Paper Title
Study of The Adsorbent Capacity of Activated Carbon Prepared from Cypress for The Removal of An Anionic Dye

Abstract
The aim of the present work is the preparation of an activated carbon from a vegetable waste recovered after extraction of essential oil of cypress and its use for the dye wastewater treatment. Cypress needles were activated with phosphoric acid to an impregnation ratio 1:1, a temperature of 600 ° C and a carbonization time of 2 hours. The surface structure of the activated carbon was analyzed by scanning electronic microscopy (SEM). The batch adsorption studies were carried out for Remazol Brilliant Blue R (RBBR). Various parameters were varied such as contact time, initial pH, adsorbent dose, dye concentration and temperature. The adsorption equilibrium was reached at 180 minutes and the process was favored at pH 2. The dye experimental data fitted well with the Langmuir model. The maximum adsorption capacity of RBBR was 101 mg/g. The adsorption of the dye was best described in terms of a pseudo second-order reaction. Thermodynamic parameters such as ΔHo, ΔSo and ΔGo were calculated and the adsorption process was found to be exothermic and spontaneous. Finally, activated carbon prepared from waste of Cypress needles was shown to be a promising material for adsorption of RBBR from aqueous solutions. Keywords- Remazol Brilliant Blue R (RBBR), Adsorption, Cypress, Anionic Dye, Activated Carbon