Browsing by Author "Racheva R."

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    Immobilization of trichosporon cutaneum R57 on PVA/TEOS/ MPTEOS hybrid matrices for removal of manganese ions
    (2013-10-17) Georgieva N.; Bryaskova R.; Lazarova N.; Racheva R.
    New hybrid materials based on polyvinyl alcohol (PVA), 3-mercaptopropyltriethoxysilane (MPTEOS) and tetraethoxysilane (TEOS) were prepared, using a sol-gel process. Thermogravimetric analysis (TGA) was performed to determine the thermal stability of the hybrid materials. MPTEOS, as a precursor, ensured the presence of SH-groups, thus providing additional binding places for cell immobilization. Based on good adhesive behavior, the hybrid materials were tested as matrices for immobilization of Trichosporon cutaneum R57 for removal of manganese ions from aqueous solutions. Maximum Mn2+ removal was achieved by cells immobilized onto materials with higher MPTEOS concentration. The synthesized PVA/TEOS/MPTEOS hybrid materials proved to be efficient for use in biosorption applications. © Biotechnol. & Biotechnol. Eq.