| γ-射线辐照-H2O2联合技术降解3-氯酚的研究 |
| 摘要点击 3201 全文点击 1450 投稿时间：2008-10-27 修订日期：2009-01-20 |
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| 中文关键词 3-氯酚 优先污染物 γ-辐射 辐射降解 协同效应 |
| 英文关键词 3-chlorophenol priority pollutant γ-radiation radiolysis synergic effect |
| DOI 10.13227/j.hjkx.20091020 |
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| 中文摘要 |
| 利用60Ｃo γ-射线辐照3-氯酚(3-CP)水溶液，研究了其辐射降解特性.通过测量辐射后3-氯酚的去除率、紫外-可见光谱、脱氯率、总有机碳（TOC）去除率等，探讨了吸收剂量、氯酚初始浓度、H2O2加入对氯酚降解效果的影响，并初步探讨了氯酚降解动力学特性.结果表明，当3-氯酚浓度为10 mg·L-1，辐射剂量为2 kGy时，脱氯率可达 100%，TOC去除率达53%；当辐射剂量提高到8 kGy时，3-氯酚可完全矿化，TOC去除率达100%.3-氯酚的辐照降解过程可用一级反应动力学方程拟合.氯酚单独γ-辐射以及辐照/H2O2联合处理的一级反应动力学常数k分别为0.279 h-1和0.542 h-1. |
| 英文摘要 |
| The radiolytical degradation of 3-chlorophenol (3-CP) in aqueous solution was investigated using γ-radiation and γ-radiation/ hydrogen peroxide (H2O2) combined process. The effect of absorbed dose, initial concentration of 3-CP and addition of H2O2on pollutant degradation, dechlorination and the degree of mineralization was studied by measuring the removal efficiency of 3-CP, the variation of total organic carbon (TOC), the dechlorination rate, and the absorbance spectrum of vis-UV. The kinetics of 3-CP degradation was also discussed. The results showed that when 3-CP concentration was 10 mg·L-1 and the absorbed dose was 2 kGy, the dechlorination rate reached 100%, the TOC removal efficiency was 53%; when the absorbed dose increased to 8 kGy, 3-CP could be completely mineralized and the TOC removal efficiency reached 100%. The radiolysis of 3-CP could be described by one-order reaction kinetics, there existed synergic effect for combined process of γ-irradiation/hydrogen peroxide for 3-CP degradation. The rate constant of 3-CP degradation for γ-radiation and γ-radiation/hydrogen peroxide combined process was 0.279 h-1 and 0.542 h-1, respectively. |
