Remoción del colorante rojo allura en solución acuosa utilizando carbones activados obtenidos de desechos agrícolas

Abstract

The removal of allura red dye with different type of activated carbon obtained from vegetable waste was studied. The carbons were characterized by infrared spectroscopy, X-ray diffraction and electron microscopy obtaining typical results for carbonaceous materials. The 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 higher removal percentage with respect to the carbons of coconut husks and of rice husks. Langmuir's isotherm model showed better correlation of these results. It was found that a pseudo second order kinetics model well describes the adsorption of allura red dye with activated carbons.