基于炉渣纳米复合材料固定化的新型太阳能模拟光催化制药废水异分解:响应面法优化

IF 1.6 Q3 WATER RESOURCES
Kingsley Safo, Hussien Noby, Masatoshi Mitsuhara, Hiroshi Naragino, Ahmed H. El-Shazly
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引用次数: 0

摘要

摘要本研究采用溶剂热法将炼钢炉渣转化为富fe2o3纳米复合材料,在固定化模式下光降解制药废水。采用XRF、SEM、EDX、TEM、FTIR、XRD和UV-Vis光谱仪对纳米复合材料进行了表征。XRF分析结果表明,Fe2O3和SiO2的重量百分比显著增加,而CaO的含量则显著降低。SEM图像显示了纳米复合材料在形状和结构上的球形和非均质性质,而FTIR证实了Si-O-Si和Fe-O的振动带增加,而Ca-O的宽拉伸模式减少。XRD结果表明,Fe2O3的晶峰尺寸为15.17 nm。采用炉渣纳米复合材料对扑热息痛进行光降解。采用响应面法在R2值为0.99,p值为<0.05. 在最优值下得到的降解效率为96.96%。第5次循环时,固定化纳米复合材料的降解效率为77.89%。降解机理表明,OH•自由基是降解过程中的主要物质。研究表明,矿渣纳米复合材料可有效地用于制药废水的处理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Novel solar simulated photocatalytic heterolysis of pharmaceutical wastewater via slag nanocomposite immobilization: optimization using response surface methodology
Abstract This study converted slag from the steelmaking industry into an Fe2O3-rich nanocomposite using solvothermal technique for photodegradation of pharmaceutical wastewater in an immobilized mode. The nanocomposite was characterized using XRF, SEM, EDX, TEM, FTIR, XRD, and UV–Vis spectrometer. The XRF analysis result reveals a significant increase in the weight percent of Fe2O3 and SiO2, with a decrease in CaO content. The SEM images revealed the spherical and heterogeneous nature of the nanocomposite in shape and structure, while the FTIR confirms the increase in the vibration band of Si–O–Si and Fe–O with a reduction in the wide stretch mode of Ca–O. The XRD result illustrated the crystalline peak of Fe2O3 with a nanoparticle crystal size of 15.17 nm. The slag nanocomposite was used for the photodegradation of paracetamol. The optimum operating parameters were obtained using response surface methodology at an R2 value of 0.99 and p-value &lt; 0.05. The degradation efficiency obtained at the optimum value was 96.96%. The degradation efficiency of the fifth repeated cycle of the immobilized nanocomposite was 77.89%. The degradation mechanism revealed that OH• radical was the major species of the degradation process. This work showed that slag nanocomposite might be effectively used for pharmaceutical wastewater treatment.
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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