Equilibrium and modelling studies for the removal of crystal violet dye from aqueous solution using eco-friendly activated carbon prepared from Sargassm wightii seaweeds

This research article describes the preparation of an eco-friendly activated carbon from sargassm wightii seaweeds for the efficient removal of crystal violet dye in an aqueous solution. the presence of hydroxyl and carboxyl and other functional groups in the adsorbent material was detected using ftir spectroscopy. the morphological studies of the adsorbent materials were done using sem and edx analysis. the physical nature of the materials was analyzed with xrd pattern studies. the batch mode dye adsorption behavior of the activated carbon was investigated as a function of dosage,solution ph,initial dye concentration,temperature and contact time. the equilibrium modeling studies were analyzed with freundlich and langmuir adsorption isotherms and the adsorption dynamics was predicted with lagergren's pseudo-first order,pseudo-second order equations and intra particle diffusion model. the thermodynamic parameters,like standard gibbs energy (δg0),enthalpy (δh0),and entropy (δs0),were determined for the considering the feasibility of the adsorption process. the results from the experimental and correlation data revealed that the activated carbon prepared from sargassm wightii seaweeds proved to be an excellent adsorbent material for the removal of dye. © 2017,university of mohammed premier oujda morocco.