The influence of salinity on reactive black 5 dye sorption efficiency on hydrogel chitosan sorbents

Szczegóły
Opis

Tytuł:: The influence of salinity on reactive black 5 dye sorption efficiency on hydrogel chitosan sorbents
Autorzy:: Jóźwiak, Tomasz
Filipkowska, Urszula
Bolozan, Ludmila
Gache, Luminita
Powiązania:: https://bibliotekanauki.pl/articles/1034231.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: Na2SO4
NaCl
RB5 dye
chitosan
salinity
sorption
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2019, 24; 49-60
1896-5644
Język:: angielski
Prawa:: Wszystkie prawa zastrzeżone. Swoboda użytkownika ograniczona do ustawowego zakresu dozwolonego użytku
Dostawca treści:: Biblioteka Nauki
: Artykuł

Przejdź do źródła

This study examined the effect of salt concentration (NaCl/Na2SO4) on the sorption efficiency of Reactive Black 5 (RB5) dye on chitosan hydrogel granules (CHs). The tested salt concentration was in the range of 0.0 to 0.5 mol/L. The scope of the research included the effect of salinity on RB5 sorption at different pH values (4–11), equilibrium time, and maximum sorption capacity (Langmuir 2 model). At low pH (pH 4, pHpHPZC), an opposite trend was observed (the sorption efficiency of RB5 on CHs increased with increasing salinity). The concentration of salt in the solution did not have a major impact on the equilibrium time of sorption, which depended mainly on the initial pH of the solution (and ranged from 36 to 60 h). The relatively long sorption time resulted from the hydrogel structure of the sorbent used, which slowed the dye absorption ability. The maximum sorption capacity of CHs in relation to RB5 at the optimum pH (pH 4) in the solution without the addition of salt determined after 60 h of sorption was 1.386 mmol RB5/g (1373.5 mg RB5/g). Under conditions of high salinity (0.5 mol Na2SO4/L), at pH 4, the capacity was 17.2% lower (1.148 mmol RB5/g to 1139.7 mg RB5/g), and at pH 11, it was 6.3% higher (1.474 mmol RB5/g to 1460.7 mg RB5/g).

Informacja

Powiązane pozycje