Growth of the Red Alga Galdieria sulphuraria in Red Mud-Containing Medium and Accumulation of Rare Earth Elements

0576235 - MBÚ 2024 RIV DE eng J - Článek v odborném periodiku
Náhlík, Vít - Čížková, Mária - Singh, Anjali - Mezricky, D. - Rucki, M. - Andresen, Elisa - Vítová, Milada
Growth of the Red Alga Galdieria sulphuraria in Red Mud-Containing Medium and Accumulation of Rare Earth Elements.
Waste and Biomass Valorization. Roč. 14, č. 7 (2023), s. 2179-2189. ISSN 1877-2641. E-ISSN 1877-265X
GRANT EU: European Commission(CZ) ATCZ172 - Interreg V-A Austria – Czech Republic
Institucionální podpora: RVO:61388971 ; RVO:60077344
Klíčová slova: Accumulation * Galdieria sulphuraria * Growth * Rare earth elements * Red algae * Red mud
Obor OECD: Ecology
Impakt faktor: 3.2, rok: 2022
Způsob publikování: Omezený přístup
https://link.springer.com/article/10.1007/s12649-022-02021-3

Red mud is a by-product of the production of alumina from bauxite ore. However, less than 2% of red mud produced is currently utilized. Red mud contains a number of residual scarce metals including rare earth elements, some at a considerable concentration, so synchronous cultures of the red microalga Galdieria sulphuraria were tested for their ability to grow in red mud-containing medium and accumulate these rare earth elements from the mud. Red mud was added to the growth medium as an acid extract (in 10% v/v HNO3). Pigment content and photosynthetic performance are indicators of physiological condition and stress levels in microalgae. Growth of the treated culture was suppressed compared to an untreated control and the content of chlorophyll a and phycocyanin decreased while carotenoids increased substantially. Photosynthetic performance, determined as Fv/Fm, was almost unaffected by the red mud treatment. The concentration of individual rare earth elements in the red mud extract and the biomass, was determined using ICP-MS. The most accumulated rare earth elements were Ce, Nd, La, and Y (26, 15, 11 and 11 µg g−1 DM, respectively). G. sulphuraria was also cultivated under different trophic regimes, auto- and mixotrophically, with the addition of red mud extract. Growth of all cultures were comparable. The concentration of total accumulated rare earth elements was surprisingly high in mixotrophic G. sulphuraria (109 µg g−1 DM) but was tenfold lower in the autotrophic culture. Graphical Abstract: [Figure not available: see fulltext.].
Trvalý link: https://hdl.handle.net/11104/0345808