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研究二氧化氯消毒剂活化条件对二氧化氯含量的影响因素,探索最佳活化条件,采用五步碘量法与悬液定量杀灭试验进行了实验室研究。结果,在20℃条件下,将亚氯酸钠(A剂)与柠檬酸(B剂)各取1.0 g溶解于5 m l水中,活化30 m in,生成二氧化氯含量为质量分数7.454%,二氧化氯活化率为82.10%;溶解于100 m l水中,活化30 m in,生成二氧化氯含量仅为0.238%,二氧化氯活化率仅2.62%。将A剂与B剂各取1.0 g溶解于5m l水中,活化10 m in,生成二氧化氯含量为质量分数3.64%;活化240 m in,生成二氧化氯含量达到9.079%,二氧化氯活化率达到100%;活化时间继续延长,生成二氧化氯含量则逐步下降,二氧化氯开始分解。以含二氧化氯149 mg/L,浸泡作用15 m in,对悬液内枯草杆菌黑色变种芽孢杀灭对数值>5.0。结论,亚氯酸钠以柠檬酸为活化剂,在20℃条件下,二氧化氯的生成量随活化水量增多而降低,随活化时间的延长而增高,活化时间超过4 h生成含量下降。该二氧化氯消毒剂对枯草杆菌黑色变种芽孢杀灭效果较好。
To study the influencing factors of chlorine dioxide disinfectant activation conditions on chlorine dioxide content, to explore the optimal activation conditions, using five-step iodine method and suspension quantitative kill test laboratory research. As a result, 1.0 g of each of sodium chlorite (agent A) and citric acid (agent B) was dissolved in 5 ml of water at 20 ° C for 30 min to generate a chlorine dioxide content of 7.454% by mass, The activation rate of chlorine dioxide is 82.10%. When it is dissolved in 100 ml of water and activated for 30 minutes, the content of chlorine dioxide is only 0.238% and the rate of chlorine dioxide is only 2.62%. 1.0 g of A and B solutions were dissolved in 5 ml of water and activated for 10 minutes. The content of chlorine dioxide reached 3.64% by mass. After activation for 240 minutes, the content of chlorine dioxide reached 9.079%. Chlorine dioxide was activated Rate reached 100%; activation time continued to extend the generation of chlorine dioxide is gradually decreased, chlorine dioxide began to decompose. The logarithmic value of killing Bacillus subtilis var. Subtilis in the suspension was> 5.0 with 149 mg / L chlorine dioxide and 15 minutes immersion. The results showed that when sodium citrate was activated with citric acid, the amount of chlorine dioxide decreased with the increase of the amount of activated water at 20 ℃, and increased with the prolongation of activation time. The chlorine dioxide disinfectant Bacillus subtilis black variant spores kill better.