次氯酸钠氧化降解亚甲基蓝水溶液的研究

讨论了次氯酸钠浓度、光源及pH值对亚甲基蓝水溶液降解的影响,比较了不同氧化剂双氧水和次氯酸钠对亚甲基蓝水溶液的降解效果。结果表明,次氯酸钠氧化剂比双氧水更易使亚甲基蓝水溶液降解,而且次氯酸钠的浓度越大,pH值越小,降解亚甲基蓝水溶液的效果越好。在光照条件下,次氯酸钠浓度为1.25×10-3mol·L-1时,25 min内亚甲基蓝水溶液的降解率达96.6％,COD值也下降75％以上。

Study in Oxidative Degradation of Methylene Blue Solution by Sodium Hypochloride

The effects of concentration of sodium hypochloride, light sources and pH of solution on the oxidative degradation of methylene blue were examined and degradation effects using hydrogen peroxide, sodium hypochloride as oxidants were compared. The result showed that sodium hypochloride degraded methylene blue more easily than hydrogen peroxide and the higher the concentration of sodium hypochloride, the lower the pH, the better the effects of degrading methylene blue.96.6% of methylene blue could be degraded and COD could be decrease by 75% when 1.25 mol/L sodium hypochloride was used under the light radiation.