Definir una técnica para la reducción de cromo hexavalante en solución acuosa mediante la utilización de Musa cavendishii (Cáscara de plátano).

Abstract

In this research, a technique was defined for the hexavalent Chromium in aqueous solution with Muse cavendishii (banana peel), in the laboratories of the faculty of Sciences at Escuela Superior Politecnica de Chimborazo, for which it was needed like technical factors, two Erlenmeyer flasks 1000 ml, four glass beakers of 250 ml, pipettes, balance, constant stirrer, UVVisible

spectrophotometer and as main factors; Muse cavendishii and hexavalent Chromium, where the absorptive capacity that presents the biomass to remove hexavalent chromium was analyzed, which was subjected to a wash with demineralized water and constant stirring for 72 hours to later move to the bacteriological heater where it dried up for 24 hours to 120 ºC, and subsequently, in the four flasks containing the aqueous solution of hexavalent chromium at different pH, adjusting the conditions with nitric acid (HNO3 ) for acid pH and sodium hydroxide (Na(OH)) for basic pH, it was added in the first two flasks a concentration of 2.5 g of biomass and in the two remaining a concentration of 5g of biomass, which were stored in two bacteriological heaters to different temperatures (28 ºC and 60ºC) and they were analyzed to different times (0min, 60min, 120min, 180min) to determine the concentration of the metal in study by the method with Diphenylcarbazide. Obtaining the best result of removal metal in the conditions of; 180 min, to acid pH (1.0) and 28ºC with a value of 5g of biomass. Concluding that biomass study (Musa cavendishii) presented high removal capacity for hexavalent chromium, so it is recommended the application of this economical, easy and efficient technique, available to small and large companies of leather tanning galvanized, chemical producers, manufacturing of chrome, among others, to remove the hexavalent chromium from waste waters before its final discharge in the natural water sources (rivers) closest to its place.