Chlorination of bisphenol A:: kinetics and by-products formation
Chlorination of bisphenol A:: kinetics and by-products formation
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DOI：
10.1016/j.chemosphere.2004.03.001
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发表时间：
2004-08-01
期刊：
影响因子：
8.8
通讯作者：
Croué, JP
中科院分区：
文献类型：
--
作者：
Gallard, H;Leclercq, A;Croué, JP
在室温（20 +/- 2 摄氏度）下，研究了 pH 2 至 11 之间双酚 A (BPA) 初始氯化的动力学。考虑到 HOCl 与 BPA 物质的基元反应和酸催化反应，对 BPA 与氯反应的表观二阶速率常数的 pH 曲线进行了建模。接近中性 pH 条件下的主要反应是 HOCl 与 BPA 的两种酚盐物质的反应（BPA(-) 的 k = 3.10 x 10(4) M-1 s(-1) 和 BPA(2-) 的 6.62 x 10(4) M-1 s(-1)）。在接近中性pH值时，氯残留量高于0.2 mg l(-1)时，BPA的半衰期经计算小于1.5小时。添加 BPA 的合成处理水的氯化表明，当使用低氯剂量（0.5-1 mg l(-1)）时，BPA 在 4 It 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，必须保持高氯残留量，从而快速产生和分解氯化双酚 A 同系物。 (C) 2004 Elsevier Ltd. 保留所有权利。
The kinetics of initial chlorination of bisphenol A (BPA) was studied between pH 2 and 11 at room temperature (20 +/- 2 degreesC). 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 It 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. (C) 2004 Elsevier Ltd. All rights reserved.