The reaction between hypochlorous acid and chlorite ions is the rate limiting step for in situ chlorine dioxide regeneration. The possibility of increasing the speed of this reaction was analyzed by the addition of tertiary amine catalysts in the system at pH 5. Two amines were tested, DABCO (1,4-diazabicyclo[2.2.2]octane) and its derivative CEM-DABCO (1-carboethoxymethyl-1-azonia-4-aza-bicyclo[2.2.2]octane chloride). The stability of the catalysts in the presence of both reagents and chlorine dioxide was measured, with CEM-DABCO showing to be highly stable with the mentioned chlorine species, whereas DABCO was rapidly degraded by chlorine dioxide. Hence, CEM-DABCO was chosen as a suitable candidate to catalyze the reaction of hypochlorous acid with chlorite ions and it significantly increased the speed of this reaction even at low catalyst dosages. This research opens the door to a faster regeneration of chlorine dioxide and an improved efficiency in chlorine dioxide treatments.

中文翻译：

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叔胺催化次氯酸和亚氯酸根离子生成二氧化氯

次氯酸和亚氯酸根离子之间的反应是原位二氧化氯再生的限速步骤。通过在 pH 5 的系统中添加叔胺催化剂来分析提高该反应速度的可能性。测试了两种胺，DABCO（1,4-二氮杂双环 [2.2.2] 辛烷）及其衍生物 CEM-DABCO (1-carboethoxymethyl-1-azonia-4-aza-bicyclo[2.2.2] 辛烷氯化物)。测量了在试剂和二氧化氯存在下催化剂的稳定性，CEM-DABCO 显示出对提到的氯物质高度稳定，而 DABCO 被二氧化氯迅速降解。因此，CEM-DABCO 被选为合适的候选物来催化次氯酸与亚氯酸根离子的反应，即使在低催化剂剂量下，它也能显着提高该反应的速度。这项研究为更快地再生二氧化氯和提高二氧化氯处理效率打开了大门。