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Ultrasonic Degradation of aqueous Phenolsulfonphthalein (PSP) in the presence of nano-Fe/H2O2
Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2018-04-24 , DOI: 10.1016/j.ultsonch.2018.04.012
Olushola S. Ayanda , Simphiwe M. Nelana , Eliazer B. Naidoo

In this study, nano iron (nano-Fe) was successfully synthesized by sodium borohydride reduction of ferric chloride solution to enhance the ultrasonic degradation of phenolsulfonphthalein (PSP). The nano-Fe was characterized by scanning electron microscopy - energy dispersive spectroscopy (SEM-EDX), transmission electron microscopy (TEM), powder x-ray diffraction (XRD), attenuated total reflection - Fourier transform infrared spectroscopy (ATR-FTIR), and Brunauer, Emmett and Teller (BET) surface area determination. Experimental results demonstrated that a combined ultrasonic/nano-Fe/H2O2 system was more effective for PSP removal in combination than they were individually and there was a significant difference between the combined and single processes. The ultrasonic/nano-Fe/H2O2 degradation follows the Langmuir–Hinshelwood (L–H) kinetic model. The addition of nano-Fe and H2O2 to the ultrasonic reactor greatly accelerated the degradation of PSP (25 mg/L) from 12.5% up to 96.5%. These findings indicated that ultrasonic degradation in the presence of nano-Fe and H2O2 is a promising and efficient technique for the elimination of emerging micropollutants from aqueous solution.



中文翻译:

纳米Fe / H 2 O 2存在下超声降解苯酚磺酞(PSP)水溶液

在这项研究中,成功​​地通过硼氢化钠还原氯化铁溶液来增强酚磺酞(PSP)的超声降解,成功地合成了纳米铁(nano-Fe)。通过扫描电子显微镜-能量分散光谱(SEM-EDX),透射电子显微镜(TEM),粉末X射线衍射(XRD),衰减全反射-傅立叶变换红外光谱(ATR-FTIR),以及Brunauer,Emmett和Teller(BET)表面积的确定。实验结果表明,超声/纳米Fe / H 2 O 2组合系统比单独使用更能有效地去除PSP,并且组合和单一工艺之间存在显着差异。超声波/纳米铁/ H2 O 2降解遵循Langmuir-Hinshelwood(L-H)动力学模型。向超声反应器中添加纳米Fe和H 2 O 2大大加快了PSP(25 mg / L)的降解,从12.5%到96.5%。这些发现表明在纳米Fe和H 2 O 2存在下超声降解是从水溶液中消除新兴的微污染物的有前途和有效的技术。

更新日期:2018-04-25
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