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Sorption properties of a modified powdered cocoa beverage

100%
Kowalska J., Majewska E., Lenart A.
Chemical and Process Engineering
|
2011
|
vol. 32
|
issue 1
21-31
EN
The purpose of the study was to analyse the effect of changes in the composition of raw material and agglomeration on sorption properties of a multi-component food, in the example of a powdered cocoa beverage. The basic composition of the mixtures was 20% of cocoa and 80% of sucrose. A change in raw material composition involved partial or total replacement of sucrose with a mixture of glucose and fructose, or with maltodextrin. Analysis of sorption properties demonstrated variability in the course of isotherms of water vapour sorption for components of the powdered cocoa beverage. Limiting water activity (aw) was determined for the value of 0.529. The conducted analysis detected no significant effect of agglomeration on water content in the tested products. However, a significant change in the raw material composition was demonstrated.
2
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Adsorptive removal of cochineal red a dye from aqueous solutions using yeast

88%
Borysiak M., Gabruś E., Borysiak M., Gabruś E.
Chemical and Process Engineering
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2020
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vol. 41
|
issue 2
3
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Adsorption of Zn(II) ions from aqueous environment by surface modified Strychnos potatorum seeds, a low cost adsorbent

88%
Kumar P. S.
Polish Journal of Chemical Technology
|
2013
|
vol. 15
|
issue 3
35-41
EN
The surface modified Strychnos potatorum seeds (SMSP), an agricultural waste has been developed into an effective adsorbent for the removal of Zn(II) ions from aqueous environment. The Freundlich model provided a better fit with the experimental data than the Langmuir model as revealed by a high coefficient of determination values and low error values. The kinetics data fitted well into the pseudo-second order model with the coefficient of determination values greater than 0.99. The influence of particle diffusion and film diffusion in the adsorption process was tested by fitting the experimental data with intraparticle diffusion, Boyd kinetic and Shrinking core models. Desorption experiments were conducted to explore the feasibility of regenerating the spent adsorbent and the adsorbed Zn(II) ions from spent SMSP was desorbed using 0.3 M HCl with the efficiency of 93.58%. The results of the present study indicates that the SMSP can be successfully employed for the removal of Zn(II) ions from aqueous environment.
4
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Sorption properties of a modified powdered cocoa beverage

88%
Kowalska J., Majewska E., Lenart A.
Chemical and Process Engineering
|
2011
|
issue 1
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