| γ辐照降解水中的盐酸环丙沙星的研究 |
| 摘要点击 2564 全文点击 1504 投稿时间：2014-10-02 修订日期：2014-11-24 |
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| 中文关键词 γ辐照 盐酸环丙沙星 降解 复合污染 ·OH自由基氧化 |
| 英文关键词 γ irradiation ciprofloxacin hydrochloride degradation composite pollution ·OH oxidation |
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| 中文摘要 |
| 本研究重点考察初始浓度、pH值、不同添加剂、复合污染物对盐酸环丙沙星γ辐照降解效果的影响. 结果表明,γ辐照可以有效去除盐酸环丙沙星; 低浓度和强酸性条件有利于盐酸环丙沙星的γ辐照降解; 引入CO32-、甲醇后,盐酸环丙沙星的降解受到抑制,可以推断盐酸环丙沙星降解主要基于 ·OH自由基的氧化和直接受到辐照激发降解. 选择具有致癌性的污染物BrO3-与盐酸环丙沙星混合后辐照,两种污染物的去除率均得到提高,在吸收剂量为400 Gy时,盐酸环丙沙星与BrO3-的去除率分别提高18.74%与1.81%. 100 mg ·L-1盐酸环丙沙星经过6000 Gy γ辐照降解后,TOC与COD的去除率分别为15.22%与61.44%. |
| 英文摘要 |
| Effects of initial concentrations, pH values, different additives and composite pollutants on ciprofloxacin hydrochloride removal using γ irradiation were investigated. The experiments results showed γ irradiation could effectively remove ciprofloxacin hydrochloride; low initial concentration and strongly acidic condition were favorable for CIP removal using γirradiation; the degradation of CIP was inhibited upon the addition of CO32- and methanol, which indicated that the degradation of CIP might be mainly ascribed to ·OH oxidation and the direct decomposition of CIP molecules induced by irradiation. BrO3- showed a synergistic effect with CIP in degradation of the composite pollutants when mixed together with CIP for γ irradiation, and the removal rates of both pollutants were improved. At an absorbed dose of 400 Gy, the removal rates of CIP and BrO3- were increased by 18.74% and 1.81%, respectively. The removal rates of TOC and COD were 15.22% and 61.44%, respectively, when the 100mg ·L-1 CIP was degraded by γ irradiation at the absorbed dose of 6000 Gy. |
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