A novel 3-dimensional graphene-based cobalt-manganese bimetallic layered double hydroxide:Formation mechanism and performance in photo-assisted permonosulfate-activated degradation of sulfamethoxazole in aqueous solution

被引：7

作者：

Liu, Zhibo

Duan, Xiaoyue ^{[1
,2
]}

Sarmah, Ajit K. ^{[3
]}

Zhao, Xuesong ^{[1
,2
]}

Ren, Xin ^{[1
,2
]}

Sun, Bo ^{[4
]}

机构：

[1] Jilin Normal Univ, Coll Environm Sci & Engn, Haifeng St, Tiexi Dist 136000, Siping, Peoples R China

[2] Educ Dept Jilin Prov, Key Lab Environm Mat & Pollut Control, Siping 136000, Peoples R China

[3] Univ Auckland, Fac Engn, Dept Civil & Environm Engn, Private Bag 92019, Auckland 1142, New Zealand

[4] Wenzhou Univ, Natl & Local Joint Engn Res Ctr Ecol Treatment Tec, Sch Life & Environm Sci, Wenzhou, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2023年 / 336卷

基金：

中国国家自然科学基金;

关键词：

Permonosulfate; Visible light; Bimetallic layered double hydroxide; Sulfamethoxazole; Reaction mechanism; PEROXYMONOSULFATE; ANTIBIOTICS; NANOSHEETS; EFFICIENT; HYDROGEL; REMOVAL;

D O I：

10.1016/j.envpol.2023.122397

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sulfamethoxazole (SMX) is a common antibiotic used mainly for bacterial treatment. In this study, a novel threedimensional cobalt-manganese bimetallic layered double hydroxide graphene hydrogel (CoMn-LDHs/rGO) has been prepared for photo-assisted permonosulfate (PMS)-activated degradation of SMX in water. Compared with the CoMn-LDHs/rGO + PMS and CoMn-LDHs/rGO + Vis systems, the degradation effect of CoMn-LDHs/rGO + PMS + Vis system is the best, and the degradation effect of CoMn-LDHs/rGO system could reach more than 98% under the optimal conditions. After 10 cycles, the catalytic degradation performance of CoMn-LDHs/rGO system remained good, while effectively preventing the leaching of metal ions. Based on the synergistic effect of photocatalysis and PMS oxidation, electron spin resonance spectroscopy and quenching experiments showed that three active substances (& BULL;OH, & BULL;SO4  and O2 & BULL; ) were involved in the degradation of SMX. Density functional theory and liquid chromatography-mass spectrometry (LC-MS) results further proposed the SMX degradation transformation calculation. As expected, the study of the reaction mechanism of 3D CoMn-LDHs/rGO assisted PMS activation under visible light provides an efficient and rapid method for the sustainable degradation of pollutants in water system.

引用

页数：14