| 高铁酸钾处理水中十六烷基三甲基溴化铵 |
| 摘要点击 2028 全文点击 1127 投稿时间：2008-08-26 修订日期：2008-11-15 |
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| 中文关键词 高铁酸钾 十六烷基三甲基溴化铵 降解 二级反应动力学 |
| 英文关键词 potassium ferrate cetyltrimethyl ammonium bromide(CTAB) degradation second order kinetics |
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| 中文摘要 |
| 室温条件下采用新型氧化剂高铁酸钾(K2FeO4)处理十六烷基三甲基溴化铵(CTAB)模拟废水, 探讨反应时间、K2FeO4投加量及体系pH值等因素对CTAB去除率的影响. 结果表明, 反应时间、K2FeO4投加量及溶液pH值对CTAB的去除率均有不同程度的影响, 当反应时间为30 min、K2FeO4投加量与处理液中CTAB质量比为1∶1、溶液pH为7时, K2FeO4对表面活性剂CTAB的去除率达79.4%. 在反应过程中, K2FeO4的强氧化性与其还原产物的絮凝作用产生协同效应, 其中K2FeO4在完全反应之前CTAB的去除主要依靠K2FeO4的强氧化作用, K2FeO4反应完全之后CTAB的去除则主要依靠K2FeO4还原产物的絮凝作用. 同时进一步研究了CTAB被处理前后的红外光谱特征, 结果表明CTAB在降解过程中经历了链的断裂并进一步被矿化为无机小分子. 化学反应动力学研究结果表明K2FeO4与CTAB的反应符合二级反应动力学规律. |
| 英文摘要 |
| A novel oxidant potassium ferrate (K2FeO4) was used to remove cetyltrimethyl ammonium bromide (CTAB) at room temperature. The effects of various conditions on the removal ratio, such as reaction time, dosing quantity of K2FeO4 and initial pH, were investigated. The experiments results show that the removal ratio reaches 79.4% when the reaction time is 30 min, the dosing quantity of K2FeO4 to CTAB is 1∶1, the initial pH of the solution is 7. In the reaction progress, the oxidation of K2FeO4 and the flocculation of the reduction product have synergistic effect on the removal of CTAB. In addition, infrared spectra of CTAB before and after being treated with K2FeO4 were further studied. The results indicate that the degradation process involves the interruption of chain and the subsequent mineralization to inorganic molecules. Furthermore, the reaction of K2FeO4 and CTAB follows second order kinetics law. |
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