催化湿式氧化法对模拟印染废水的色度去除

Decolorization of Simulated Printing and Dyeing Effluents with CWAO Technology

为了研究催化湿式氧化(CWAO)技术对模拟印染废水色度去除的影响,以色度值为300 000的亚甲蓝水溶液作模拟印染废水,以m(Cu2+)/m(Fe2+)为1∶1的Cu1Fe1作均相催化剂,考察了催化剂用量、氧分压、反应温度、进水pH值及反应时间对水样脱色的影响.结果表明:水样脱色率随催化剂用量、氧分压、反应温度的提高以及反应时间的延长而提高;进水pH值存在极值点,水样脱色率在酸性条件下随进水pH值的降低而提高,而碱性条件下随进水pH值的升高而提高;在优化的工艺条件下,反应60 min时水样脱色率达到99.99%.

In order to study on the effect of simulated printing and dyeing effluents decolorization with catalytic wet air oxidation （CWAO） technology, methylene blue aqueous solution with chroma of 300 000 was chosen as simulated printing and dyeing effluents, and CulFel with rn （Cu^2＋ ） ： m （ Fe^2＋ ） = 1 ： 1 was used as homogeneous catalyst, then the effect of sample decolorization was investigated on catalyst dosage, oxygen partial pressure, reaction temperature, pH of influent and the reaction time. The results show that the decolorization rates of sample increases with the increase in dosage of catalyst, oxygen partial pressure, reaction temperature and prolonged reaction time. However, there is an extreme point of pH value of influent, and the decolorization rates increases with the decrease in the pH value under acidic conditions, and with the increase in the pH value under alkaline conditions. At the optimized technics conditions, the decolorization rate of sample is up to 99.99 % after such a reaction for 60 min.