Adsorption of Chromium Using Apu Wood (Pistia stratiotes L) Root Bioadsorbent and Modification of Apu Wood Root

The adsorbent is a material used for the adsorption process. One alternative in selection of adsorbents biological materials. type plant that can be to adsorb heavy metals Apu Wood. This study aims examine effect Cr (VI) concentration on capacity adsorbent, time adjustment characterization using SEM and FTIR, assess equilibrium Langmuir Freundlich methods kinetics reaction pseudo order 1 2. In this study, variables are initial solution Cr(VI) 2, 4, 6, 8, 10 ppm contact 15, 30, 45, 60, 75 minutes. result research increases line with increase as adsorbate. Contact affects where longer time, until it reaches at 70 FTIR analysis both tests showed aluminum adsorbtion apu wood its modification changed composition function group structure surface area. Isoterm model produces greater value R2 than isotherm which indicates direct adsorbate attaches active site only one layer (monolayer). Kinetics adsorps 2 mechanism occurs transfer mass addition use electrons together between root.