Kinetics of Methyl Green Fading in the Presence of TX-100, DTAB and SDS

Bulletin of the Korean chemical society

Babak Samiey¹  Zeinab Dalvand¹ 

关键词: Methyl green;    Stoichiometric model;    Fading;    Surfactant;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The rate constant of alkaline fading of methyl green (ME2+) was measured in the presence of non ionic (TX- 100), cationic (DTAB) and anionic (SDS) surfactants. ME2+ hydrolyses and fades in neutral water and in this work we search the effects of surfactants on its fading rate. The rate of reaction showed remarkable dependence on the electrical charge of the used surfactants. It was observed that the reaction rate constant decreased in the presence of DTAB and SDS and increased in the presence of TX-100. Binding constants of ME2+ to TX-100, DTAB and SDS and the related thermodynamic parameters were obtained by classical (or stoichiometric) model. The results show that binding of ME2+ to TX-100 and DTAB are two-region and that of SDS is threeregion. Also, the binding constants of ME2+ to surfactant molecules in DTAB/TX-100 and SDS/TX-100 mixed solutions and their stoichiometric ratios were obtained.

【 授权许可】

Unknown