Kinetics of the Ozidative Reaction of Phenol and Chlorinated Phenols Employing Fenton Reagent
The objectives of the present work have been to estimate hydroxyl radical reaction rate constant based on a proposed reaction mechanism for the degradation of phenol, o- chlorophenol and p-chlorophenol. The view behind it is to verify the rate equations developed for degradation of these compounds on the basis of reaction pathways. We observed that the Fenton reaction, an advanced treatment technology for removal of hazardous and refractory organic compounds, could effectively be employed to degrade phenol and chlorophenols. Initial substrate concentration as well as hydrogen peroxide and ferrous ion concentrations in aqueous solution has significant effect on effective and efficient degradation of contaminants. For a particular concentration of initial substrate in solution there should be an optimum level of ferrous ion concentration in reaction medium. Based on the experimental observations a probable mechanism for the Fenton degradation kinetics has been proposed and a rate equation developed in our earlier study. From these new data sets and the rate expression developed, OH?radical reaction rate constant for the degradation of three compounds viz. phenol, o- and p-chlorophenols in Fenton reaction were calculated and the values were 2.445?07 m3 mol-1 s-1, 2.208?07 and 2.233?07 m3 mol-1 s-1 respectively for phenol, o- and p-chlorophenols. Calculated values show good agreement with our earlier study.
fenton hydrogen perozide hydrozyl radical rate constants
Asim K DE Sekhar BHATTACHARJEE
Department of Chemical Engineering,University of Calcutta,92,Acharyya P. C. Road,Kolkata 700 0009,INDIA
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
410-416
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）