| 臭氧降解高浓度腐殖酸动力学 |
| 摘要点击 3096 全文点击 1709 修订日期：2011-05-31 |
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| 中文关键词 臭氧 腐殖酸 动力学 氧化 羟基自由基 |
| 英文关键词 ozone humic substances kinetics oxidation hydroxyl radical |
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| 中文摘要 |
| 采用臭氧氧化法降解高浓度腐殖酸废水,并研究了臭氧对腐殖酸的降解动力学,考察了臭氧投量、初始腐殖酸浓度、初始pH和反应温度对臭氧降解高浓度腐殖酸废水的影响.结果表明, 在臭氧投量为3.46 g·h-1,初始腐殖酸浓度为1000mg·L-1,初始pH=8.0,反应温度为303 K,反应30 min的条件下,腐殖酸的去除率达到89.04%.在臭氧投量为1.52~6.01 g·h-1,初始腐殖酸浓度为250~1000 mg·L-1,初始pH为2.0~10.0,反应温度在283~323 K的范围内,臭氧降解腐殖酸符合拟一级动力学模型,通过对实验数据拟合,得到反应动力学方程,反应活化能较低(Ea=1.30×104 J·mol-1),并且模型计算数值与实际数据吻合良好(平均相对误差为7.62%). |
| 英文摘要 |
| Humic substance oxidation(HS) degradation by ozone was kinetically investigated. The effects of O3 dosage, initial pH, temperature and initial concentration of HS were studied. Under the conditions of 3.46 g·h-1 ozone dosage, 1000 mg·L-1 initial HS, 8.0 initial pH and 303 K temperature, the removal efficiencies of HS achieved 89.04% at 30 min. The empirical kinetic equation of ozonation degradation for landfill leachate under the conditions of 1.52 -6.10 g·h-1 ozone dosage, 250-1000 mg·L-1 initial HS, 2.0-10.0 initial pH,283-323 K temperature fitted well with the experimental data (average relative error is 7.62%), with low activation energy Ea=1.43×104 J·mol-1. |
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