Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China.
College of Chemistry, Jilin University, Changchun 130012, China.
J Environ Sci (China). 2021 Aug;106:147-160. doi: 10.1016/j.jes.2021.01.024. Epub 2021 Feb 1.
The extensive use of tetracycline hydrochloride (TCH) poses a threat to human health and the aquatic environment. Here, magnetic p-n BiWO/CuFeO catalyst was fabricated to efficiently remove TCH. The obtained BiWO/CuFeO exhibited 92.1% TCH degradation efficiency and 50.7% and 35.1% mineralization performance for TCH and raw secondary effluent from a wastewater treatment plant in a photo-Fenton-like system, respectively. The remarkable performance was attributed to the fact that photogenerated electrons accelerated the Fe(III)/Fe(II) and Cu(II)/Cu(I) conversion for the Fenton-like reaction between Fe(II)/Cu(I) and HO, thereby generating abundant •OH for pollutant oxidation. Various environmental factors including HO concentration, initial pH, catalyst dosage, TCH concentration and inorganic ions were explored. The reactive oxidation species (ROS) quenching results and electron spin resonance (ESR) spectra confirmed that •O and •OH were responsible for the dark and photo-Fenton-like systems, respectively. The degradation mechanisms and pathways of TCH were proposed, and the toxicity of products was evaluated. This work contributes a highly efficient and environmentally friendly catalyst and provides a clear mechanistic explanation for the removal of antibiotic pollutants in environmental remediation.
盐酸四环素（TCH）的广泛使用对人类健康和水生环境构成了威胁。在这里，制备了磁性 p-n BiWO/CuFeO 催化剂以有效去除 TCH。在类芬顿光催化体系中，所获得的 BiWO/CuFeO 对 TCH 的降解效率为 92.1%，对来自污水处理厂的原始二级出水的矿化率分别为 50.7%和 35.1%。显著的性能归因于光生电子加速了 Fe(III)/Fe(II)和 Cu(II)/Cu(I)之间的转化，从而促进了 Fenton 反应中 Fe(II)/Cu(I)和 HO 之间的类似反应，从而产生了丰富的用于污染物氧化的•OH。探讨了各种环境因素，包括 HO 浓度、初始 pH 值、催化剂用量、TCH 浓度和无机离子。反应性氧化物种（ROS）猝灭结果和电子自旋共振（ESR）谱证实，•O 和•OH 分别负责暗和类芬顿体系。提出了 TCH 的降解机制和途径，并评估了产物的毒性。这项工作提供了一种高效且环保的催化剂，并为环境修复中抗生素污染物的去除提供了明确的机理解释。
