Removal of phenol in wastewater by Ultrasound/persulfate/inorganic electrolyte

• Main Authors: Bo-jie Gu, 辜柏傑
• Other Authors: Wen-shing Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/41086758647620072483

碩士 === 國立雲林科技大學 === 化學工程與材料工程系碩士班 === 101 === The objective ofthis study is to removal of aqueous solution of phenol in wastewater by ultrasound/persulfate/inorganicsonolysis process. The process at variety of inorganic, inorganic concentration, persulfate concentration, sound intensity, solution temperature, pH value to explore the impact of phenol mineral- ization.And using spectrophotometer to detet hydrogen peroxide production. The result show that Manganous sulfate hasremoval of phenolic of five inorganic,due to manganese ion catalyzed persulfate easier to change for the sul- fate radical(SO4–･),it must has an optimum effect at mangnesium sulfate. Increas- ing the inorganic concentration can enchance removal of organic pollutant, because of matel ion catalyzed persulfate and salt-out effect will be upward. Increasing the persulfate concentration , due to manganese ion catalyzed can turn to excessive sulfate ion by adding amount to persulfate ,thus adding it has optimal value at 2.3wt%.Increasing acoustic intensity can enhance removal of organic pollutant, however, it must has an optimum value at 189.42W/cm2. Excessive energy will suppress the effect of removal. At the temperature of solution , persulfae will increase as the temperature enchance the removal, but inorganic will be decrease temperature by great removal organic pollutant, so it has an optimal value at 30℃. To regulate the pH value of phenol solution, the mineralization of phenol is produc- tive for experiment conducted in acidic solutions than those conducted in basic solutions. This is probably because of the predominance of molecular phenols in acidic solution, which are more hydrophobic ionic phenol, and more easiy decomposed by pyrolysis and by hydroxyl radicals. But the mineralization can exchance poor at the extreme system, so it has an optimal value at pH=3. Exploitation spectrophotometer determination of hydrogen peroxide formation experiments with to use deionized water simulate the phenol .According toit can be found to generation of hydrogen peroxide concentrations consistent with the results.So supporting an ultrasound / persulfate / inorganic electrolyte degradation procedure, the removal of phenol in wastewater feasibility.