Competitive biosorption of heavy metals from aqueous solutions onto Streptomyces rimosus

Radia Yous (1) , Faroudja Mohellebi (2) , Hakima Cherifi (1) , Abdeltif Amrane (3)

1 Université Yahia Fares de Médéa
2 ENP - École nationale polytechnique [Alger, Algérie]
3 ISCR - Institut des Sciences Chimiques de Rennes

The aim of this study is the simultaneous biosorption of Cd+2 and Ni+2 on a dead biomass, Streptomyces rimosus pretreated with NaOH (0,1 M). Kinetic tests were carried out for the binary mixture (cadmium-nickel) during 6 hours contact time to ensure that balance was reached. The amounts adsorbed at equilibrium were 22.8 mg Ni2+/g and 9.86 mg Cd2+/g biomass, respectively. The biosorption depends mainly by some parameters, such as the pH, the initial concentration of metal and the initial concentration of biomass. The isotherm of adsorption according to two models, Langmuir and Freundlich, was carried out in our study. The results of the kinetics of adsorption show that the experimental values are well represented by the kinetic model of pseudo-second order. This enables us to determine the behavior of these adsorbents with respect to a real industrial effluent.

Mots clés: Nickel; Cadmium; Streptomyces rimosus; Wastewater Treatment; Batch Biosorption

Domaines: Autre; Ingénierie de l'environnement

Radia Yous, Faroudja Mohellebi, Hakima Cherifi, Abdeltif Amrane. Competitive biosorption of heavy metals from aqueous solutions onto Streptomyces rimosus. Korean Journal of Chemical Engineering, 2018, 35 (4), pp.890-899. ⟨10.1007/s11814-018-0004-1⟩. ⟨hal-01807071⟩