Saganashkee Slough

In the following sections, examples of size-specific information obtained with hollow-fiber ultrafiltration are presented. Surface waters (50-60 gallons) were taken fi-om Volo Bog (Illinois), Saganashkee Slough (Illinois), and from Lake Bradford (Florida) for the analyses presented. 

Volo Bog is a small, glaciated, sedge peat bog in northern Illinois. The bog has no surface inlet or outlet, and the water is at pH 4-5 with low nutrient concentrations. Saganashkee Slough drains into the Calumet Sag Channel and into the Des Plaines River in northern Illinois. It is at pH 7 and has a higher nutrient content than the bog. The Lake Bradford samples, collected near Tallahassee, Florida had a pH of 5-6. Humic and fulvic acids fi-om this lake have been used in radionuclide binding studies (18). The lake is fed by a spring and by surface runoff... 

Figure 7. DOC distribution in size fractions of a water sample taken from Saganashkee Slough.

Figure 8. Pyrolysis gas chromatographs of size fractions A) 0.45-0.1 micrometers and B) 3K-1K molecular weight of samples obtained from Saganashkee Slough. Marker compounds and retention times are 1) acetonitrile, 5.97 min 2) thiophene, 6.10 min, and toluene, 6.33 min 3) anisole, 11.90 min 4) acetic acid, 13.82 min 5) pyrolle, 15.64 min 6) acetamide, 20.34 min 7) phenol and o-cresol, 25,18 min 8) m-cresol and p-cresol, 26.67 min and 9) indole, 32.53 min.

Figure 9. C-NMR spectrum of the 3K-1K molecular weight size fraction of the sample from Saganashkee Slough. Major functional groups are 1) carboxyl, 2) phenolic, 3) aromatic, 4) methoxy, and 5) aliphatic.

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