Caracterización de la capacidad de remoción de cromo trivalente en efluentes pertenecientes a Curtiduría Serrano, mediante el uso de minerales arcillosos naturales y modificados.

Abstract

The objective of this research was to characterize the ability to remove trivalent chromium in effluents belonging to Serrano Curtiduría, through the use of natural and modified clay minerals from the Parish of Cacha natural and modified from the Cacha Parish, Riobamba city. The treatment of heavy metals present in wastewater by the adsorption process has proven to be an effective and promising technique for achieving chromium removal from an aqueous solution. The morphology and particle size was determined by scanning electron microscopy (SEM), chemical composition by X-ray fluorescence (XRF), mineralogical composition by X-ray diffraction (XRD) and surface area by BET analysis. Trivalent chromium readings before and after the application of clay minerals were performed by atomic absorption spectroscopy (AA). As a result of the characterization it was determined that the natural clay mineral has a mild laminar morphology; particle sizes between 3,674 and 9,299 um; through XRF and XRD it was determined that the major component is silicon oxide (SiO2) with a value of 52.14% and 68% respectively; The maximum removal was obtained when working with a neutral pH and a 2% dose of absorbent composed of clay minerals in the natural state. The study showed the potential of clay ore for the removal of Cr III in tanning effluents.