| 内分泌干扰物4-叔丁基苯酚在水中的氯化动力学研究 |
| 摘要点击 2154 全文点击 1495 投稿时间：2006-08-03 修订日期：2006-09-11 |
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| 中文关键词 4-TBP 氯化 动力学 表观速率常数 消毒 |
| 英文关键词 4-TBP chlorination kinetics apparent kinetic rate disinfection |
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| 中文摘要 |
| 对典型内分泌干扰物4-叔丁基苯酚（4-TBP）在水中的氯化反应动力学进行了研究.结果发现，在不同HOCl初始浓度和pH条件下，4-TBP能够迅速被氯氧化，4-TBP的氯化反应符合二级反应动力学.表观速率常数kapp与pH值有关，在pH为5和9左右时，kapp分别达到最小值和最大值；对氯化反应中的每一个基元反应的反应速率常数进行了计算， HOCl与4-TBP的酸催化反应及ClO-与4-TBP反应的速率常数分别为4.99×106 L2·（mol2·min）-1和1.96×104 L·(mol·min)-1，而HOCl与4-TBP的反应及HOCl与4-TBP-的反应较慢，4-TBP-与ClO-不发生反应.水处理中氯消毒工艺对4-TBP的降解有一定的影响，在氯投加量为3 mg/L时，4-TBP的半衰期为12.1 min. |
| 英文摘要 |
| The kinetics of endocrine disruptor 4-tert-butylphenol by chlorination in aqua was studied. The results showed that 4-TBP was rapidly oxidized by chlorine with different initial concentrations of HOCl and pH, and second-order reaction kinetics was observed between 4-TBP and chlorine. The apparent kinetic rate constants were influenced by pH values, and kapp reached its highest and lowest level at pH 5 and 9 respectively. The kinetic rate constant of every elementary reaction was calculated. The rate constants for the acid-catalyzed reaction and the reaction between ClO- and 4-TBP were 4.99×106 L2·(mol2·min)-1 and 1.96×104 L·(mol·min)-1 respectively. The reaction between HOCl and 4-TBP or HOCl and 4-TBP- was very slow, and ClO- did not react with 4-TBP-. 4-TBP was influenced by chlorine disinfection during water treatment. The corresponding half-life time was 12.1 min when chlorine concentration was 3 mg/L. |
