capacidad de adsorción de la cascarilla de arroz para remover Cromo contenido en agua contaminada a escala laboratorio

Abstract

Heavy metals in recent years have caused great damage to water bodies and therefore to public health, due to the fact that their presence in the water resource generates characteristics of toxicity and causes damage to the environment, mostly expensive techniques have been necessary for its removal, which has given rise to research related to the treatment of these contaminated waters using a technique known as biosorption. Chromium is one of the heavy metals that presents major environmental and public health problems; This metal is easily found in water poured by industrial activities that require it within its processes, such as tanneries, wood preservation and aerosols; generating impacts on public health such as carcinogenic and mutagenic effects. In this project the efficiency of the rice husk to remove these concentrations of Chromium contained in water was determined. For this, 3 particle sizes were evaluated through sieves and 2 retention times to determine what incidence they have with respect to the removal of Chromium. Additionally, the removal was evaluated using activation with hydrogen peroxide, in order to determine if this removal is optimized through this technique. From the results obtained in the treatments developed within this proposal, it is stated that the rice husk is a viable material for the treatment of waters contaminated with chromium since removal values corresponding to 93% were obtained under the technical conditions of a particle size of 600 µm, retention time of 720 minutes, activation of the husk before the removal process with hydrogen peroxide and finally a temperature in the laboratory of 20 ° C.