A production method of an adsorbent material, suitable to use for removing sulfur compounds released in petroleum refineries, petrochemical facilities and in any kind of chemical and refining processes from their gaseous environment, comprising porous petcoke and metals extracted by treating red mud in 5M hydrochloric acid solution medium and adsorbed on the surface of petcoke, characterized by comprising the steps of: - introducing carbon dioxide gas and water vapor on petcoke in an enclosed medium at the first temperature from 500 to 760°C for a first period of time which is 1 hour; - raising the temperature of the medium to a second temperature from 800 to 1200°C; - Introducing carbon dioxide gas and water vapor on petcoke for a second period of time which is 3 hours; - cooling the resulting product after the second period of time to react petcoke with carbon dioxide and water vapor, to partially gasify the petcoke, - to increase the surface area of petcoke; - bringing together red mud with an acid solution at a third temperature from 50 to 75°C and stirring it for a third period of time which is 3 hours and then leaving it to stand under room conditions for a fourth period of time which is 12 hours so that the metals in red mud are extracted into the solution; - filtering the metal-containing mixture such that the red mud residue and the metal-containing filtrate are separated from each other; - adding the metal-containing filtrate on petcoke with an increased surface area; - stirring it at a fourth temperature from 50 to 75°C for a fifth period of time which is 3 hours and leaving the mixture of filtrate and petcoke to stand under room conditions for a sixth period of time which is 12 hours; - filtering the mixture to separate metal-loaded petcoke and filtrate from each other and - drying the metal-loaded petcoke and calcining it at a fifth temperature from 300 to 600°C for a seventh period of time which is 4 hours to give an adsorbent material. - introducing carbon dioxide gas and water vapor on petcoke in an enclosed medium at the first temperature from 500 to 760°C for a first period of time which is 1 hour; - raising the temperature of the medium to a second temperature from 800 to 1200°C; - Introducing carbon dioxide gas and water vapor on petcoke for a second period of time which is 3 hours; - cooling the resulting product after the second period of time to react petcoke with carbon dioxide and water vapor, to partially gasify the petcoke, - to increase the surface area of petcoke; - bringing together red mud with an acid solution at a third temperature from 50 to 75°C and stirring it for a third period of time which is 3 hours and then leaving it to stand under room conditions for a fourth period of time which is 12 hours so that the metals in red mud are extracted into the solution; - filtering the metal-containing mixture such that the red mud residue and the metal-containing filtrate are separated from each other; - adding the metal-containing filtrate on petcoke with an increased surface area; - stirring it at a fourth temperature from 50 to 75°C for a fifth period of time which is 3 hours and leaving the mixture of filtrate and petcoke to stand under room conditions for a sixth period of time which is 12 hours; - filtering the mixture to separate metal-loaded petcoke and filtrate from each other and - drying the metal-loaded petcoke and calcining it at a fifth temperature from 300 to 600°C for a seventh period of time which is 4 hours to give an adsorbent material. <EOS>