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Thermodynamics of the Process of Adsorption of Phosphate Starch on Cellulose
Author(s) -
Nedelcheva M.,
Sokolova J.
Publication year - 1988
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19880400107
Subject(s) - adsorption , chemistry , cellulose , starch , phosphate , desorption , pulp (tooth) , langmuir adsorption model , thermodynamics , langmuir , entropy (arrow of time) , chemical engineering , organic chemistry , medicine , physics , pathology , engineering
Subject of this study is the adsorption of phosphate starch (PHS) on cotton cellulose and unbleached pulp from coniferous wood at temperature of 0.20, 40 and 60°C. resp., and concentration of the PHS solutions ranging from 0,030 to 2,00 g/l. It was found that with an increase of temperature the quantity of adsorbed PHS decreases. Adsorption equilibrium is described by the adsorption isotherm of Langmuir . The equilibrium constants, isosteric heats, standard affinity and entropy of the process are defined. It was established that the desorption of PHS of sulphate unbleached pulp of coniferous wood was 46.5%.