Investigation of the use of Peanut pine (Pinus pinea) shells in dye adsorption

In this study, the adsorption of malachite green dye (MG) from synthetic wastewater was investigated by using pine nut shell, which is an environmentally friendly and economical material, as an adsorbent. The maximum MG adsorption capacity of pine nut (Pinus pinea) shells was calculated as 25.641 mg/g at pH 10. SEM images showed significant porosity and confirmed the adsorption of malachite green dye on the surface. After adsorption, SEM results show that the surface of pine nut shells as adsorbent is covered by MG molecules. The effect of adsorption parameters, initial dye concentration, thermodynamic parameters and pH was calculated. It has been observed that the system fits better with the Langmuir Isotherm and the pseudo-second order kinetic model. The Gibbs free energy change value is 6.041 Kj/mol (298 K). Thus, it has been shown that pine nut shells can be used as an environmentally friendly, economical and promising adsorbent for MG dyestuff from synthetic wastewater.