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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).
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: 2024-02-05Bibliographically approved

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Ljunggren, Lennart

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