Chromium (VI) removal from water was studied using two varieties of pecan nut husks (PNHs): Barton and Native. Influent Cr(VI) solutions at different pH values (2.5 and 6.18) and particle sizes (0.42 and 0.85 mm) were performed. Both PNH varieties showed reduction to Cr(III) and adsorption of Cr(VI) and Cr(III). The Thomas model adequately (R2 of 0.79–0.94) describes the Cr(VI) adsorption for Barton PNH. Microscopy studies of PNH morphology showed some morphological changes attributed to chromium retention. The Barton PNH variety presented a higher Cr(VI) absorption with a longer exhaustion time (15–30 min) for both particle sizes. Native PNH for both particle sizes with a pH of 6.18 had the highest concentrations at equilibrium but short exhaustion time (10–15 min). PNH could be a sustainable alternative material for the Cr(VI) removal from contaminated waters.