Sorção de cromo em resíduo sólido orgânico.

Abstract

The metals in spite of being natural components of the environment, when present in high concentrations, represent risks to the health. Actually, researches have been developed with the purpose of retention of liquid and solid effluents. An alternative process is the sortion. Materials of biological origin as the biosorbents have the capacity to adsorb and/or to absorb metallic ions. Among these materials, are the woven of vegetables (peel, pulp, seed) that also present the capacity to accumulate heavy metals. Considering the sortion properties of the organic solid residues, a system of vertical columns was set up with fixed beds of equal volumes of Organic Solid Residue (OSR) originating from the Empresa Paraibana de Alimentos e Serviços Agrícolas - EMPASA. In those columns solutions of chloride of chrome hexahydrated were passed, prepared with concentration of 50 mg L-1. The analysis of the effluent solutions collected at each 12 days during a period of 60 days, was done through specterphotometry of atomic absorption. The analysis of the results of this work showed that the OSR has good capacity in the sortion of chrome.