SUNSET YELLOW DYE ADSORPTION FROM AQUEOUS SOLUTIONS USING ACTIVATED CARBONS DERIVED FROM AGRICULTURAL WASTE
Abstract
In this work was studied the adsorption of sunset yellow dye with different type of activated
carbon obtained from vegetable waste. The carbons were characterized by infrared
spectroscopy, X-ray diffraction and electron microscopy, obtaining typical results for
carbonaceous materials. Surface areas of activated carbon were determined by nitrogen
isotherms. Similarly, dye removal isotherms were evaluated taking into account, contact time
effect, pH, initial concentration and amount of adsorbent. Corn cob carbons, showed highest
removal percentage with respect at the carbons of coconut husks and rice husks. Langmuir’s
isotherm model is adjusted more appropriately to these results. We found that, pseudo second
order kinetics model describes in good agreement the adsorption of sunset yellow dye with
activated carbons.
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