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Research Article Open Access
A Cuban mineral was used to evaluate its adsorption capacity in the removal of crystal violet (CV) from aqueous solutions. The mineral was characterized by several physicochemical techniques. Both N2 adsorption-desorption isotherm at 77K, fitted with the Brunnauer–Emmet–Teller model, and the results of the average pore distribution revealed that the Cuban mineral used in this study is a mesoporous material. The FTIR spectrum indicated a high content of carbonate species; however, the XPS spectrum also revealed the presence of silicon species on the surface of the adsorbent, which suggests the coexistence both carbonate and silicate species in the raw material. The efficiency for CV removal, the role of the contact time and of the initial concentrations of the adsorbate was evaluated in this study. The adsorption kinetic was fitted with the pseudo second order model. This result indicated that the adsorption mechanism was through chemisorption process between CV and Cuban mineral. The results showed that CV adsorption isotherm was best described by the Langmuir model. The adsorption capacity for CV was 55.63 mg/g. The abundant deposits, low cost and easy access make of mineral SAN1 a good natural adsorbent to treat large volumes of dye polluted waters.
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Author(s): Heidy Fernández-Hechevarría, Juan A Cecilia, María I Garrudo-Guirado, Juan M Labadie-Suarez, José L Contreras-Larios, Miguel A Autie-Pérez and Enrique Rodríguez-Castellon*
Contamination, Adsorption, Crystal violet, Cuban mineral., Plant sciences and Environmental sciences