Accumulation of dysprosium, samarium, terbium, lanthanum, neodymium and ytterbium by Arthrospira platensis and their effects on biomass biochemical composition

Zinicovscaia Inga; Cepoi Liliana; Rudi Ludmila; Chiriac Tatiana; Grozdov Dmitrii; Pavlov Sergey; Djur (Maxacova) Svetlana

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ZINICOVSCAIA, Inga, CEPOI, Liliana, RUDI, Ludmila, CHIRIAC, Tatiana, GROZDOV, Dmitrii, PAVLOV, Sergey, DJUR (MAXACOVA), Svetlana. Accumulation of dysprosium, samarium, terbium, lanthanum, neodymium and ytterbium by Arthrospira platensis and their effects on biomass biochemical composition. In: Journal of Rare Earths, 2021, vol. 39, pp. 1133-1143. ISSN 1002-0721. DOI: https://doi.org/10.1016/j.jre.2020.07.019

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Journal of Rare Earths

Volumul 39 / 2021 / ISSN 1002-0721

Accumulation of dysprosium, samarium, terbium, lanthanum, neodymium and ytterbium by Arthrospira platensis and their effects on biomass biochemical composition

DOI:https://doi.org/10.1016/j.jre.2020.07.019

Pag. 1133-1143

Zinicovscaia Inga¹², Cepoi Liliana³⁴, Rudi Ludmila³, Chiriac Tatiana³, Grozdov Dmitrii¹, Pavlov Sergey¹, Djur (Maxacova) Svetlana³

¹ Joint Institute of Nuclear Research,
² Horia Hulubei National Institute of Physics and Nuclear Engineering,
³ Institute of Microbiology and Biotechnology ,
⁴ State University „Dimitrie Cantemir”

Proiecte:

11.817.05.11F Procese electronice şi radiative în materiale semiconductoare II-VI, activate de ionii metalelor de tranziţie şi pământurilor rare

Disponibil în IBN: 14 decembrie 2020

Rezumat

The growth of Arthrospira platensis and physiological changes in biomass under the effects of six rare earth elements Dy, Sm, Tb, La, Nd and Yb were evaluated. Elements were tested by three concentrations of 10, 20 and 30 mg/L. According to neutron activation analysis data A. platensis's accumulation capacity toward studied elements changes in the following order of La > Dy > Nd > Sm > Yb > Tb. The results show that Dy and La ions stimulate biomass growth and Yb ions inhibit it, while Sm, Tb and Nd ions do not affect biomass accumulation. The contents of proteins and chlorophyll a are not affected by the presence of rare earth elements in the cultivation medium. Studied elements affect to different extents carbohydrates, phycobilins, β-carotene, lipids and MDA contents in spirulina biomass. Changes in the antioxidant activity under applied metal loads reveal a moderate stress in exposed A. platensis. Cyanobacterium A. platensis can be successfully used for bioremediation of natural water contaminated with REEs as well as REEs recovery from low polluted industrial effluents.

Cuvinte-cheie
antioxidant activity, Arthrospira platensis, biochemical composition, neutron activation analysis, rare earth elements

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