Remoción de plomo y cadmio presente en aguas residuales mineras mediante biosorción en columnas con bagazo de caña y cáscara de cacao

Abstract

In the province of the Oro sector of Portovelo, are located some artisanal mining companies whose residues, product of the extraction, pollute the waters of the rivers and through analysis it has been encountered that lead and cadmium are outside the norm TULSMA. In this work a study was performed on fixed bed columns using as biosorbents cocoa shell and sugar cane bagasse for which were prepared synthetic solutions with similar characteristics encountered in the wastewater of the mines. To describe the behavior in columns in the process of adsorption of the lead ions and cadmium ions were used different mathematical models as Yoon-Nelson, Thomas and dose-response. Through the modeling of the process was demonstrated that the studied parameters theoretically approach to them experimental. The model of Yoon and Nelson and dose-response reproduced satisfactorily the curve of rupture in function of time, furthermore the model of dose - response is the one that has a best adjustment for the simulation of the curve of rupture in function of the volume of treated effluent.