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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pawlaczyk, Mateusz
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Publications (4/4 displayed)
- 2021The Electrospray (ESI) and Flowing Atmosphere-Pressure Afterglow (FAPA) Mass Spectrometry Studies of Nitrophenols (Plant Growth Stimulants) Removed Using Strong Base-Functionalized Materialscitations
- 2020Efficient Removal of Ni(II) and Co(II) Ions from Aqueous Solutions Using Silica-based Hybrid Materials Functionalized with PAMAM Dendrimerscitations
- 2019Silica-dendrimer nanohybrid materials as adsorbents for heavy metal ions in aqueous solutions
- 2019Adsorption studies of Cu(II) ions on dendrimer-grafted silica-based materialscitations
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document
Silica-dendrimer nanohybrid materials as adsorbents for heavy metal ions in aqueous solutions
Abstract
<p>Global industrialization generates still growing water contamination, connected with appearance of primarily heavy metal ions and toxic organic compounds. Therefore, designing and synthesis of novel adsorbents is highly explored part of materials science. In the recent years, a broad range of inorganic-organic hybrid materials drew attention as potential sorbents designated for heavy metal removal, according to their versatile usefulness and flexible modulation of chelating properties by the choice of functionalizing agent. The main objective of following study was to synthesize a series of poly(amidoamine) dendrimers with tris(2-aminoethyl)amine as amine core, which constituted the grafting nanoagents for silica surface, leading to novel hybrid materials designated as adsorbents toward heavy metal ions: Cu<sup>2+</sup>, Ni<sup>2+</sup> and Co<sup>2+</sup>. The synthetic approach involved synthesis of four dendrimers containing structurally diverse amines: ethylenediamine, triethylenetetramine, tris(2-aminoethyl)amine and 4,7,10-trioxa-1,13-tridecanediamine and their subsequent grafting onto isocyanate-functionalized silica particles. Synthesized dendrimers were characterized with NMR and ESI-MS analysis, while successful grafting of dendrimers onto silica surface was confirmed by IR spectroscopy. Obtained hybrid materials, containing nanosized dendrimers on their surface, were studied for adsorptive properties toward heavy metal ions, including determination of adsorption isotherms, as well as performing kinetic and thermodynamic studies, using spectrophotometric assays. On the basis of adsorption experiments, various coefficients such as maximal adsorption capacities, standard Gibbs free energies and adsorption rate constants were established, which values considerably varied for each material. According to obtained data, appearance of structurally diverse amines in grafting agents significantly influences the chelating properties of silica-based hybrid materials. Satisfactory results of conducted studies might contribute to designing of novel adsorbents, finding utilization in removal or pre-concentration of analytes, as well as in gradual sorption of bioactive molecules.</p>