Adsorptive Removal of Lead and Chromate Ions from Water by Using Iron-Doped Granular Activated Carbon Obtained from Coconut Shells

In this study, a low-cost granular activated carbon doped with Fe2O3 nanoparticles (Fe–GAC) was prepared via modified sol-gel technique and utilized for the elimination of lead (Pb(II)) chromium (Cr(T)) ions from synthetic actual brackish water. The effect adsorption parameters on removal Pb(II) Cr(T) water evaluated in batch tests. characterization results validated distribution well-defined onto GAC surface. loaded 5 wt.% (Fe–GAC 5) exhibited maximum surface area 848.2 m2 g−1. equilibrium data were close agreement Langmuir Sips models R2 values 0.95 0.96, respectively. However, greater than 0.91 all four models, i.e., Langmuir, Sips, Freundlich Redlich-Peterson. capacities by Fe–GAC at pH 5.6 room temperature 11.9 22.1 mg g−1, Pseudo-second order (R2Pb(II) = 0.99, R2Cr(T) 0.99) Elovich kinetic 1, 1) found most suitable describing kinetics using 5. adsorption/desorption studies illustrated that is reusable can be regenerated 1.0 M HCl. Moreover, effective to reduce heavy metals loading allowed international standards drinking Accordingly, could promising material large-scale applications