Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.jcis.2010.05.031
Titel (primär) Laccase-modified silica nanoparticles efficiently catalyze the transformation of phenolic compounds
Autor Galliker, P.; Hommes, G.; Schlosser, D. ORCID logo ; Corvini, P.F.-X.; Shahgaldian, P.
Quelle Journal of Colloid and Interface Science
Erscheinungsjahr 2010
Department UMB
Band/Volume 349
Heft 1
Seite von 98
Seite bis 105
Sprache englisch
Keywords Laccase; Silica; Nanoparticle; Bisphenol A; Endocrine disrupting chemical; Radioactivity
Abstract A new system based on laccase-modified silica nanoparticles has been developed and tested for its ability to degrade a major endocrine disrupting chemical, 4,4'-isopropylidenediphenol (bisphenol A). The nanoparticles have been produced using the Stöber method and characterized using scanning electron microscopy, dynamic light scattering and ?-potential measurements. The introduction of primary amino groups at the surface of these particles has been achieved using an organo-silane (amino-propyl-triethoxy-silane). The use of glutaraldehyde as bi-functional coupling agent allowed the efficient conjugation of a laccase from Coriolopsis polyzona at the surface of the nanoparticles, as monitored by measuring the amount of proteins coupled and the ?-potential of the produced nanoparticles. The oxidative activity of the so-produced bio-conjugate was tested using radioactive-(14C) labeled bisphenol A. Analytical methods based on high performance liquid chromatography coupled to mass spectrometry and gas chromatography allowing a convenient and reliable study of the enzymatic activity of the produced bio-conjugates have been developed. It is demonstrated that even if a decrease of the specific catalytic activity of the immobilized enzyme is measured, the activity of the bio-conjugate remains compatible with the application of these systems to the transformation of phenolic pollutants. Additionally, the developed analytical methods allowed the identification of the transformation products formed during the enzymatic reaction.
dauerhafte UFZ-Verlinkung
Galliker, P., Hommes, G., Schlosser, D., Corvini, P.F.-X., Shahgaldian, P. (2010):
Laccase-modified silica nanoparticles efficiently catalyze the transformation of phenolic compounds
J. Colloid Interface Sci. 349 (1), 98 - 105 10.1016/j.jcis.2010.05.031