Topic
Vermiculite
About: Vermiculite is a research topic. Over the lifetime, 2320 publications have been published within this topic receiving 37142 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the morphological properties of vermiculite particles obtained by sonication followed by separation into different size fractions (0.1 − 0.2, 1 − 2 and 10 − 20μm) were determined.
46 citations
46 citations
TL;DR: In this article, the adsorption of Cr(VI) from aqueous solution by Turkish vermiculite was investigated in terms of equilibrium, kinetics, and thermodynamics.
Abstract: The adsorption of Cr(VI) from aqueous solution by Turkish vermiculite were investigated in terms of equilibrium, kinetics, and thermodynamics. Experimental parameters affecting the removal process such as pH of solution, adsorbent dosage, contact time, and temperature were studied. Equilibrium adsorption data were evaluated by Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models. Langmuir model fitted the equilibrium data better than the Freundlich model. The monolayer adsorption capacity of Turkish vermiculite for Cr(VI) was found to be 87.7 mg/g at pH 1.5, 10 g/L adsorbent dosage and 20°C. The mean free energy of adsorption (5.9 kJ/mol) obtained from the D–R isotherm indicated that the type of sorption was essentially physical. The calculated thermodynamic parameters (ΔG o , ΔH o and ΔS o ) showed that the removal of Cr(VI) ions from aqueous solution by the vermiculite was feasible, spontaneous and exothermic at 20–50°C. Equilibrium data were also tested using the adsorption kine...
45 citations
TL;DR: In this paper, a vermiculite from Egypt was chemically activated by leaching with 0.5 m HCl solution or by treatment with 30% H 2 O 2 solution.
45 citations
TL;DR: In this article, an in situ experimental method in which a cationic exchange resin, a chelating resin and a test-mineral (vermiculite) were placed in permeable bags and inserted into various soil horizons.
45 citations