二氧化锰催化二氧化氯氧化处理萘酚绿模拟废水的实验研究

研究了二氧化氯直接氧化和催化氧化处理萘酚绿模拟废水.二氧化氯化学氧化处理COD为1533mg/L的萘酚绿废水，在最佳pH值为1.2，二氧化氯投加量为1500mg/L，反应时间60min条件下，COD去除率和脱色率分别为45.3%和 92.5%.在最佳pH值1.2，经过1000mg/L二氧化氯和5g MnO2-SiO2催化剂催化氧化30min后，COD去除率和脱色率分别为70.9%和96.8%.BOD5/CODcr由原废水的0.22提高至0.71，可生化性得到提高，为难降解废水的后续处理创造了条件.催化剂可循环使用9次而不失去活性.经红外光谱分析，催化剂有效成份二氧化锰与硅胶载体之间是以化学键的形式相连，不是简单的机械混合.

Study of manganese dioxide catalytic oxidation with chlorine dioxide as an oxidant of simulated wastewater containing naphthol green B

The direct oxidation and catalytic oxidation of simulated wastewater containing naphthol green B with chlorine dioxide as an oxidant were studied.When the wastewater's COD was 1 533 mg/L,the optimum pH value was 1.2,the dosage of chlorine dioxide was 1 500 mg/L after reacting for 60 min and the COD removal efficiency and the decolor efficiency were 45.3% and 92.5%,respectively.The COD removal efficiency and decolor efficiency were respectively 70.9% and 96.8%,when the wastewater's COD was 1 481 mg/L,the opt...