Papers by Dorota Kołodyńska
Journal of the Serbian Chemical Society, 2003
Bookmarks Related papers MentionsView impact
Journal of Environmental Management, 2022
Bookmarks Related papers MentionsView impact
Polyhedron
Bookmarks Related papers MentionsView impact
Surface and Coatings Technology, 2020
Bookmarks Related papers MentionsView impact
Physicochemical Problems of Mineral Processing, 2022
Bookmarks Related papers MentionsView impact
Hydrometallurgy, 1998
Bookmarks Related papers MentionsView impact
Chemical Engineering Journal, 2022
Bookmarks Related papers MentionsView impact
Journal of Environmental Management, 2022
In this study the iron oxide ion exchanger with the quaternary ammonium groups, Ferrix A33E was m... more In this study the iron oxide ion exchanger with the quaternary ammonium groups, Ferrix A33E was modified with neodymium (III) ions in order to obtain the new material Ferrix A33E-Nd(III) characterized by greater sorption efficiency of arsenate(V) ions. A33E-Nd(III) was described by various techniques including scanning electron microscopy SEM, nitrogen adsorption/desorption isotherms, Fourier transform infrared spectroscopy FTIR and X-ray photoelectron spectroscopy XPS. The point of zero charge, pHPZC was also determined. The kinetic and thermodynamic parameters of the arsenate(V) sorption were calculated. The experimental data was fitted to the four isotherm models - Langmuir, Freundlich, Dubinin-Radushkevich and Halsey. Kinetic and equilibrium studies allowed to get to know the behaviour of arsenate(V) ions during the sorption on A33E-Nd(III). The obtained material A33E-Nd(III)- was found to possess a larger maximum sorption capacity than A33E, great stability and the possibility of regeneration at least 3 times without a significant decrease in efficiency. This allows for the complete removal of As(V) ions from a solution with a concentration of 50 mg/dm3 in just 30 min. The Nd(III)-modification improved the sorption properties of the tested ion exchanger.
Bookmarks Related papers MentionsView impact
International Journal of Biological Macromolecules, 2021
A new type of functional lignin-based spherical particles (L-CTAB) prepared with the use of hexad... more A new type of functional lignin-based spherical particles (L-CTAB) prepared with the use of hexadecyltrimethylammonium bromide (CTAB) was applied as an effective biosorbent for removing vanadium(V) ions. The porous structure, characteristic functional groups, electrokinetic stability, morphology and size of the L-CTAB particles were examined. The conditions of removal were also investigated, including pH (2-12), sorbent mass (0.1-0.5 g), concentration (10-100 mg/dm3), phase contact time (1-240 min) and temperature (293-333 K). At pH 5.0 the maximum sorption percentage (%S) of V(V) was 45%, while at pH 2.0 it was 32%. The maximum sorption capacity of V(V) for L-CTAB was found to be 10.79 mg/g. The kinetic data indicate that the sorption followed the pseudo-second-order and film diffusion models. Sorption equilibrium for V(V) ions removal by L-CTAB was reached after 60 min at the initial concentrations 10 and 50 mg/dm3. It has been shown that the adsorption of V(V) ions on the surface of L-CTAB is a heterogeneous, endothermic and spontaneous reaction, as evidenced by the calculated values of thermodynamic parameters - free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) - for the tested systems at different temperatures. HCl solutions, used as an L-CTAB regeneration agent, quantitatively eluted V(V) ions.
Bookmarks Related papers MentionsView impact
Hydrometallurgy, 1999
Bookmarks Related papers MentionsView impact
Journal of Molecular Liquids, 2020
Abstract A new commercial sorbent ADSORBSIA™ As500 was used for As(V) and Cr(VI) removal as well ... more Abstract A new commercial sorbent ADSORBSIA™ As500 was used for As(V) and Cr(VI) removal as well as La(III) and Nd(III) recovery from aqueous solutions. The physicochemical properties were characterized by nitrogen adsorption/desorption analyses, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The adsorption kinetics of ADSORBSIA™ As500 was analysed using the reaction and diffusion base models such as the pseudo-first order, pseudo-second order, intraparticle diffusion, and Dumwald-Wagner. The effect of different pH values, dose, initial concentrations and the type of metal ions on the adsorption capacity was analysed. As for adsorption data, the Langmuir, Freundlich and Temkin models were used. Desorption of adsorbed metal ions from ADSORBSIA™ As500 was not studied. The sorption equilibrium was established within 60 min. The maximum amount of metals (qe) adsorbed at equilibrium was 37.98, 15.91, 24.77 and 22.23 mg/g for As(V), Cr(VI), La(III) and Nd(III), respectively, which can be arranged in the following selectivity order: As(V) > La(III) > Nd(III) > Cr(VI). The sorption capacities were found to be pH, time, concentration and sorbent dose dependent. The equilibrium data were well described by the Langmuir adsorption isotherm, but the kinetic data were fitted by the pseudo-second order model.
Bookmarks Related papers MentionsView impact
Chemical Engineering Journal, 2020
Bookmarks Related papers MentionsView impact
Separation Science and Technology, 2017
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Expanding Issues in Desalination, 2011
Bookmarks Related papers MentionsView impact
Separation Science and Technology, 2019
Bookmarks Related papers MentionsView impact
Nanoscale Research Letters, 2018
Bookmarks Related papers MentionsView impact
Adsorption, 2019
Bookmarks Related papers MentionsView impact
Journal of Rare Earths, 2018
Bookmarks Related papers MentionsView impact
Nanoscale Research Letters, 2017
Bookmarks Related papers MentionsView impact
Uploads
Papers by Dorota Kołodyńska