Some precursors of humic acid in Recent lake sediment suggested by infra-red spectra

Details Some precursors of humic acid in Recent lake sediment suggested by infra-red spectra Some precursors of humic acid in Recent lake sediment suggested by infra-red spectra

Sep 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.1505o&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 31, Issue 9, pp.1505-1515

Physics

1

Scientific paper

Humic substances in lake sediment can be both autochthonous, derived from the biota of the lake itself, and allochthonous, derived from the biota and soil of the drainage area. The i.r. spectrum of humic acid from the upper 15 cm of sediment in the center of Lake Haruna in central Japan differs significantly from the spectra of humic acid from soil near the lake, but closely resembles the spectra of some dried lacustrine organisms. Thus, the probable precursors of the humic acid are the organisms in the lake, and the humic substances in the sediment are mainly autochthonous. This conclusion is supported by the fact that no streams flow into the lake that might contribute allochthonous substances to the sediment.

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