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1

Sorption kinetics of heavy metal ions from multicomponent solutions on a chitosan sorbent

Kamiński W., Tomczak E., Jaros K.

Chemical and Process Engineering

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2007

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Vol. 28, z. 3

725-734

EN

The aim of this study was to determine and formulate equations describing the sorption kinetics of copper(II), chromium(VI) and zinc(II) ions in a glass column filled with chitosan beads in water solutions. The sorption efficiency of single ions and ions in mixtures has been analysed.

PL

Głównym celem pracy było zbadanie i matematyczny opis kinetyki sorpcji jonów miedzi(II), cynku(II) i chromu(VI) w kolumnie wypełnionej kulkami wytworzonymi z chitozanu oraz określenie wpływu obecności jonów w mieszaninie wieloskładnikowej na efektywność sorpcji danego jonu.

2

Usuwanie jonów miedzi z wody w kolumnie z wypełnieniem w postaci kulek chitozanowych

Jaros K., Kamiński W.

Chemia i Inżynieria Ekologiczna

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2006

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Vol. 13, nr S1

137-146

PL

Analizowano zagadnienie usuwania jonów miedzi z wody w kolumnie z wypelnieniem w postaci kulek chitozanowych. Badania prowadzono w zakresie stężeń początkowych jonów miedzi od 0,07 do 0,50 g Cu2+/dm3 Porównywano efektywność sorpcyjną na wytworzonych kulkach chitozanowych niesieciowanych oraz sieciowanych aldehydem glutarowym. Stwierdzono, że sorpcja jonów miedzi przebiega znacznie lepiej na kulkach niesieciowanych w porównaniu do tych sieciowanych aldehydem glutarowym. Stopień zatrzymania jonów wzrasta w miarę zwiększania czasu przebywania kulek w wodzie. Do opisu krzywych równowagowych sorpcji jonów miedzi zastosowano modele Langmuira i Freundlicha. Zmiany stężenia jonów w czasie opisano równaniem drugiego rzędu. Zgodność obliczeń z wartościami doświadczalnymi sprawdzono, korzystając ze współczynnika korelacji, który wahal się w granicach 0,91+0,99.

EN

Removal of carrer ions from water in the column with packing composed of chitosan be-ads is presented. Experiments were carried out at initial concentration of carrer ions ran-ging from 0.07 to 0.50 g Cu2+/dm3. Sorptivity on chitosan beads not crosslinked and crosslinked with glutaraldehyde was compared. On the basis of the research it was found that the sorption of carrer ions was much better on the not crosslinked beads as compared to the beads crosslinked with glutaraldehyde. The jon hold-up increased with an increase of the limf of beads keeping in the water. The Langmuir and Freundlich models were applied to describe the adsorption isotherms. The kinetics of carrer ions sorption was described by the secondorder equation. Consistency of calculations with experimental data was verified using the correlation coefficient, which ranged from 0.91 to 0.99.

3

The application of structural foam membranes in heavy metal ion removal from drinking water

Nowak U., Kamiński W., Albińska J., Jaros K.

Environment Protection Engineering

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2005

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Vol. 31, nr 3-4

99-108

EN

Heavy metals directly influence every living organism and are one of the most dangerous water pollutants. Therefore, even a very low concentration of heavy metals, of the ppm order of magnitude, can be dangerous. The standard methods of heavy metal ion removal have not always allowed us to remove these ions from drinking water completely. In search of a new method, the application of structural polymer membrane to heavy metal ion removal from drinking water is presented. To prepare this membrane in the form of porous structures, a natural polymer - chitosan - was used. It was chosen because of its complexing properties determined by the location of hydroxyl and amino groups. The structural membrane was used as packing in the adsorption column, where heavy metal ions were removed. Different heavy metal ions were examined both separately and in ion mixtures. Additionally, various operating conditions were studied during the experiments.

4

Removal of heavy metal ions: copper, zinc and chromium from water on chitosan beads

Jaros K., Kamiński W., Albińska J., Nowak U.

Environment Protection Engineering

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2005

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Vol. 31, nr 3-4

153-162

EN

The paper deals with the application of chitosan in the form of beads to the removal of copper, zinc and chromium ions from water. The main element of the experimental equipment was a glass column, 5 cm in diameter and 30 cm high. The column was filled with chitosan beads. The research was car-ried out in one-, two- and three-component solutions, at the initial concentrations c0 ranging from 50 to 70 mg/dm3.In the description of metal sorption kinetics, the second-order equation was used. It well describes experimental data (its correlation coefficient ranged from 0.94 to 0.99).

5

Zastosowanie chitozanu do usuwania jonów miedzi z wody

Jaros K., Kamiński W.

Inżynieria i Aparatura Chemiczna

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2004

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Nr 3s

68-69

EN

The application of chitosan beads for the removal of copper ions from water is presented in the paper. The efficiency of sorption with glutaraldehyde on the either crosslinked or not beads arranged in the mass or on the surface is compared. Sorption kinetics of copper ions is presented.