The adsorption of this dye, at pH higher than 4, was found to be pointless, since removal percentages were below 20% (using an initial dye concentration of 40 mg L1 and 0.4 g L1 adsorbent
dose). However, setting the pH at 2 and increasing the adsorbent dose to 1.2 g L1, it was possible to achieved dye removal percentages above 90%.