Abstract:
Fluorescence excitation-emission matrix (EEM) spectroscopy coupled with parallel factor analysis (PARAFAC)
enables better understanding of the nature of dissolved organic matter (DOM). In the current study, we characterized
10 biochar samples produced from different feedstocks using EEM/PARAFAC analysis. The composition
and distribution of DOM substances present in biochar varied significantly according to feedstock, activation,
and pyrolysis temperature. The integration of proximate and ultimate analyses of the solid phase together
with water extractable organic matter (WEOM) phase of biochar provided new insights into the characterization
of biochars, including nature and functionality. Characterization of both WEOM and solid phases is recommended
for biochar research before large-scale production for various environmental and industrial applications.
