Study Of Adsorption Of Rhodamine B Dye Using The Residual Biomass Of Mdf And Porongo

The present work evaluated the use of residual biomasses of MDF (Medium Density Fiber) and porongo (Langenatia siceraria), as biosorbents, in the adsorption of Rhodamine B dye (RhB) in aqueous solution. The biosorbents were characterized by nitrogen porosimetry, zeta potential (ZP), adsorption kinetics tests and determination of experimental parameters, according to Langmuir and Freundlich models. Among the tested systems, the biomass of MDF showed the highest adsorption capacity (14 %) in relation to the porongo (7.6 %), after 120 minutes of reaction, due to its compatibility of surface charge with RhB, and the largest surface area (11.67 m² g-1 of MDF and 7.33 m² g-1) and pore volume (0.030 cm³ g-1 for MDF and 0.020 cm³ g-1 for porongo).