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Humic-like acids (HLA0, HLA70, HLA130, HLA730) were extracted from composts obtained from sewage sludges and trimmings after 0, 70, 130 and 730 days of composting, respectively. In addition, HLA130 was fractionated using SEC-PAGE set-up. Fluorescence spectroscopy revealed that HLA0 was the only sample to contain emission bands characteristic of protein-like compounds (λexc/λem: 280/350) and chlorophyll...
Humic and fulvic acids extracted from soils of different genesis were investigated for their ability to photoinduce the transformation of fenuron (2x10 -4 moll -1 ) at 365 nm. The ratio of the initial rate of fenuron consumption over the rate of light absorption by humic substances was found to be higher for fulvic acids (range 2.0x10 -3 to9.0x10 -5...
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