Síntese de quitosana a partir do caranguejo uça (Ucides cordatus) utilizada na adsorção de Cu (II)

Abstract

The growing urbanization, as well as the increase of industrial activities has caused the pollution of water resources, being the heavy metals present in the industrial effluents one of the main forms of your contamination. One time the contact with such chemical species brings risk both for the nature as to men´s health. In face of this problematic it is necessary the use of effective methods for treating such effluent, being the biosorption method one of the most suitable, since it uses biological materials as base. Among the various materials that can being used as bioadsorvente, the Chitosan stands out because of characteristics, such as biofunctionability, biodegradability and biocompatibility. The present work its objective to check the ability of adsorption of Chitosan´s metal synthesized from the chitin extracted from of crabs’ shell (Ucides cordatus) in simulated samples of effluents are containing Cu (II). The collection of material was execute in a fish market of Ilha Grande city– PI, in the case of an experimental research, in that the samples, being Chitin, Chitosan 25ºC and Chitosan 80ºC was characterized by techniques of X-Ray Diffraction (XDR), X-Ray Fluorescence (XRF), Spectroscopy in the Infrared (IR), Scanning Electron Microscopy (SEM), aiming the determination of physic-chemical parameters, degree of crystallinity and morphology, as well as the determination the chemical components presents. The quantification of ions adsorbed was realized by Finite Bathing techniques and Differential Pulse Voltammetry (DPV). In that Chitosan 80ºC presented larger capacity of adsorption with 95, 80%, its larger quantification of ions adsorbed (191 mg.g-1 ) in relation to Chitosan 25ºC with adsorption capacity of 93, 3% and ions quantification adsorbed (186 mg.g-1 ), showing one viable alternative to the treatment of effluents.