Institutul de Genetică, Fiziologie şi Protecţie a Plantelor

Permanent URI for this communityhttps://msuir.usm.md/handle/123456789/13417

Browse

Subject: search.filters.subject.heavy metals

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Biotechnological valorization of Arthrospira plantensis for heavy metal and rare earth element recovery from multimetallic effluents [Articol]
    (Editura USM, 2025) Cepoi, Liliana; Chiriac, Tatiana; Rudi, Ludmila; Zinicovscaia, Inga
    This study aimed to evaluate the bioaccumulation capacity of the cyanobacterium Arthrospira platensis for heavy metals and rare earth elements (REEs) from mono- and polymetallic effluents. Experimental systems were enriched with metals such as Ni, Cu, Zn, Cr, Fe, Sr, Mo, and REEs (Dy, La, Tb, Nd, Sm, Yb) at various concentrations. Metal accumulation in biomass was quantified using neutron activation analysis analysis. Biomass productivity was assessed spectrophotometrically based on a calibration curve, while oxidative stress was evaluated via malondialdehyde (MDA) content using the TBARS assay. Results demonstrated high accumulation capacities, with notable values for Cu (2870 mg/kg), Zn (up to 22500 mg/kg), Ni (1310 mg/kg), and La (>90% recovery). Biomass growth and MDA levels varied depending on the metal combination and concentration, indicating stress responses. A. platensis showed consistent resilience and was effective as a biosorbent, especially under moderate oxidative stress. The findings highlight its applicability in the bioremediation of wastewater containing diverse metal contaminants and its potential use as a matrix for biofortified supplements.
  • Thumbnail Image
    Item
    Detection of heavy metals in soil to determine phosphorus and potassium levels
    (CEP USM, 2024-10-07) Holomb, Lyudmila; Vakerych, Mykhailo; Hasynets, Yaroslava; Schwartau, Victor
    The presence of heavy metals in the soil can significantly affect the formation of available levels of the main macronutrients, in particular, phosphorus and potassium. This dependence is used in modern technologies for determining the content of phosphorus and potassium in soils, for example, based on the rapid determination of gamma irradiation of K40, U238, Th232, Cs237. These interactions are influenced by several factors, including soil properties, heavy metal concentrations, and plant species. Understanding these interactions is essential for effective soil management, environmental protection, and increasing the productivity of agrophytocenoses. The use of these technologies enables the development of highly sensitive methods for rapid assessment of phosphorus and potassium in soils and for regular soil monitoring to mitigate the negative effects of heavy metals in agrophytocenoses and to ensure balanced nutrient availability for plants.