Abstract
Kinetic and equilibrium characteristics of the sorption of benzoic, salicylic and ortho-chlorobenzoic acids by a new cross-linked sorbent based on N-vinylpyrrolidone were studied at various pH values of the medium. It was found that the molecular sorption of aromatic carboxylic acids from aqueous solutions occurs in the mixed-diffusion mode and the sorption capacity of the polymer grows with increasing acid-base equilibrium constants of the acids. The advisability of introducing a salting-out agent into sorption systems was confirmed. Effective sorption systems and a method for concentration of aromatic carboxylic acids from aqueous solutions by the new cross-linked sorbent based on N-vinylpyrrolidone were suggested.
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Original Russian Text © A.A. Kushnir, P.T. Sukhanov, A.G. Savvina, L.P. Bondareva, E.V. Churilina, E.V. Poluzhenkova, G.V. Shatalov, 2016, published in Zhurnal Prikladnoi Khimii, 2016, Vol. 89, No. 6, pp. 730−735.
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Kushnir, A.A., Sukhanov, P.T., Savvina, A.G. et al. Sorption of aromatic acids from aqueous solutions by polymer based on N-vinylpyrrolidone. Russ J Appl Chem 89, 891–896 (2016). https://doi.org/10.1134/S1070427216060070
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DOI: https://doi.org/10.1134/S1070427216060070