The DOM was fractionated into hydrophobic or hydrophilic neutrals, acids, and bases. The unfractionated DOM, the hydrophobic acids and neutrals (HoA and HoN, respectively), and the hydrophilic neutrals (HiN) fractions were studied using solid-state 13C-NMR, FTIR, and DRIFT spectroscopy. The HoA...
(DOC) and nitrogen (DON) were measured three times during decomposition: 1) in the early stages, 2) after the mass loss reached 20-30 % and 3) when the mass loss reached 30-40 %.The leaching of DOC hydrophilic neutrals and bases, regarded easily degradable, decreased during decomposition...
The degradability of different compound groups of DOC and DON was studied in a short-term incubation (20聽d) of DOM solutions by characterizing the solutions initially and after the incubation. Almost all compound groups appeared to degrade but weak hydrophobic acids, bases, hydrophilic neutrals, ...
FZI quantified substituted aromatic carbon and amino acids in major EOM fractions. A rank order from high to low in terms of unit total EEM integration (DT) was observed: hydrophobic neutrals (HPO-N) > hydrophobic acids (HPO-A) > hydrophobic bases (HPO-B) > hydrophilic acids (HPI-A) >...