| Fe(Ⅱ)强化声化学降解偶氮染料酸性红B的研究 |
| 摘要点击 1503 全文点击 1281 投稿时间：2003-08-26 修订日期：2003-10-17 |
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| 中文关键词 Fe(Ⅱ) 声化学 H2O2 偶氮染料 |
| 英文关键词 Fe(Ⅱ) sonochemistry H2O2 azo dye |
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| 中文摘要 |
| 采用50kHz超声降解偶氮染料酸性红B(ARB),考察了溶液pH和Fe(Ⅱ)浓度对ARB声化学降解过程的影响.结果表明,酸性条件有利于ARB的脱色过程.超声过程中H2O2的浓度随时间线性增加.Fe(Ⅱ)和H2O2反应生成·OH,强化了ARB的声化学脱色速率和降解过程.当Fe(Ⅱ)浓度为1.43 mg/L和2.85 mg/L时,ARB的脱色速率(在515 nm处)分别提高了1.17倍和1.75倍.同时,ARB在322 nm和254 nm处的紫外吸收亦明显下降.
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| 英文摘要 |
| Sonochemical degradation of azo dye Acid Red B (ARB) was studied in this paper. The effect of pH and ferrous ion concentrations on the process was investigated. The results show that decolorization of ARB proceeds faster in acidic medium. The production of H2O2 is proportional to sonication time. The presence of Fe(Ⅱ), which could react with H2O2 to produce ·OH, enhances the sonochemical decolorizatio and degradation of the dye. The decolorization rates of ARB are 2.17 and 2.75 times faster, respectively, when Fe(Ⅱ) concentrations are 1.43 mg/L and 2.85 mg/L. The UV absorptions at 322 nm and 254 nm also reduce ARB dramatically. |
