O_3-H_2O_2-Mn(Ⅱ)催化氧化降解直接大红4BE
|
摘要
本试验以一定浓度的直接大红4BE降解为研究目的。结果表明:直接大红4BE在气液混合泵的作用下可增溶臭氧,加速其氧化脱色降解;直接大红4BE在臭氧增溶与在双氧水投加量为1 m L/L条件下,降解效率最佳;初始p H=3.0的体系下,降解速率加快,降解的效果更好;2 mmol/L锰离子(II)促进臭氧降解直接大红4BE;直接大红4BE中的苯环和偶氮结构遭到O_3-H_2O_2破坏,最后溶液酸度增大,可能氧化降解生成低分子羧酸类物质。
This experiment degraded a certain concentration of DR4BE for research purposes.The method comprised that DR4BE can solubilize ozone under the action of gas-liquid mixing pump to accelerate its oxidative decolorization and degradation.DR4BE was best in degradation efficiency when ozone solubilization and hydrogen peroxide dosage was1 m L/L.Under the system of pH=3.0,the degradation rate was faster and the degradation effect was better.2 mmol/L manganese ion(Ⅱ)promoted ozone degradation directly to DR4BE.The benzene ring and azo structure in DR4BE were destroyed by O_3-H_2O_2,and finally the solution acidity increased and may be oxidatively degraded to form low molecular weight carboxylic acids.
This experiment degraded a certain concentration of DR4BE for research purposes.The method comprised that DR4BE can solubilize ozone under the action of gas-liquid mixing pump to accelerate its oxidative decolorization and degradation.DR4BE was best in degradation efficiency when ozone solubilization and hydrogen peroxide dosage was1 m L/L.Under the system of pH=3.0,the degradation rate was faster and the degradation effect was better.2 mmol/L manganese ion(Ⅱ)promoted ozone degradation directly to DR4BE.The benzene ring and azo structure in DR4BE were destroyed by O_3-H_2O_2,and finally the solution acidity increased and may be oxidatively degraded to form low molecular weight carboxylic acids.
引文
[1]孙振亚,杜建华,陈和生.氧氢氧化铁对偶氮染料脱色作用的红外光谱研究[J].色谱,2006,26(7):1226-1229.
[2]高志谨,秦兵杰,赵丽,等.高级氧化技术治理偶氮染料废水[J].当代化工研究,2013(4):7-10.
[3]高磊,陈宏,李立青. Fenton氧化法降解甲基橙溶液的研究[J].西南大学学报(自然科学版),2010,32(5):115-119.
[4]谢磊,胡勇有,杨润昌,等.高浓度甲基橙湿式过氧化氢氧化及机理初探[J].环境工程,2002,20(2):22-24.
[5]瞿娟,黄荣荣,赖梨芳,等. Ti O2光催化降解甲基橙性能的研究[J].常州大学学报(自然科学版),2009,21(1):18-22.
[6]王征帆,刘展晴,秦雄伟.我国废水处理中的高级氧化技术[J].广州化工,2010,38(5):26-32.
[7]王华然,王尚.臭氧在水中的溶解特性及其影响因素研究[J].中国消毒杂志,2009,26(5):481-484.
[2]高志谨,秦兵杰,赵丽,等.高级氧化技术治理偶氮染料废水[J].当代化工研究,2013(4):7-10.
[3]高磊,陈宏,李立青. Fenton氧化法降解甲基橙溶液的研究[J].西南大学学报(自然科学版),2010,32(5):115-119.
[4]谢磊,胡勇有,杨润昌,等.高浓度甲基橙湿式过氧化氢氧化及机理初探[J].环境工程,2002,20(2):22-24.
[5]瞿娟,黄荣荣,赖梨芳,等. Ti O2光催化降解甲基橙性能的研究[J].常州大学学报(自然科学版),2009,21(1):18-22.
[6]王征帆,刘展晴,秦雄伟.我国废水处理中的高级氧化技术[J].广州化工,2010,38(5):26-32.
[7]王华然,王尚.臭氧在水中的溶解特性及其影响因素研究[J].中国消毒杂志,2009,26(5):481-484.