命，而且通过加速从 BiMoO 到 PMS 的电子转移来促进 PMS 的活化。通过电子顺磁共振（EPR）技术和猝灭实验确定了体系中 OH 和 SO 的生成。此外，还研究了反应前后 BiMoO 的特性、反应参数（即催化剂和 PMS 用量、Fe 和 ATZ 浓度、初始 pH 值）、无机阴离子和腐殖酸的影响以及催化剂在 vis/BiMoO/PMS/Fe 体系中的可回收性。此外，Fe 的存在还表现出对不同污染物降解的广泛选择性和高处理效率。总的来说，vis/BiMoO/PMS/Fe 体系表现出作为一种高效、经济和环保的水处理工艺的潜力。
