||Reduction of Ionic Species by Fulvic Acid.
Skogerboe, R. K. ;
Wilson, S. A. ;
||Colorado State Univ., Fort Collins. Dept. of Chemistry.;Environmental Research Lab., Athens, GA.
Fulvic acid ;
Chemical equilibrium ;
Oxidation reduction reactions ;
Ground water ;
Surface water ;
Chelating agents ;
Complex compounds ;
Water pollution ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Studies have shown that a fulvic acid derived from soil is capable of reducing Hg(II) to Hg(0), Fe(III) to Fe(II), and I2 and I3(-1) to I(-1) under conditions generally characteristic of natural waters. The evaluation indicates a reduction potential approximately 0.5 V (vs. normal hydrogen electrode) for fulvic acid which is in agreement with a previous estimate. Although the effect of pH on the reduction processes changes between redox couples, the results generally indicate that hydrogen ion is consumed when fulvic acid is oxidized. These results quite distinctly indicate that fulvic acid may play a prominent role in influencing the redox equilibria occurring in surface and ground waters. (Copyright (c) 1981 by the American Chemical Society).