二氧化氯催化氧化处理萘酚绿模拟废水的实验研究

研究了利用二氧化氯直接氧化和催化氧化处理萘酚绿模拟废水，单纯用二氧化氯化学氧化处理COD为1533?mg/L的萘酚绿废水时，最佳pH值为1.2，二氧化氯投加量为1500?mg/L，反应60?min，COD去除率为45.3%，BOD5去除率为11.2%，脱色率为92.5%.在最佳pH值为1.2，经过1500?mg/L二氧化氯和0.25?g TiO2催化氧化60?min后，COD去除率为52.5%，BOD5去除率为48.1%，脱色率为96.4%.结果表明，萘酚绿经化学氧化和催化氧化后，分子中萘环被氧化降解为羧酸和萘醌，并进一步降解为无机物，提高了废水的可生化性，为难降解废水的后续处理创造了条件.

Study on the catalytic oxidation of simulated wastewater containing naphthol green B with chlorine dioxide as oxidant

This paper studied the direct oxidation and catalytic oxidation of simulated wastewater containing naphthol green B with chlorine dioxide as oxidant.The COD,BOD removal efficiency,and decolor efficiency are 45.3%,11.2%,and 92.5%,respectively,at the condition of wastewater's COD 1533 mg/L,the optimum pH value 1.2,the dosage of chlorine dioxide 1500 mg/L by reacting for 60 min.The COD,BOD removal efficiency,and decolor efficiency are 52.5%,48.1%,and 96.4%,respectively,at the condition of wastewater's COD 1533 mg/L,the optimum pH value 1.2,the dosage of chlorine dioxide 1500 mg/L,the dosage of TiO_2 0.25 g by reacting for 60 min.The result indicates that the naphthalin ring in Naphthol green B molecule is degraded as organic acid and benzoquinone,and further becomes inorganic substances by chlorine dioxide direct oxidation and catalytic oxidation so that the ability to biology treatment of the difficulty degradation wastewater is improved,which is good for the further treatment.