Surface characterization and comparative adsorption properties of Cr(VI) on pyrolysed adsorbents of Acacia mangium wood and Phoenix dactylifera L. stone carbon

► Adsorbents were prepared from natural renewable biomass by pyrolysis. ► Surface characterization was done with the help of suitable techniques. ► Low pH favours the adsorption for both adsorbents. ► Wood carbon showed higher adsorption capacity than stone carbon.