Study of chemistry of CR(VI)/Cr(III) biosorption from batch solutions and electroplating industrial effluent using cyanobacteria spirulina platensis
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YUSHIN , Nikita; ZINICOVSCAIA, Inga; CEPOI, Liliana; CHIRIAC, Tatiana; MITINA, Tatiana. Study of chemistry of CR(VI)/Cr(III) biosorption from batch solutions and electroplating industrial effluent using cyanobacteria spirulina platensis. In: Revue Roumaine de Chimie. 2019, nr. 2(64), pp. 173-181. ISSN 0035-3930.
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Revue Roumaine de Chimie
Numărul 2(64) / 2019 / ISSN 0035-3930

Study of chemistry of CR(VI)/Cr(III) biosorption from batch solutions and electroplating industrial effluent using cyanobacteria spirulina platensis


DOI: 10.33224/rrch/2019.64.2.07
Pag. 173-181

Yushin Nikita12, Zinicovscaia Inga134, Cepoi Liliana5, Chiriac Tatiana5, Mitina Tatiana4
 
1 Joint Institute of Nuclear Research,
2 International University „Dubna",
3 Horia Hulubei National Institute for Physics and Nuclear Engineering, (IFIN-HH),
4 Institute of Chemistry,
5 Institute of Microbiology and Biotechnology
 
Disponibil în IBN: 16 august 2019


Rezumat

The biosorption of Cr(III)-Cr(VI) from aqueous solutions on dry Spirulina platensis biomass was tested under laboratory conditions as a function of pH, initial metal ion concentration, biomass dosage, time and temperature. Optimum adsorption pH values of Cr(III) and Cr(VI) were determined as 3.0 and 2.0, respectively. The Langmuir adsorption isotherm model fit well the sorption equilibrium of the experimental data obtained for Cr(III), while Freundlich isotherm fit better data obtained for Cr(VI). The kinetic data were best described using the pseudo second-order kinetic model (R2> 0.99). The adsorption process was exothermic and the values of thermodynamic parameters of the process were calculated. Spirulina platensis biomass was also used as a biosorbent for the removal of Cr(VI) from electroplating industry effluent as a function of biosorbent dosage and contact time.