Kinetics and Mass Transfer of Atrazine Ozonation
The kinetics of atrazine oxidation in aqueous solution by ozone was studied under different initial pH conditions and in the presence of a hydroxyl radical scavenger at pH 2.8. It was verified that the process took place mainly through radical reaction, even in acid medium. Therefore, a relatively high value of 26.4 L/(mol.s) for the rate constant of the direct reaction between molecular ozone and atrazine was found. After 10 minutes of oxidation, the degradation of the herbicide was more effective for pH 10.30 than for pHs 6.25 and 2.80. The mass transfer of ozone from the gas phase to the liquid phase was strongly affected by the oxygen flowrate and to a lesser extent by the stirring speed.
SILVA Rafaela Cristina Landeiro da CARVALHO Roberto Jos(e) de CALFA Bruno Abreu
Department of Materials Engineering, Pontifical Catholic University of Rio de Janeiro,Rua Marquês de S(a)o Vicente, 225, Rio de Janeiro, RJ, 22453-900, Brazil
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
531-539
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）