Removal of chromium (VI) in aqueous solution by oat biomass (Avena sativa) [Remoción de cromo (VI) en solución acuosa por biomasa de avena (Avena sativa)]

Chromium (VI) removal capacity in aqueous solution by oat biomass was analyzed by the diphenylcarbazide method. Bioadsorption was evaluated at different pH values (1, 2, 3 and 4) and at different times. The effect of temperature in the range of 28 °C to 60 °C and the removal at different initial Cr (VI) concentrations of 200 to 1000 mg/L were also studied. The highest bioadsorption (100%25 with 100 mg/L of the metal and 1 g of biomass) was at 8 h, at pH of 1.0 and 28 °C. With regard to temperature, the highest removal was to 60 oC, with a 100%25 removal at 90 min. Removal was more efficient when higher concentrations of biomass were used (100%25, 3 h and 5 g of biomass). Untreated biomass (washed and ground biomass) showed excellent metal removal capacity in situ, 82.6%25 and 85.3%25 removal in contaminated soil and water, respectively, after 10 days of incubation, using 25 g of the biomass (100 mL of water). These results show that Cr (VI) can be removed from industrial wastewater using oat biomass. © 2017 Universidad Autonoma de Tlaxcala. All right reserved.

VIVO