O_3协同内电解处理分散艳蓝E-4R废水的研究

基于印染废水具有成分复杂、色度高、难降解物质多等特点,采用臭氧协同内电解(IE/O3)对分散艳蓝E-4R进行处理。实验结果表明,在染液浓度为1 g/L加入铁屑量为300 g,通臭氧进气量为150 L/h,pH=11,反应温度为40℃,铁屑粒径为0.9~2 mm,铁炭比为1∶1时处理效果最佳,脱色率、CODC r去除率和TOC去除率分别为99.66%,75.94%和56.84%。臭氧协同内电解在最佳条件下处理染液的脱色率和CODC r去除率均明显高于二者单独作用,CODC r去除率分别比单独作用高59.03%和37.63%。另外,比较降解染液中的有机卤化物的含量,发现在协同作用下对该染料的降解更为彻底,矿化程度更高,有机氯化物去除率达到50.60%。

Study of the disposal of disperse blue E-4R dye wastewater with internal electrolysis enhanced by ozone

Due to the complexity,high color and the difficulty of degradation for dye wastewater,disperse blue E-4R,acted as a representative dye,was disposed by internal electrolysis combined with ozone(IE/O3) in the present study.For 1 g/L disperse blue E-4R model solution,the optimized experimental conditions are as follows:Three hundred grams with a diameter of 0.9～2 mm mixed with same weight carbon,the flow rate of O3 was 150 L/h,the pH of model solution was 11,and reaction temperature was 40 ℃.The removal rate of color,CODCr,and TOC under the previously described optimum conditions were 99.66%,75.94%,and 56.84%,respectively.The removal rate of color and CODCr by IE/O3 were significantly superior to those obtained from internal electrolysis or O3 alone employed.For example,the removal rate of CODCr by IE/O3 exceeded 59.03% by internal electrolysis and 37.63% by O3,respectively.Additionally,the measurement of adsorbable organic halide(AOX) showed the removal of AOX was up to 50.6% when IE/O3 was employed,which also indicated the higher efficiencies of decolorization and mineralization compared to those in the case of internal electrolysis or O3 alone.