Biosorption of lead ions by cyanobacteria Spirulina platensis: Kinetics, equilibrium and thermodynamic study
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ZINICOVSCAIA, Inga; YUSHIN , Nikita; RODLOVSKAYA, Elena N.; KAMANINA, Inna. Biosorption of lead ions by cyanobacteria Spirulina platensis: Kinetics, equilibrium and thermodynamic study. In: Nova Biotechnologica et Chimica. 2017, nr. 2(16), pp. 105-112. ISSN 1338-6905.
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Nova Biotechnologica et Chimica
Numărul 2(16) / 2017 / ISSN 1338-6905 /ISSNe 1339-004X

Biosorption of lead ions by cyanobacteria Spirulina platensis: Kinetics, equilibrium and thermodynamic study


DOI: 10.1515/nbec-2017-0015
Pag. 105-112

Zinicovscaia Inga123, Yushin Nikita14, Rodlovskaya Elena N.5, Kamanina Inna4
 
1 Joint Institute of Nuclear Research,
2 Horia Hulubei National Institute for Physics and Nuclear Engineering, (IFIN-HH),
3 Institute of Chemistry of the Academy of Sciences of Moldova,
4 International University „Dubna",
5 A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
 
Disponibil în IBN: 9 iulie 2018


Rezumat

The potential use of dry Spirulina platensis biomass to remove lead ions from aqueous solution was investigated. Effects of various parameters such as contact time, temperature, dosage of biosorbent, initial pH, and initial concentration of lead were investigated in the batch adsorption mode. The highest lead removal of 5.7 mg/g was obtained at pH 5, biomass dosage of 0.5 g, initial lead concentration of 60 mg/L. The Langmuir and Freundlich models fit the experimental data (R2 > 0.99), while the kinetic data was best described using the pseudo second-order kinetic model (R2 > 0.99). FTIR spectra indicated that the metal removal takes place through binding to OH, C=O and P=O groups. Lead was efficiently recovered from biomass by mineral acids, while using CH3COOH and NaOH as eluents the biomass maintained high biosorption capacity during three cycles. This study demonstrates the potential of using Spirulina platensis as biosorbent to remove lead from industrial wastewater.

Cuvinte-cheie
biosorption,

lead,

Spirulina platensis