偶氮染料在聚丙烯腈纤维铁催化剂存在下的降解反应动力学研究  

Degradation kinetics of azo dyes in presence of Fe modified polyacrylonitrile fibrous catalyst

作　　者：韩振邦[1] 董永春[1] 杜芳[1] 

机构地区：[1]天津工业大学纺织学院,天津300160

出　　处：《天津工业大学学报》2008年第5期93-96,100,共5页Journal of Tiangong University

基　　金：国家自然科学基金项目(20773093);教育部高等学校博士点专项基金项目(20070058005)

摘　　要：使用水合肼和盐酸羟胺对聚丙烯腈进行改性后与氯化铁反应制得聚丙烯腈纤维铁配合物(PAN-Fe),在过氧化氢存在下将其作为非均相Fenton反应催化剂用于2种水溶性阴离子偶氮染料的氧化降解反应中,重点考察了催化剂用量及其铁离子含量和水溶液中的染料浓度等因素对染料降解反应速率常数的影响.结果表明,在使用PAN-Fe作为非均相Fenton催化剂时,偶氮染料的氧化降解反应可以使用假一级反应动力学模型进行描述.催化剂用量及其铁离子含量的增加都可以显著提高偶氮染料降解反应速率常数,偶氮染料初始浓度的升高导致其降解反应速率常数的下降.Polyacrylonitrile （PAN） fibre was modified by treatment with a mixture of hydrazine and hydroxylamine and then with ferric chloride, and then used as the heterogeneous photocatalysts for the oxidative degradation of two azo dyes in the presence of H2O2. Some factors effecting degradation kinetics of azo dyes such as dosage of catalysts, metal cation content, and dye concentration were examined. The results indicated that the degradation of azo dyes was described by using pseudo-first-order reaction kinetic model. Moreover, increasing the dosage of catalysts and enhancing metal cation content led to high reaction rate constant and increasing dye concentration caused low reaction rate constant.

关 键 词：聚丙烯腈 铁离子 偶氮染料 降解 动力学 

分 类 号：TS190.2[轻工技术与工程—纺织化学与染整工程] X791[轻工技术与工程—纺织科学与工程]