Degradation of Reactive Yellow 86 with photo-Fenton process driven by solar light.
Degradation of Reactive Yellow 86 with photo-Fenton process driven by solar light.
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DOI：
10.1016/s1001-0742(09)60275-8
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发表时间：
2010-09
影响因子：
6.9
通讯作者：
H. Katsumata;Syunya Koike;S. Kaneco;Tohru Suzuki;K. Ohta
中科院分区：
文献类型：
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作者：
H. Katsumata;Syunya Koike;S. Kaneco;Tohru Suzuki;K. Ohta
研究了太阳光照下Fenton试剂对活性偶氮染料活性黄86 （RY 86）的脱色效果。pH、h2o2、Fe（II）初始浓度等因素对脱色率影响较大。在最佳条件下，初始浓度为40 mg/L， 20 min后脱色率达90%以上。RY 86在10 ~ 60℃范围内的光敏反应活化能为1.50 kJ/mol。在动力学研究中，RY 86与OH·自由基的反应速率常数可估计为1.7 × 1010L/（mol·sec）。RY 86在太阳光照射下的脱色效率与人工光照射相当。在光- fenton过程中观察到ry86矿化导致TOC的降低。紫外线照射24h后，ry86矿化率约83%。在光催化过程中，最终产物有氯化物、硫酸盐、硝酸盐和铵离子的形成。ry86的分解得到两种中间产物。根据鉴定的中间体，提出了y86的降解机理。
The decolorization of Reactive Yellow 86 (RY 86), one of reactive azo dyes, was investigated in the presence of Fenton reagent under solar light irradiation. The decolorization rate was strongly influenced by pH, initial concentrations of H2O2and Fe(II), and so on. An initial concentration of 40 mg/L was decolored more than 90% after 20 min under optimum conditions. The activation energy of the solar photo-Fenton reaction was 1.50 kJ/mol for RY 86 in the temperature range of 10-60°C. In the kinetic study, the rate constant of RY 86 with OH· radicals could be estimated to be 1.7 × 1010L/(mol·sec). The decolorization efficiency of RY 86 under solar light irradiation was comparable to the artificial light irradiation. The decrease of TOC as a result of mineralization of RY 86 was observed during photo-Fenton process. The rate of RY 86 mineralization was about 83% under UV irradiation after 24 hr. The formation of chloride, sulfate, nitrate and ammonium ions as end-products was observed during the photocatalytic process. The decomposition of RY 86 gave two kinds of intermediate products. The degradation mechanism of RY 86 was proposed on the base of the identified intermediates.