Abstract

ENSUNCHO, Adolfo E.; ROBLES, Juana R.  and  CARRIAZO, José G.. Sunset yellow dye adsorption from aqueous solutions using activated carbons derived from agricultural waste. Rev. Soc. Quím. Perú [online]. 2015, vol.81, n.2, pp.135-147. ISSN 1810-634X.

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.

Keywords : Activated carbon; sunset yellow; Langmuir’s isotherm; pseudo second order kinetics model; nitrogen isotherms.

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