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

文献类型： 外文期刊

第一作者： Zeng, Chenyu

作者： Zeng, Chenyu;Ma, Yongfei;Chen, Xi;Zeng, Chenyu;Ma, Yongfei;Deng, Zhikang;Mu, Rui;Zhang, Zulin;Li, Ping;Qi, Xuebin;Liu, Hongtao;Zhang, Zulin

作者机构：

关键词： Radicals; Non-radicals; Detoxification; Density functional theory; Degradation pathways

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.7； 五年影响因子：9.4 ）

ISSN： 0960-8524

年卷期： 2024 年 407 卷

页码：

收录情况： SCI

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.

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