Artículo
Efficient removal of crystal violet dye from aqueous solutions by vitreous tuff mineral
Autor
BLANCO FLORES, ALIEN; 507915
COLIN CRUZ, ARTURO; 35017
Gutiérrez Segura, Edith Eriela; 170350
Sánchez Mendieta, Víctor ; 13230
Solís Casados, Dora Alicia; 121120
Garrudo Guirado, Miguel Angel;x1242578
Batista González, Rolando;x1242579
BLANCO FLORES, ALIEN
COLIN CRUZ, ARTURO
Gutiérrez Segura, Edith Eriela
Sánchez Mendieta, Víctor
Solís Casados, Dora Alicia
Garrudo Guirado, Miguel Angel
Batista González, Rolando
Institución
Resumen
Textural, structural and morphological characteristics of the vitreous tuff were determined by means of several physicochemical techniques. The nitrogen adsorption isotherm at 77K was fitted with the Brunnauer–Emmet–Teller model and together with the results of the average pore distribution showed a mesoporous material. Samples of vitreous tuff were used as adsorbent to study the removal of crystal violet from aqueous solution. The presence of -OH moieties in the material seems to be responsible for the removal of the dye showing that vitreous tuff can be used as an organic dye adsorbent material. The pseudo-second-order model was the best fit model for describing the sorption process of crystal violet; intraparticle diffusion being the controlling step in the process. The experimental adsorption isotherm was fitted with Langmuir, Freundlich and Langmuir–Freundlich models, showing better correlation with the second one. The adsorption capacity was 170.01 mg/g, being among the highest compared with other inorganic and organic common sorbent materials. The design of single stage of the adsorber can predict the behaviour to potential scale up. This mineral has a very good potential as an adsorbent material for organic dyes. CONACYT scholarship [Grant No. 507915], Universidad Autónoma del Estado de México, project 3211–2012 and PROMEP/103.5/13/6535 project.