The aim of the present work was to investigate the adsorption of toxic metal ions copper. nickel and zinc from aqueous solutions using low cost natural biomass (sugar cane bagasse and green coconut fiber) in pilot scale fixed-bed system. The Hydraulic retention time (HRT) was 229 minutes and the lowest adsorbent usage rate (AUR) found was 0. 10 g. https://www.getpureroutine.com/