The effect of RSGS and

The effect of adsorbent dose on the amount of Cr(VI) adsorbed and percentage adsorption of Cr(VI) for the RSGS and ASGS is shown in Fig. 8. The adsorption capacity and the percentage removal represented opposite trend with an increase in adsorbent dose. Adsorption capacity was decreased from 40.19 to 9.97 mg/g and 40.44 to 9.99 mg/g in RSGS and ASGS as dose increased from 0.02 to 1.0 g/L because of the leftover unsaturated adsorption sites.