牡蛎壳粉为载体的纳米ZnO催化超声降解偶氮品红溶液

Ultrasonic Degradation of Azofuchsine Catalyzed by Nanocrystalline ZnO Carried on Oyster Shell Powder

采用实验室合成的以牡蛎壳粉为载体的纳米ZnO催化剂,以偶氮品红超声降解反应为模型,研究了各种因素对偶氮品红超声降解反应的影响。结果表明,在ZnO作用下超声降解偶氮品红的效果明显优于纳米ZnO和单纯使用超声波的情况。超声波频率25 kHz,输出功率50 W,催化剂用量800 mg/L,pH值3.0,偶氮品红水溶液初始浓度20 mg/L的条件下,3 h左右降解率即可达到90%以上,COD的降低率也达到了90%。

Ultrasonic degradation of azofuchsine catalyzed by nanocrystalline ZnO carried on oyster shell powder was studied, and effect of various factors were investigated. Result showed that effect of ultrasonic degradation catalyzed by nanocrystalline ZnO was obviously better than that only by nano ZnO or by ultrasonic degradation. The degradation rate of asofuchsine was 90% in 180 min and the elimination rate of COD was close to 90% at ultrasonic frequency of 25 KHz, power input of 50 W, amount of catalyst 800 mg/L, pH 3.0 and the initial dye concentration of 20 mg/L.