Browsing by Author "Harja, Maria"

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  • Accumulation of Heavy Metal Ions from Urban Soil in Spontaneous Flora 
    Harja, Maria; Ciocinta, Ramona-Carla; Ondrasek, Gabrijel; Bucur, Daniel; Dirja, Marcel (MDPI, 2023-02-15)
    This study aimed to analyse the bioaccumulation of heavy metal ions in plants of spontaneous flora. An urban area was established from which soil samples were taken and analyses were performed on the content of heavy metal ...
  • Adsorption of direct green 6 dye onto modified power plant ASH 
    Harja, Maria; Kotova, Olga; Samuil, Costel; Ciocinta, Ramona-Carla; Ciobanu, Gabriela (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iaşi, 2017)
    Power plant ash and modified ash were used as the adsorbent, in this study, for the removal of textiledye direct green 6 (DG6) from aqueous solutions. The adsorbent was prepared by the alkaline attack in aqueous medium ...
  • Adsorption performance of modified fly ash for copper ion removal from aqueous solution 
    Buema, Gabriela; Harja, Maria; Lupu, Nicoleta; Chiriac, Horia; Forminte, Loredana; Ciobanu, Gabriela; Bucur, Daniel; Bucur, Roxana-Dana (MDPI, 2021-01-16)
    The initial characteristics of Romanian fly ash from the CET II Holboca power plant show the feasibility of its application for the production of a new material with applicability in environmental decontamination. The ...
  • Asymmetric cellulose acetate membranes used in separation applications 
    Ciobanu, Gabriela; Favier, Lidia; Harja, Maria ("Ion Ionescu de la Brad" University of Agricultural Sciences and Veterinary Medicine, Iași, 2021-03-31)
    This work focused on the use of cellulose acetate polymer for the preparation of porous asymmetric membranes using a phase inversion process. These membranes were characterised by scanning electron microscopy, a bubble-point ...
  • Fly ash magnetic adsorbent for cadmium ion removal from an aqueous solution 
    Buema, Gabriela; Lupu, Nicoleta; Chiriac, Horia; Herea, Dumitru-Daniel; Favier, Lidia; Ciobanu, Gabriela; Forminte, Loredana; Harja, Maria ("Ion Ionescu de la Brad" University of Agricultural Sciences and Veterinary Medicine, Iași, 2021-03-31)
    The fly ash generated from a Romanian power plant was used as a starting material in this study. The aim of the study was to obtain a low cost material based on the treatment of fly ash with Fe3O4 for utilization as ...
  • Intensification of the photodegradation efficiency of an emergent water pollutant through process conditions optimization by means of response surface methodology 
    Favier, Lidia; Simion, Andrei-Ionuț; Hlihor, Raluca-Maria; Fekete Kertesz, Ildiko; Molnar, Monika; Harja, Maria; Vial, Christophe (Elsevier, 2022-12-13)
    Heterogeneous photocatalysis has been increasingly investigated during the past years and has been recognized as a promising technique for clean and safe water purification. The current study exploits the advantage of this ...
  • Performance assessment of five adsorbents based on fly ash for removal of cadmium ions 
    Buema, Gabriela; Lupu, Nicoleta; Chiriac, Horia; Ciobanu, Gabriela; Bucur, Roxana-Dana; Bucur, Daniel; Favier, Lidia; Harja, Maria (Elsevier B.V., 2021-03-18)
    Five adsorbents based on fly ash treated with NaOH for the adsorption of cadmium ion from aqueous solutions were investigated. The materials were characterized using scanning electron microscopy (SEM), Fourier trans form ...
  • Recent advances in removal of Congo Red dye by adsorption using an industrial waste 
    Harja, Maria; Buema, Gabriela; Bucur, Daniel (Springer Nature, 2022-04-12)
    The Congo Red dye was removed from a simulated textile wastewater solution using fly ash from a local power plant. The characterisation of fly ash was studied in detail by SEM, EDX, XRD, FTIR, BET surface area and TGA ...
  • Zeolites from power plant ash for waste water treatment 
    Harja, Maria; Guriță, Ana-Andreea; Bărbuță, Marinela; Ciocinta, Ramona-Carla (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iaşi, 2011)
    The capitalisation of ash from power plant for obtaining zeolites is very interesting, because obtained products have high environmental applications. Zeolites may be easily obtained from ash by direct alkaline conversion ...