The contribution of humic substances to the acidity of colored natural waters

Details The contribution of humic substances to the acidity of colored natural waters The contribution of humic substances to the acidity of colored natural waters

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.2031o&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 47, Issue 11, pp.2031-2035

Physics

17

Scientific paper

An operationally defined carboxyl content of humic substances extracted from rivers, streams, lakes, wetlands, and groundwaters throughout the United States and Canada is reported. Despite the diversity of the samples, only small variations were observed in this humic carboxyl content. The dissociation behavior of two combined fulvic/humic acid extracts was studied and it was found that the dissociation of the humics varied in a predictable manner with pH. Using a carboxyl content of 10 eq/ mg humic organic carbon, and mass action quotient calculated from sample pH, the ionic balances of three highly colored Nova Scotia rivers were estimated.

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