Thermodynamic study of adsorption alcohols on natural clay by inverse gas chromatography

The adsorption of VOCs onto porous clays has been considered as an innovative research of environmental treatment. This work was performed to investigate the adsorption properties of alcohols vapors (ethanol and methanol) on natural clay using inverse gas chromatography (IGC). This method was based on the principle of the chromatography of elution in gas phase. From the IGC data, the adsorption isotherms of alcohols on natural clay were determined. These isotherms were used to calculate the thermodynamic parameters such as enthalpy and entropy and to find the appropriate adsorption model. Finally, the adsorptive performance in terms of adsorption of alcohols by natural clay has been compared to activated carbon. Keywords: Adsorption, Elution chromatography, isotherms, enthalpy, entropy

Adsorption of Basic Dyes onto Natural Clay

The adsorption ability of natural clay towards the removal of basic dyes from aqueous textile solutions was investigated. The equilibrium isotherms were measured and analyzed using the Langmuir model and the experimental results compared with the theoretical data. The adsorbent exhibited considerable adsorption capacities of 567, 526, 427 and 300 mg/g towards Neutral Red, Methyl Violet, Methyl Green and Methylene Blue, respectively. Thus, the clay may be used as a cost-effective industrial adsorbent for the removal of basic dyes from industrial effluents

Activated Carbons synthesized from sucrose using porous clay heterostructures as template for CO2 adsorption

International audienc