氯气和二氧化氯的杀菌能力哪个强化学老师要数据,所以

2025-04-07 12:36:59
推荐回答(1个)
回答(1):

ClO2--Cl离子 1molClO2消毒(即去氧化)可得到5mol 电子 Cl2 --Cl离子 1molCl2 消毒 得到2mol电子 1mol消毒物质 ClO2得到电子数是Cl2的2.5倍 在同质量的情况下,二氧化氯的消毒能力是氯气的 2.63倍 【2.5*[(35.5*2)/(35.5+16*2)]=2.63】 二氧化氯不与氨及氨基化合物反应,其杀菌效果不受氨的影响.氯气消毒的一个缺点是氯与氨反应生成氯胺,使氯的杀菌效果大为下降.另外,从理论上讲,水中每mg/l的胺要消耗10 mg/l的氯,只有超过此耗氯量后才能检测到自由余氯.这极大地增加了耗氯量,甚至发生加不上氯的现象.而二氧化氯不与水中的氨和大多数胺等化合物反应,与水中其它有机物的反应也较氯弱,故可减少使用量.这个特点使二氧化氯非常适合于合成氨厂和炼油厂及碱性废水处理. 温度升高,二氧化氯的杀菌能力增强.科学家对常见细菌作了大量的实验,例如对大肠杆菌,加二氧化氯0.25 mg/l,在25°C达到99.9%的杀死效果需190分钟.而在30摄氏度时仅需10S.这对循环水的杀生来讲是很有利的. 而氯气则无此特性.

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