title: Uranium biosorption by Padina sp. algae biomass: kinetics and thermodynamics.
abstract: BACKGROUND
  Kinetic, thermodynamic, and equilibrium isotherms of the biosorption of uranium ions onto Padina sp., a brown algae biomass, in a batch system have been studied.
  
  
  CONCLUSIONS
  The kinetic data were found to follow the pseudo-second-order model. Intraparticle diffusion is not the sole rate-controlling factor. The equilibrium experimental results were analyzed in terms of Langmuir isotherm depending with temperature. Equilibrium data fitted very well to the Langmuir model. The maximum uptakes estimated by using the Langmuir model were 434.8, 416.7, 400.0, and 370.4 mg/g at 10°C, 20°C, 30°C, and 40°C, respectively. Gibbs free energy was spontaneous for all interactions, and the adsorption process exhibited exothermic enthalpy values. Padina sp. algae were shown to be a favorable biosorbent for uranium removal from aqueous solutions.
authors: Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, PO Box 14395, 836 Tehran, Iran. mhkhani@aeoi.org.ir
authors: Mohammad Hassan
authors: MH
authors: Khani
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