Quitosana como adsorvente para remoção de cor em solução aquosa de corante reativo

Abstract

Industrialization and urbanization have gradually increased the amount of pollution load on the environment and left exposed the man, fauna and flora, increasingly this pollution. With that concern you have with the environment is becoming more apparent because of the lack of care with it, generates irreversible damage. The textile industry is a major cause of environmental damage. The effluents from the industry bring with them a huge amount of pollution load, among them are the dyes that color adheres to textile substrates. Therefore both the adsorbent and the adsorbate was analyzed by X-ray fluorescence (XRF), to verify the chemical composition of the material; X-ray diffraction (XRD) to verify the phases formed; infrared spectroscopy to determine functional groups; Thermal analysis to verify the thermal stability of the materials; and microscopy (SEM) to verify the morphology of the material; spectroscopy ultraviolet - visible (UV) light , to measure how much light has been absorbed by the sample; and analyzed chitosan saturation time in relation to the dye. As a result, it was found that chitosan is quite effective for adsorbing the dye in the study. In just 90 minutes, the pH 6, and saturated chitosan adsorbed 97.73% of the dye contained in the solution. The adsorption is more efficient to more acidic pH values and the saturation time obtained, the desired adsorbent mass is above 0.1g. In addition to these results was studied in relation to the Langmuir adsorption isotherms Freundlich equation and is further adapted to process was the Langmuir with dimensionless factor of 0.058 , indicating that the adsorption process was favorable .