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Physicochemical approach to freshwater microalgae harvesting with magnetic particles
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SYSNO ASEP 0398932 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Physicochemical approach to freshwater microalgae harvesting with magnetic particles Tvůrce(i) Procházková, G. (CZ)
Podolová, N. (CZ)
Šafařík, Ivo (UEK-B) RID, SAI
Zachleder, Vilém (MBU-M) ORCID
Brányik, T. (CZ)Zdroj.dok. Colloids and Surfaces B-Biointerfaces. - : Elsevier - ISSN 0927-7765
Roč. 112, DEC 2013 (2013), s. 213-218Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova microalgae ; cell adhesion ; magnetic beads ; surface interactions ; XDLVO theory Vědní obor RIV EH - Ekologie - společenstva Vědní obor RIV – spolupráce Mikrobiologický ústav - Biotechnologie a bionika CEP GAP503/10/1270 GA ČR - Grantová agentura ČR Institucionální podpora RVO:67179843 - RVO:67179843 ; MBU-M - RVO:61388971 UT WOS 000328593100031 DOI 10.1016/j.colsurfb.2013.07.053 Anotace Magnetic harvesting of microalgal biomass provides an attractive alternative to conventional methods.The approach to this issue has so far been pragmatic, focused mainly on finding cheap magnetic agents incombination with harvestable microalgae species. The aim of this work was to study experimentally andtheoretically the mechanisms leading to cell-magnetic agent attachment/detachment using real experi-ments and predictions made by colloidal adhesion (XDLVO) model. Two types of well defined magneticbeads (MBs) carrying ion exchange functional groups (DEAE – diethylaminoethyl and PEI – polyethylen-imine) were studied in connection with microalgae (Chlorella vulgaris). Optimal harvesting efficiencies(>90%) were found for DEAE and PEI MBs, while efficient detachment was achieved only for DEAE MBs(>90%). These findings were in accordance with the predictions by XDLVO model. Simultaneously therewas found a discrepancy between the XDLVO prediction and the poor detachment of PEI MBs frommicroalgal surface. This can be ascribed to an additional interaction (probably covalent bonds) betweenPEI and algal surface, which the XDLVO model is unable to capture given by its non-covalent nature. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2014
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