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Flow permeable composites of lignin and poly(vinyl alcohol): Towards removal of bisphenol A and erythromycin from water
Malmö högskola, Faculty of Health and Society (HS), Department of Biomedical Science (BMV).
CR Competence AB, Box 124, Lund, SE-22100, Sweden.
Malmö högskola, Faculty of Health and Society (HS), Department of Biomedical Science (BMV).
2016 (English)In: Journal of Environmental Chemical Engineering, E-ISSN 2213-3437, Vol. 4, no 2, p. 1432-1441Article in journal (Refereed)
Abstract [en]

Monolithic composites of Polyphepan (R) or Kraft lignin embedded in a poly(vinyl alcohol) (PVA) matrix were synthesized using cryogelation technique and studied as flow permeable adsorbents for bisphenol A and erythromycin removal from water. Adsorption isotherms of bisphenol A on pristine Polyphepan provided the equilibrium dissociation constant K-L = 2.6 x 10 (6) M and the maximal binding capacity Q(max) = 20 mu mol/g; for erythromycin K-L was in the 9.6 x 10 (6) M to 5.8 x 10 (5) M range, and Q(max) was between 55 mu mol/g and 94 mu mol/g. Embedment of lignins into PVA cryogels resulted in monoliths with adequate flow permeability and the composites essentially retained the binding capacity for both bisphenol A and erythromycin. Percolation of contaminated water through the monoliths resulted in 10-fold reduction of the pollutant concentrations within 12-70 column volumes of the effluent. Due to the higher loading of lignin, the Kraft lignin-PVA composite showed higher adsorption capacity for erythromycin than Polyphepan-PVA. Stability and reversible compression of the monoliths in the flow of water were studied. Limitations are associated with leakage of soluble lignin, strongly expressed in the case of Kraft lignin-containing composites. (C) 2016 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 4, no 2, p. 1432-1441
Keywords [en]
Adsorption, Convection, Cryogel, Lignin, Pollutant
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mau:diva-4515DOI: 10.1016/j.jece.2016.02.026ISI: 000391696100004Scopus ID: 2-s2.0-84959477473Local ID: 25957OAI: oai:DiVA.org:mau-4515DiVA, id: diva2:1401346
Available from: 2020-02-28 Created: 2020-02-28 Last updated: 2024-06-17Bibliographically approved

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Ljunggren, Lennart

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