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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Kinetics of the MnO_4~- Oxidation of Anionic Surfactant (Sodiumdodecyl Sulphate): Evidence for the Formation of Soluble Colloidal MnO_2
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Kinetics of the MnO_4~- Oxidation of Anionic Surfactant (Sodiumdodecyl Sulphate): Evidence for the Formation of Soluble Colloidal MnO_2

机译：阴离子表面活性剂（十二烷基硫酸钠）的MnO_4〜-氧化动力学：形成可溶性胶体MnO_2的证据

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A conventional spectrophotometric technique was used to study the oxidation of SDS by permanganate in a perchloric acid medium.It was observed that the reaction proceeded in two stages (fast first stage followed by a relatively slow second stage).Plots of log(absorbance) versus time deviate from linearity.The kinetic and spectroscopic data are consistent with the formation of soluble colloidal MnO_2.The first-order kinetics with respect to [SDS] at low concentrations shifted to second-order at higher concentrations.The kinetics of oxidation is first-order with respect to both [MnO_4~-] and [HC1O_4].The oxidation rate was decreased by the addition of P_2O_7~(4-) and Mn(II) ions.Second-step oxidation is not a true path for the oxidation of the Mn(IV)-SDS reaction.In the presence of Mn(II) (a reaction product),the MnO_4~- oxidation of SDS becomes more complicated,and an exact dependence on [Mn(II)] can not be estimated.Different activation parameters have been evaluated.Mechanisms consistent with the kinetic data have been proposed and discussed.The -O-SO_3~- group is responsible for the oxidative degradation of SDS by MnO_4~-.
机译：用传统的分光光度法研究高锰酸在高氯酸介质中对SDS的氧化作用，观察到该反应分两个阶段进行（第一阶段快速，随后第二阶段相对缓慢）。动力学和光谱数据与可溶性胶体MnO_2的形成是一致的。低浓度[SDS]的一级动力学转变为高浓度的第二级。相对于[MnO_4〜-]和[HC1O_4]的顺序。通过添加P_2O_7〜（4-）和Mn（II）离子降低了氧化速率。在反应产物Mn（II）的存在下，SDS的MnO_4〜-氧化变得更加复杂，无法准确地估计对[Mn（II）]的依赖性。评估了不同的激活参数。提出并讨论了动力学数据。-O-SO_3〜-负责MnO_4〜-对SDS的氧化降解。

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