Evaluación de la semilla de la mora para la remoción de cromo en aguas residuales de la industria de curtiembre

Abstract

The present research evaluates the blackberry seed, residue of the fruit pulp production industry, as a low-cost adsorbent material in aqueous solution for removal of Cr (VI). As a pretreatment the material was drying at 105 ° C, to subsequently crush it to a particle size between 212 and 425 µm, which was screened to separate into three material sizes: 212 µm, 300 µm and 425 µm. The resulting material was characterized by its moisture content, lignin, cellulose, holocellulose and hemicellulose. To evaluate the removal of Cr (VI) batch reactors were used, maintaining a complete mixture with the help of a jar tester equipment. The optimal conditions for the removal of Cr (VI) were determined, with the variation of particle size, adsorbent dose, contact time, pH and initial chromium concentration. The experimental results for the adsorption of Cr (VI) with blackberry seed were adjusted to the Freundlich isotherm, with a removal capacity of 0.53 mg/g at 17°C, using 10 grams of adsorbent with a size of 425 µm and a removal efficiency of 92.77%.