Efficient degradation of sulfadiazine by UV-triggered electron transfer on oxalic acid-functionalized corn straw biochar for activating peroxyacetic acid: Performance, mechanism, and theoretical calculation

被引：4

作者：

Zeng, Chenyu ^{[1
,2
]}

Ma, Yongfei ^{[1
,2
]}

Li, Ping ^{[3
]}

Chen, Xi ^{[1
]}

Liu, Hongtao ^{[4
]}

Deng, Zhikang ^{[2
]}

Mu, Rui ^{[2
]}

Qi, Xuebin ^{[3
]}

Zhang, Zulin ^{[2
,5
]}

机构：

[1] Xianghu Lab, Hangzhou 311231, Peoples R China

[2] Wuhan Univ Technol, Sch Resources & Environm Engn, Hubei Key Lab Mineral Resources Proc & Environm, Wuhan 430070, Peoples R China

[3] Chinese Acad Agr Sci, Farmland Irrigat Res Inst, China UK Water & Soil Resources Sustainable Utiliz, Xinxiang 453002, Peoples R China

[4] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

[5] James Hutton Inst, Craigiebuckler AB15 8QH, Aberdeen, Scotland

来源：

BIORESOURCE TECHNOLOGY | 2024年 / 407卷

基金：

中国国家自然科学基金;

关键词：

Radicals; Non-radicals; Detoxification; Density functional theory; Degradation pathways; PERACETIC-ACID; KINETICS; ADSORPTION;

D O I：

10.1016/j.biortech.2024.131103

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A novel UV/oxalic acid functionalized corn straw biochar (OCBC)/peroxyacetic acid (PAA) system was built to degrade sulfadiazine from waters. 94.7 % of SDZ was removed within 30 min by UV/OCBC/PAA. The abundant surface functional groups and persistent free radicals (PFRs) on OCBC were responsible for these performances. Cyclic voltammetry (CV) and other characterization analysis revealed, under UV irradiation, the addition of OCBC served as electron donor, which might promote the reaction of electrons with PAA. The quenching and electron paramagnetic resonance (EPR) tests indicated that R-O center dot, 1O2 and center dot OH were generated. Theoretical calculations indicated sulfonamide bridge was vulnerable under the attacks of reactive species. In addition, high removal effect achieved by 5 reuse cycles and different real waters also suggested the sustainability of UV/OCBC/ PAA. Overall, this study provided a feasible approach to remove SDZ with high mineralization efficiency, in addition to a potential strategy for resource utilization of corn straw.

引用

页数：9

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