Adsorption of methylene blue on clay minerals particles: analysis of the clay particle sizes

Química Nova

Universidade de São Paulo, São Carlos, Brasil¹  Consolin-Filho, Nelson¹  Morais, Luis Carlos de¹  Marques, Délcio Dias¹  Universidade Federal do Acre, Rio Branco, Brasil¹  Gessner, Fergus¹  Sartori, Rogerio Antonio¹ 

关键词: clays;    methylene blue;    UV-Vis spectroscopy.;   

DOI  :  10.1590/S0100-40422011000400006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Interactions of cationic dye methylene blue (MB) with clay particles in aqueous suspension have been extensively studied. As already known, the number of natural negative charges on the clay modifies significantly the particle sizes dispersed in water and therefore the nature of the interaction with the dye. This work evaluated with UV-Vis spectroscopy method how the clay particle sizes weighted on the adsorption and rearrangement of the dye molecules in aqueous system. The results obtained from light-scattering measurements confirmed that larger particles are found in suspensions containing the high-charged clays as the visible absorption band related to the MB aggregates (570 nm) on these suspensions prevailed.

【 授权许可】

Unknown