Abstract:
:Indulin AT biodegradation by basidiomycetous fungi, actinobacteria and commercial laccases was evaluated using a suite of chemical analysis methods. The extent of microbial degradation was confirmed by novel thermal carbon analysis (TCA), as the treatments altered the carbon desorption and pyrolysis temperature profiles in supernatants. Laccase treatments caused only minor changes, though with increases occurring in the 850°C and char precursor fractions. After fungal treatments, lignin showed a similar change in the TCA profile, along with a gradual decrease of the total carbon, signifying lignin mineralization (combined with polymerization). By contrast, bacteria produced phenolic monomers without their further catabolism. After 54days of cultivation, a 20wt% weight loss was observed only for fungi, Coriolus versicolor, corroborating the near-80% carbon mass balance closure obtained by TCA. Compositional changes in lignin as a result of biodegradation were confirmed by thermal desorption (TD)-pyrolysis-GC-MS validating the carbon fractionation obtained by TCA.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Asina F,Brzonova I,Voeller K,Kozliak E,Kubátová A,Yao B,Ji Ydoi
10.1016/j.biortech.2016.08.016subject
Has Abstractpub_date
2016-11-01 00:00:00pages
414-424eissn
0960-8524issn
1873-2976pii
S0960-8524(16)31137-3journal_volume
220pub_type
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