Produção Nacional
Revisado por pares
Interactions of anionic dyes with silica–aminopropyl
2005; Elsevier BV; Volume: 297; Issue: 1 Linguagem: Inglês
10.1016/j.jcis.2005.10.003
ISSN1095-7103
AutoresAntonio R. Cestari, Eunice F.S. Vieira, Esdras S. Silva,
Tópico(s)Electrochemical Analysis and Applications
ResumoIn this work silica–aminopropyl (Sil–NH2) was synthesized and employed to evaluate the quantitative roles of temperature, pH, dye concentration, and Hg(II) or anionic surfactant SDB interferents in the adsorptions of blue and red remazol dyes in aqueous medium using four distinct 24 factorial designs. The results were analyzed statistically using multiple regressions, Student's t-test, analysis of variance, and F-test. Polynomial modelings were used to define the most important factors affecting dye adsorption. The results indicate that the principal effects of dye concentration and pH, as well as most of the interactions of all factors, are statistically very important in relation to the equilibrium adsorption quantities. However, the adsorption Gibbs free energies are influenced, in general, only by pH, dye concentration, and some binary interactions. Temperature changes do not affect the ΔG values significantly.
Referência(s)