Adsorption of Malachite green Dye from aqueous solution onto Iraqi Raw AL-Hussainiyat deposit.

Saadiyah Ahmed Dhahir, Enaas Abdul-Hussein, Noor Faraj


The adsorption of Malachite Green (MG) cationic dye by AL- Hussainiyat deposit was firstly studied in a batch system for various dye concentrations. The adsorption was studied as a function of contact time, adsorbent dose, pH, and temperature under batch adsorption technique. The concentration of the solution before and after adsorption was measured spectrophotometrically .The equilibrium data fit with Langmuir, Freundlich models of adsorption and the linear regression coefficient R2 was used to elucidate the best fitting isotherm model. Different thermodynamic parameters, like Gibb’s free energy, enthalpy and entropy of the on-going adsorption process have also been evaluated. The thermodynamic analyses of the dye adsorption on AL- Hussainiyat deposit indicated that the system was endothermic in nature .

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