Degradation of Nitrophenol in wastewater by sono-activated persulfate/PbO

• Main Authors: Shih, Yu-Cheng, 石育誠
• Other Authors: Chen, Wen-Shing
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/nkd7tn

碩士 === 國立雲林科技大學 === 化學工程與材料工程系 === 105 === Removal of p-Nitrophenol in wastewater performed using sono-activated persulfate/PbO oxidation. 　　Experiments were carried out under batch-wise mode to investigate the influence of various operation variables on the sono-activated behavior, such as ultrasonic power intensity, sono-activated temperature, persulfate concentration, acidity of wastewater and PbO concentration of degradation efficiency and using TOC to investigate. 　　Its organic p-Nitrophenol solution concentration of approximately 100 mg / L. Experiments were added to persulfate and PbO combine with ultrasonic process.However, it is remarkable that p-Nitrophenol pollutants into the reaction time of 6 hours could be nearly thoroughly 31.03% removed under the conditions of persulfate = 3wt%, ultrasonic power = 189 W/cm2, T = 318 K, pH =7.But when add additional PbO concentation=4.480mM and persulfate concentration increase to 5wt%, ultrasonic power = 189 W/cm2, T=318K, pH=7,reaction time of 6 hours that organic pollutants could be removed nearly 91.92%. 　　Because more persulfate can provide more sulfate radicals(SO4-•) and additional PbO can provide more free electrons to degrade organic pollutants by persulfate. 　　Methanol and Ethanol were used as scavengers to clarify the reactive radicals.