| γ辐照降解水溶液中氯酚的研究 |
| 摘要点击 3136 全文点击 3003 投稿时间：2007-07-09 修订日期：2007-09-24 |
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| 中文关键词 辐照分解 氯酚 脱氯 动力学 协同效应 |
| 英文关键词 radiolysis chlorophenols dechlorination kinetics synergistic effect |
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| 中文摘要 |
| 研究了水溶液中氯酚(2-氯酚、3-氯酚、4-氯酚、2,4-二氯酚)的γ辐照降解.通过测定辐照前后氯酚、氯离子浓度以及TOC的变化，考察了不同氯酚、不同初始浓度，以及联合O3、H2O2对辐解效果的影响.结果表明，γ辐照可有效降解水溶液中的氯酚，降解过程符合准一级动力学方程；初始浓度为100 mg·L-1，辐照剂量为8 kGy 时, 2-CP、3-CP、4-CP、2,4-DCP的去除率分别为68.0%、97.5%、89.7%和100%，相应的脱氯率分别为60.2%、71.1%、64.3%、78.9%；辐照联合O3或H2O2可有效提高辐照降解氯酚的去除和矿化效率，具有明显“协同效应”. |
| 英文摘要 |
| The radiolytic degradation of chlorophenols (CPs) in aqueous solutions by γ-radiation was studied. The effects of absorbed dose, different type of chlorophenol and their initial concentration on the degradation and dechlorination of CPs were investigated. The experimental results showed that γ-irradiation was able to degrade CPs in aqueous solution successfully, and the radiolytic degradation of CPs was in accordance with the pseudo-first-order kinetic model. When the initial concentration of CPs was 100 mg·L-1 and the radiation dose was 8 kGy, the removal efficiencies of 2-CP, 3-CP, 4-CP, 2,4-DCP were 68.0%, 97.5%, 89.7% and 100% respectively. The corresponding dechlorination efficiencies were 60.2%, 71.1%, 64.3% and 78.9%, respectively. The combination of radiation and O3/H2O2 resulted in a synergistic effect, which remarkably increased the degradation and mineralization efficiency of CPs. |
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