Source: https://www.researchgate.net/profile/Aboua_Narcisse/publication/329375183_Adsorption_of_methyl_orange_on_activated_carbons_in_aqueous_solutions_influence_of_activating_chemical_agent_concentration/links/5c05836e92851c6ca1fc2285/Adsorption-of-methyl-orange-on-activated-carbons-in-aqueous-solutions-influence-of-activating-chemical-agent-concentration.pdf