Oxidative degradation of sulfamethazine in aqueous solution by the activation of Na2S2O8 over vinasse-derived N,S-codoped mesoporous carbon,Water and Environment Journal

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Oxidative degradation of sulfamethazine in aqueous solution by the activation of Na2S2O8 over vinasse-derived N,S-codoped mesoporous carbon
Water and Environment Journal ( IF 1.7 ) Pub Date : 2022-12-14 , DOI: 10.1111/wej.12838
Bo Xing _{1,

2} , Chaoting Fu ₁ , Guo Yang _{1,

2} , Xiang Song ₁ , Xingyong Liu _{1,

2} , Xiaonan Liu ₁ , Qiang Zhou ₁ , Zhongcai Pan ₁ , Junjie You ₁ , Yuling Ye ₁

Affiliation

N,S-codoped mesoporous carbon (S/NMC) as an effective catalyst toward the catalytic persulfate oxidation of sulfamethazine (SMZ) was fabricated conveniently using vinasse as the C/N source, Na₂S as the S precursor and nano-SiO₂ as the template, respectively. The effect of S precursor dosage on the textural properties and surface chemistry of S/NMCs were characterized by N₂ adsorption/desorption, Raman spectra, X-ray diffractometer (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). It was found that more S precursor dosage presented an enhanced SMZ degradation performance due to the significant role of more S precursor dosage: (i) larger specific surface area and (ii) more active surface groups including pyridine N, graphite N, quinone-like O and thiophene-like S. In addition, quenching experiments showed that free radical and nonradical oxidation processes are the main processes of SMZ degradation. The findings provided a new idea for the resource utilization of vinasse and the development of catalytic persulfate oxidation of organic pollution.

中文翻译：

Na2S2O8 在酒糟衍生的 N,S 共掺杂介孔碳上的活化对磺胺二甲嘧啶在水溶液中的氧化降解

_{【摘要】：以酒糟为C/N源,Na 2} S为S前驱体,纳米SiO ₂制备了N,S共掺杂介孔碳(S/NMC)作为催化磺胺二甲嘧啶(SMZ)过硫酸盐氧化的有效催化剂。分别作为模板。S 前体剂量对 S/NMC 的结构特性和表面化学的影响通过 N _2表征吸附/脱附、拉曼光谱、X 射线衍射仪 (XRD)、透射电子显微镜 (TEM)、傅里叶变换红外光谱 (FT-IR) 和 X 射线光电子能谱 (XPS)。结果发现，由于更多 S 前体剂量的显着作用，更多 S 前体剂量呈现出增强的 SMZ 降解性能：(i) 更大的比表面积和 (ii) 更活跃的表面基团，包括吡啶 N、石墨 N、类醌O和类噻吩S。此外，淬灭实验表明自由基和非自由基氧化过程是SMZ降解的主要过程。研究结果为酒糟资源化利用和开发过硫酸盐催化氧化有机污染提供了新思路。

更新日期：2022-12-14

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