特征黏度系列化聚二甲基二烯丙基氯化铵的杀菌性能

Bactericidal Performance of PDM with Series Intrinsic Viscosity

配制6个受菌污染的水样,研究了在不同培养基种类、含量和菌含量的影响下,特征黏度(η)系列化聚二甲基二烯丙基氯化铵(PDM)的实际杀菌能力。结果表明,PDM对含0.1%或10%有机、无机培养基的4种微污染水(菌含量1×104～1×105个/mL)与含10%有机、无机培养基的2种重污染水(菌含量1×106～1×107个/mL)的杀菌率先随加药量增加而增大。当加药质量浓度分别达到4、0.03、11、0.10、14、2.8 mg/L时,杀菌率均可接近或超过99%。实验结果发现,有机培养基的含量明显影响PDM杀菌性能,低含量无机培养基对PDM杀菌率的影响最小。由估算得到PDM(η:0.48、1.53、2.52、3.99 dL/g)对不含培养基的微污染水和重污染水杀菌率达99%时,实际用量分别为0.029、0.028、0.027、0.026 mg/L和2.73、2.35、2.33、2.31 mg/L。PDM的特征黏度越大,杀菌性能越佳。

Six water samples contaminated by bacteria were prepared. The bactericidal capabilities of polydimethyldiallylammonium chloride（PDM） with series intrinsic viscosity were studied under the effect of kind, content of substrate and bacterial content. The results showed that the bactericidal rates of PDM against the 4 samples of slightly polluted water（ bacteria content 1 × 10^4 - 1 × 10^5 cells/mL） containing 0. 1% or 10% organic, inorganic substrates and the 2 samples of heavily polluted water （bacteria content 1 × 10^6 - 1 × 10^7 cells/mL） containing 10% organic, inorganic substrates increased firstly with the increase of dosage. The bactericidal rates approached to or exceeded 99% when dosage reached 4, 0. 03, 11 , 0. 10, 14, 2. 8 mg/L respectively. Thus, the content of organic substrates influenced the bactericidal performance of PDM obviously. A low content of inorganic substrates influenced the bactericidal rates of PDM least. It could be estimated that the actual dosages of PDM （ η：0. 48, 1.53, 2.52, 3.99 dL/g） were 0. 029, 0. 028, 0. 027, 0. 026 mg/L and 2.73, 2.35, 2.33, 2.31 mg/L respectively against slightly and heavily polluted water samples without substrates when the bactericidal rates reached 99%. The higher the intrinsic viscosity of PDM, the better the bactericidal performance.