二氧化氯复合消毒剂的稳定性

STABILITY OF COMPOUND CHLORINE DIOXIDE DISINFECTANT

由二氧化氯协同消毒器产生的二氧化氯复合消毒剂,有效氯含量不稳定。实验证明,将消毒液pH值由2.0调至11.9,在避光下保存,贮存6个月,总有效氯仅下降3.36％,且其对水的消毒作用无明显减弱。

The compound chlorine dioxide disinfectant produced by USA-made chlorine dioxide combined sterilizer contains chlorine dioxide, hydrogen peroxide, chlorine and ozone. The total available chlorine content of the original solution is 4000 mg/ L. In the experiment, it was diluted to 10% solution and stored in milky white polychloroethylene bottles. One group of disinfectant solution retained the original pH (2.0) and other two groups were adjusted to pH 9.6 and 11.9 respectively by addition of sodium hydroxide. When the disinfectant solution was put under direct sunlight, its total available chlorine content decreased rapidly by 45～53% on 15th day and by 97～99% on 74th day. When the disinfectant solution was stored in cabinet away from sunlight, the total available chlorine decreased slowly, especially the pH 11.9 group, in which no change of total available chlorine content occurred after storage for three months and only about 3% decrease was found after six months. No significant difference was observed between efficacy of disinfectant of pH 11.6 group stored for 174 days and freshly prepared non-alkalized disinfectant solution (pH 2.0)in disinfection of sewage.