The experiments were carried out in 125 mL conical flasks, with continuous stirring 150 rpm in shaker type stirrer at room temperature 20°C, using a 25 mL solution volume and 5 to 50 mg L-1CrVI concentrations. Various adsorbent quantities were used, and solution pH was adjusted with NaOH and HNO3 diluted solutions.
Los ensayos se hicieron en erlenmeyers de 125 mL, continuamente agitados 150 rpm, a temperatura ambiente 20 °C, empleando concentraciones de CrVI entre 5 y 50 mg L. Se varió la cantidad de adsorbente y el pH de la solución se ajustó con soluciones diluidas de NaOH y HNO3.