Removal of organic pollutant from wastewater using Nano Carbon synthesized from wood waste biomaterial as an adsorbent

Abstract

With the help of eco-friendly waste materials like Manila tamarind tree bark and shells (Pithecellobium Dulce), the malachite green dye has been removed from wastewater in this investigation. The maximum adsorption of dye was achieved at pH 6.7 in the research work. The removal percentage of Malachite green dye was found to be dependent on the initial concentration of dye solution, and the maximum removal percentage was found to be 85% at 25 mg/L of Malachite green dye. The experimental methods were carried out using the batch adsorption technique. The pH parameter, temperature, adsorption dose, and contact time for the removal of Malachite green dye were studied. The Freundlich, Langmuir, and Temkin methods were used to calculate equilibrium adsorption data. The thermodynamic parameters such as a change in free energy (G0 ), enthalpy (H0 ), and entropy (S0 ) were determined. The negative values of G0 indicated that the process of dye removal was spontaneous at all values of temperature. Further, the values of H0 indicated the endothermic nature of the process of dye removal from the wastewater.