Spectroscopic characterization of the reduction and removal of chromium (VI) by tropical peat and humin

► The reduction of Cr(VI) to Cr(III) was characterized by multiple techniques. ► Use of peat or its fraction as adsorbents for the reduction/remotion of Cr(VI). ► Removal capacity of chromium was increased at lower pH. ► Removal efficiencies of chromium increased with the reduction of Cr(VI) to Cr(III).