期刊论文详细信息
Química Nova
Interações entre corantes e argilas em suspensão aquosa
Miguel G. Neumann1  Fergus Gessner1  Ana P. P. Cione1  Rogério A. Sartori1  Carla C. Schmitt Cavalheiro1 
[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP
关键词: cationic dyes;    clays;    clay-dye interactions;   
DOI  :  10.1590/S0100-40422000000600016
来源: SciELO
PDF
【 摘 要 】

Adsorption of cationic dyes on clays can be used as a model for the interactions between organic compounds and these minerals. Cationic dyes like methylene blue are used to study these interactions because of the spectroscopic changes observed when their molecules are adsorbed on clay surfaces. Depending on the structure and layer charge of the clay particles several processes may occur, like adsorption of dye monomers and aggregates on the external and internal surfaces of the clay tactoids, migration towards internal surfaces, protonation, etc. Under certain conditions the deaggregation-aggregation of the clay particles are accelerated trapping dye species during these processes. A general scheme is proposed for the processes occurring between clays and dyes in aqueous suspensions, which can be used to explain the behaviour of specific systems.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

【 预 览 】
附件列表
Files Size Format View
RO202005130060815ZK.pdf 74KB PDF download
  文献评价指标  
  下载次数:3次 浏览次数:0次