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Photo-catalytic oxidation for pyridine in circumneutral aqueous solution by magnetic Fe-Cu materials activated H2O2
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2020-08-19 , DOI: 10.1016/j.cherd.2020.08.007
Yanhong Wei , Chunrong Wang , Dan Liu , Longxin Jiang , Xiaoya Chen , Haiyan Li , Feilong Zhang

Magnetic Fe-Cu materials were prepared by the sol-gel method and characterized by X-ray Diffraction (XRD), Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy equipped with Energy-Dispersive X-ray spectroscopy (SEM-EDS) and Vibrating Sample Magnetometer (VSM). These materials were applied for the removal of pyridine under the ultraviolet (UV) irradiation in the Fenton-like system. The influences of different parameters, such as the molar ratio of Fe and Cu, catalyst dosages, H2O2 dosages, initial pH value and initial pyridine concentration have been investigated. Analysis of variance (ANOVA) was applied to analyze the impacts of the key factors on the removal efficiency of TOC. The mechanism of the UV/H2O2/M-40% system was explored. The co-doped Fe-Cu catalyst showed high activity, good stability and easy recovery for the degradation of pyridine when the M-40% dosage was 0.90 g L−1, H2O2 dosage was 832.50 mg L−1, initial pH value was 7 and initial pyridine concentration was 100.00 mg L−1. The degradation efficiency of pyridine was more than 99% within 30 min and the removal efficiency of TOC was 97.36 ± 1.10% within 50 min. Therefore, the catalyst M-40% was a potential wastewater treatment material that could widen the action range of pH values, facilitating recycling and reuse.



中文翻译:

磁性Fe-Cu材料活化的H 2 O 2在环境中性水溶液中光催化氧化吡啶

磁性Fe-Cu材料通过溶胶-凝胶法制备,并通过X射线衍射(XRD),Brunauer-Emmett-Teller(BET),配有能量色散X射线光谱仪(SEM-EDS)的扫描电子显微镜进行表征和振动样品磁力计(VSM)。这些材料用于在Fenton样系统中的紫外线(UV)照射下去除吡啶。研究了Fe,Cu摩尔比,催化剂用量,H 2 O 2用量,初始pH值和吡啶起始浓度等不同参数的影响。采用方差分析(ANOVA)分析关键因素对TOC去除效率的影响。UV / H 2 O 2的作用机理探索了/ M-40%的系统。当M-40%用量为0.90 g L -1,H 2 O 2用量为832.50 mg L -1,初始pH值时,共掺杂的Fe-Cu催化剂对吡啶的降解表现出高活性,良好的稳定性和易于回收的特性。值是7,吡啶的初始浓度是100.00 mg L -1。吡啶在30分钟内的降解效率大于99%,TOC在50分钟内的去除效率为97.36±1.10%。因此,催化剂M-40%是潜在的废水处理材料,可以扩大pH值的作用范围,促进回收和再利用。

更新日期:2020-08-19
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