摘要
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1500 mg/L,反应时间60 min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1000 mg/L二氧化氯和5 g MnO2-SiO2催化剂催化氧化30 min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.
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 optimum pH value was 1.2,the dosage of chlorine dioxide was 1 000 mg/L,and the dosage of MnO2-SiO2 catalyst was 5 g after reacting for 30 min.The BOD5/CODcr of original wastewater improved from 0.22 to 0.71.The ability to biologically treat the difficult degradation wastewater improved.The catalyst did not lose activity when used nine times.The IR spectra indicated that the active ingredient of the manganese dioxide was linked with silicone by a chemical bond,not merely mechanical blending.
出处
《山东大学学报（工学版）》
CAS
2008年第6期76-81,共6页
Journal of Shandong University（Engineering Science）
基金
山东省环境保护重点科技资助项目[2006]002
关键词
二氧化氯
催化氧化
二氧化锰
难降解废水
萘酚绿
chlorine dioxide
catalytic oxidation
manganese dioxide
difficult degradation wastewater
naphthol green B
