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  • production of a robust nanobiocatalyst for municipal wastewater treatment

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 793
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    • شماره تماس دبیرخانه رویداد: -
     immobilization is a fundamental method to improve both enzyme activity and stability. in the present work, the process previously described for immobilizing laccase – an enzyme oxidizing phenolic compounds – onto fumed silica was optimized, in order to efficiently produce industrially relevant amounts of a nanobiocatalyst for biological micropollutant elimination, whilst saving 80% of surface modification agent (3-aminopropyl triethoxy silane) and 90% of cross-linker (glutaraldehyde). minimized losses during preparation and favorable effects of immobilization yielded conjugates with drastically increased enzymatic activity (164% of invested activity). long-term stability and activity regarding bisphenol a (2,2-bis(4-hydroxyphenyl)propane) removal of the synthesized biocatalyst were assessed under application-relevant conditions. with 81.1 ± 0.4% residual activity after 7 days, stability of conjugates was drastically higher than of free laccase, which showed virtually no activity after 1.5 days.

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