Gallard Hervé, Leclercq Amélie, Croué Jean-Philippe
Laboratoire de Chimie de l'Eau et de l'Environnement, UMR CNRS 6008, Ecole Supérieure d'Ingénieurs de Poitiers 40, Avenue du recteur Pineau, 86 022 Poitiers Cedex, France.
Chemosphere. 2004 Aug;56(5):465-73. doi: 10.1016/j.chemosphere.2004.03.001.
The kinetics of initial chlorination of bisphenol A (BPA) was studied between pH 2 and 11 at room temperature (20 +/- 2 degrees C). pH Profile of the apparent second-order rate constant of the reaction of BPA with chlorine were modeled considering the elementary reactions of HOCl with BPA species and an acid-catalyzed reaction. The predominant reactions at near neutral pH were the reactions of HOCl with the two phenolate species of BPA (k = 3.10 x 10(4) M(-1)s(-1) for BPA- and 6.62 x 10(4) M(-1) s(-1) for BPA(2-)). At near neutral pH, half-life times of BPA were calculated to be less than 1.5 h for chlorine residual higher than 0.2 mg l(-1). Chlorination of synthetic treated waters spiked with BPA showed that BPA disappeared within 4 h and that chlorinated bisphenol A congeners were rapidly formed and remained in solution for up to 10-20 h when low chlorine dosages are applied (0.5-1 mg l(-1)). To limit their presence in drinking water networks, it is then necessary to maintain high chlorine residuals that rapidly produce and decompose chlorinated bisphenol A congeners.
在室温（20±2℃）下，研究了双酚A（BPA）在pH值为2至11之间的初始氯化动力学。考虑到HOCl与BPA物种的基本反应以及酸催化反应，对BPA与氯反应的表观二级速率常数的pH分布进行了建模。在接近中性pH值时，主要反应是HOCl与BPA的两种酚盐物种的反应（对于BPA-，k = 3.10×10⁴ M⁻¹s⁻¹；对于BPA(2-)，k = 6.62×10⁴ M⁻¹s⁻¹）。在接近中性pH值时，对于余氯高于0.2 mg l⁻¹的情况，计算得出BPA的半衰期小于1.5小时。对添加了BPA的合成处理水进行氯化表明，当采用低氯剂量（0.5 - 1 mg l⁻¹）时，BPA在4小时内消失，并且氯化双酚A同系物迅速形成并在溶液中保留长达10 - 20小时。为了限制它们在饮用水网络中的存在，因此有必要保持高余氯水平，以便迅速产生并分解氯化双酚A同系物。
