|Conţinutul numărului revistei|
| SM ISO690:2012|
ZINICOVSCAIA, Inga; SAFONOV, Alexey; TROSHKINA, Irina D.; DEMINA, Liudmila L.; GERMAN, Konstantin E.. Biosorption of Re(VII) from Batch Solutions and Industrial Effluents by Cyanobacteria Spirulina platensis. In: Clean - Soil, Air, Water. 2018, nr. 7(46), p. 0. ISSN 1863-0650.
|Clean - Soil, Air, Water|
|Numărul 7(46) / 2018 / ISSN 1863-0650|
The potential of Spirulina platensis biomass for rhenium ions removal from both batch solutions and industrial effluents is evaluated. The effect of pH, contact time, initial metal concentration, and the temperature of biosorbent treatment on the biosorption process is investigated. The maximum biosorption capacity of 142.9 mg g−1 rhenium is achieved at pH 2, sorbent dosage 0.05 g, and temperature of biosorbent treatment 30 °C. The equilibrium data are well fitted by Langmuir and Freundlich adsorption isotherm models (R2 = 0.99), while the pseudo-second order kinetic model (R2 > 0.99) is found to describe better the kinetic data. Fourier-transform infrared (FTIR) spectra shows that rhenium biosorption takes place through two mechanisms: ionic interactions of perrhenate anions with amide and amino-groups and/or binding to organic functional groups of the cell surface. The rhenium bound to the biomass can be effectively stripped using NH4OH (8%) and the biomass is effectively used for three sorption–desorption cycles. In the case of industrial effluents, S. platensis biomass shows relatively high rhenium removal efficiency (51–55%). S. platensis biomass can be efficiently applied for rhenium removal from industrial effluents.
blue-green algae, FTIR, transition metals, water treatment