The biosorption of CI Reactive Black 5 (RB5) from aqueous solution, using the brown
seaweed, Laminaria sp., was investigated in both batch and column modes of operation.
Protonation of the native Laminaria biomass, with 0.1 M HCl, considerably improved its RB5
biosorption capacity. Evidence from FT-IR spectra confirmed the participation of amine
groups in the biosorption of RB5 and the mechanism was proposed to be electrostatic
interaction between the positively charged amine groups and negatively charged RB5. At …

The goal of this study was to survey the feasibility of the biosorption of Reactive Black 5
(RB5) from aqueous solutions using biomass prepared from potato peel waste. Adsorption
isotherms were constructed, and the kinetics of dye adsorption were studied. Langmuir and
Freundlich isotherms were constructed, and pseudo-first order, pseudo-second order, and
modified pseudo-first order kinetic models were studied. Maximum adsorption (85.5%) was
observed at a pH of 3, and uptake decreased with increasing pH. The biosorption of RB5 …