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Wyszukujesz frazę "Jóźwiak, Tomasz" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Use of sawdust immobilised on chitosan for disposal of dyes from water solutions
Autorzy:
Szymczyk, Paula
Filipkowska, Urszula
Jóźwiak, Tomasz
Kuczajowska-Zadrożna, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1034629.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
Basic Violet 10
Reactive Black 5
chitosan
immobilisation
sawdust
sorption
Opis:
In this article, the sorption properties of chitosan hydrogel beads, beech sawdust and sawdust immobilised on chitosan in relation to Reactive Black 5 (RB5) and Basic Violet 10 (BV10) dyes were compared. In the conducted research, the sorption capacities of the sorbents, sorption pH and the point of zero charge (pHZPC) were determined. For the description of the obtained results, the double Langmuir model has been used. The highest effectiveness of the cationic and anionic dye removal on chitosan hydrogel beads and sawdust immobilised on chitosan was obtained at pH 4, whereas on sawdust, the pH was 3. The best sorbent in relation to the RB5 dye was obtained using chitosan hydrogel beads, and in relation to BV10, it was sawdust. The maximum sorption capacity of chitosan in relation to RB5 was 875.66 mg/g, whereas the sorption capacity of sawdust in relation to BV10 was 30.15 mg/g. The research has shown that the sorbent in the form of sawdust immobilised on chitosan had a high sorption capacity in relation to anionic as well as cationic dyes. Immobilisation of sawdust on chitosan led to the creation of a universal sorbent in relation to cationic and anionic dyes.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 207-219
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of dyes from aqueous solutions by glauconite immobilised on chitosan hydrogel beads
Autorzy:
Jóźwiak, Tomasz
Filipkowska, Urszula
Szymczyk, Paula
Kuczajowska-Zadrożna, Małgorzata
Mielcarek, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1034580.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
Basic Violet 10
Reactive Black 5
chitosan
glauconite
hydrogel beads
immobilisation
sorption
Opis:
The sorption capacity of glauconite, glauconite immobilised on chitosan hydrogel beads and unmodified chitosan hydrogel beads against Reactive Black 5 and Basic Violet 10 was compared in this article. The effect of pH on the sorption effectiveness of dyes on the tested sorbents was investigated and the sorption capacity of sorbents after 24 and 72 h was determined. Langmuir sorption, double Langmuir and Freundlich isotherms were used to describe the experimental data. The adsorption efficiency of the dyes on sorbents containing chitosan was highest at pH 4. In the case of glauconite, Reactive Black 5 removal efficiency was the highest at pH 3, and Basic Violet 10 removal efficiency was highest at pH 2. The sorption capacity of glauconite immobilised on chitosan hydrogel spheres obtained after 72 h was -656.73 mg/g and -32.77 mg/g for Reactive Black 5 and Basic Violet 10, respectively.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 54-65
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of chitosan deacetylation degree on reactive black 5 sorption efficiency from aqueous solutions
Autorzy:
Jóźwiak, Tomasz
Filipkowska, Urszula
Szymczyk, Paula
Kuczajowska-Zadrożna, Małgorzata
Mielcarek, Artur
Zyśk, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1034679.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
Reactive Black 5
chitosan
deacetylation degree
sorption
Opis:
In the paper sorption capacity of chitosan having a deacetylation degree DD=75%, DD=85% and DD=90% relatively to the Reactive Black 5 were compared. Studies on the effectiveness of the dye sorption were carried out in a wide pH range – from 3 to 11. For each of the tested chitosan sorbents, sorption capacity has been determined. The results were described by isotherms Freundlich and Lagmuir isotherms, and a double Langmuir isotherm. Sorption of Reactive Black 5 most efficiently occurred at pH 4. At pH <4 chitosan sorbents underwent dissolution, regardless of the degree of deacetylation. The efficiency of dye sorption increased with the degree of deacetylation. The sorption capacity calculated after 12 h of the chitosan sorption with DD=75%, DD=85% and DD =90% was, relatively to the Reactive Black 5, respectively 433.03 mg/g and 464.52 mg/g and 532.14 mg/g. The impact of the deacetylation degree on pHZPC (zero point of charge) of the sorbent was also examined. Along with the increase in the deacetylation degree the value of chitosan pHZPC increased as well and at DD=75% DD=85% and DD=90%, pHZPC amounted respectively 7.6, 7.7 and 7.8.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 83-92
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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