A novel Fe-rectorite composite catalyst synergetic photoinduced peroxymonosulfate activation for efficient degradation of antibiotics. (February 2022)

• Record Type: Journal Article
• Authors: Wang, Jinpeng; Yao, Jia; Zhu, Liangliang; Gao, Caiyan; Liu, Jingxuan; She, Sijia; Wu, Xiaoyong
• Is Part Of: Chemosphere. Volume 289(2022)
• Publication Date: 2022-02
• Subjects: Peroxymonosulfate activation -- Synergetic -- Fe-rectorite -- Photocatalysis -- Tetracycline; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.133211
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Developing a low-cost and efficient photocatalysts activated peroxymonosulfate (PMS) for organic pollutants degradation are recognized as an importance way for dealing with environmental pollution. In this work, Fe-rectorite catalyst was synthesized by a simple impregnation-calcine method to synergetic photo activate PMS for antibiotics degradation. As expected, the Fe-rectorite/PMS/Light system exhibits superior catalytic performance for tetracycline (TC) removal, which achieving 96.4% removal rate of TC (30 mg/L) under light within 60 min. Fe-retorite has better degradation performance for TC than rectorite under photo-mediation. The enhancement of the degradation performance of TC by Fe-retorite can be attributed to the improvement of the separation efficiency of photogenerated electrons and holes in the rectorite by the loading of Fe2 O3, and the accelerated active Fe(Ⅱ)/Fe(Ⅲ) cycle on the surface under photo-mediation. The large specific surface area and abundant hydroxyl groups of rectorite can also provide active sites for PMS activation. The quenching experiment and electron paramagnetic resonance (EPR) test were indicated that the h +, SO4 -, OH, and O2 − all contributed to TC degradation. And the possible degradation pathway was proposed by LC-MS. This work helps induced a novel direction that design green, efficient, and recyclable heterogeneous catalysts to synergetic photoinduced PMS activation for enhanced degradation of TC. Graphical abstract: Image 1 Highlights: The removal rate of TC by Fe-retorite activated PMS under photo-mediated can reach 96.4% within 60 min. The Fe-Rectorite/PMS/Light system has strong ion resistance and wide pH tolerance. The Fe-retorite still maintains a high degradation efficiency for TC after multiple activation of PMS. The Fe(Ⅱ)/Fe(Ⅲ) cycle and the –OH group provide the main contribution to the degradation of TC.