聚卤树脂对饮水的消毒效果

EFFICACY OF POLYHALOGEN RESININ DISINFECTION OF DRINDING WATER

以研制的聚卤树脂（含碘与溴）进行试验，对脱氯自来水作用４与７秒钟，可使水中大肠杆菌与噬菌体的存活率对数值降至－５以下。其对海河水的消毒效果略优于三碘树脂，生产成本亦较后者低２０％。

Polyhalogen resin(conta intng iodine and bromine) was synthesized in laboratory. Pas-sage for 2 s of the distillcd water containing Escherichia coli through the polyhalogen resincolumn( 6 cm in length ) could cause decrease in logarithm of survival rate of E coli to low-er than-5. Similar treatment of dechlorinated tape water containing E coli or f_2 phage for4 and 7 s respectively also caused decrease in logarithm of survival rates of E. coli andf_2 phage in water to lower than-5. Tests for influencing factors indicated that water tempera-tures ranging from 5 to 20℃,water pH values ranging from 5～ 9and water turbidity valuesranging from 10 to 60 degree had no significant influence on disinfection efficacy. Increase inspeed of water passage could reduce the disinfection efrlcacy. Comparison between polyhalogen resin and triiodine resin in disinfection of distilledwater and dechlorinated tap water indicated similar efficacy of these two resins in killing E.coli and inactivating f_2 phage, while the efficacy of polyhalogen resin was slightly better thanthat of triiodine resin in killing E.coli in disinfection of Hai river water. The cost for pro-duction of polyhalogen resin is lower than that for triiodine resin because the former has low-er residual iodine, higher iodine conversion rate and requires less amount of water for washingas compared with the latter.