化工学报 ›› 2008, Vol. 59 ›› Issue (6): 1515-1521.

• 能源和环境工程 • 上一篇    下一篇

氧化电位水的稳定性和杀菌机理

任占冬;朱玉婵;张智勇;张奇   

  1. 武汉工业学院化学与环境工程系;武汉大学物理科学与技术学院;武汉丽辉新技术有限公司
  • 出版日期:2008-06-05 发布日期:2008-06-05

Stability and sterilization mechanism of electrolyzed oxidizing water

REN Zhandong; ZHU Yuchan; ZHANG Zhiyong;ZHANG Qi   

  • Online:2008-06-05 Published:2008-06-05

摘要:

考察了保存方式、搅拌和温度对氧化电位水(EOW)稳定性的影响。结果表明,三者对EOW的pH值和氧化还原电位(ORP)影响均不大,但对有效氯值(ACC)影响很大。在敞口见光的保存方式下,有效氯值呈现出有规律的衰减;闭口见光保存时有效氯减少变慢,闭口避光时有效氯保存最为稳定。搅拌(100 r·min-1)会使有效氯减少速率常数k值增加5倍。温度升高对有效氯减少影响很大,当温度为50℃时,5 min内有效氯值下降46.09%,其反应活化能为76.76 kJ·mol-1。另外,通过测试不同有效氯值的EOW杀菌能力,发现有效氯值对EOW杀菌能力影响很大,当有效氯值大于38 mg·L-1时,杀菌效率可达99%;当有效氯值为20.57 mg·L-1时,杀菌效率为92.73%;而当有效氯值为6.82 mg·L-1时,杀菌效率仅为83.30%。所以保持EOW的稳定性有利于EOW的杀菌作用。

关键词:

氧化电位水, 稳定性, 杀菌机理, 保存方式

Abstract:

The influences of temperature, stirring and preservation state on the stability of electrolyzed oxidizing water (EOW) were investigated.Temperature, stirring and preservation state had prominent effect on the available chlorine content(ACC) of EOW, while they had no effect on the value of pH and reductant-oxidant potential (ORP).In open and lighted conditions, ACC decreased regularly.In closed and lighted conditions, ACC decreased slowly.In closed and dark conditions, ACC almost did not change.Stirring (100 r·min-1) makes ACC decrease quickly and the rate constant “k” increased by five times.When temperature was 50℃, ACC decreased by 46.09% in five minutes and the reaction activation energy was 76.76 kJ·mol-1.By studying the sterilizing effect of EOW with different ACC, it was found that ACC also had remarkable influence on the sterilizing effect。When ACC was more than 38 mg·L-1, the ratio of sterilization reached more than 99%; when ACC was 20.57 mg·L-1, the ratio of sterilization was 92.73%; when ACC was 6.82 mg·L-1, the ratio of sterilization was only 83.30%.To improve the sterilizing effect of EOW, the stability of EOW should be enhanced to keep a upper value of ACC.

Key words:

氧化电位水, 稳定性, 杀菌机理, 保存方式