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Trihalomethane Reactivity of Water- and Sodium Hydroxide–Extractable Organic Carbon Fractions from Peat Soils

^a Hydrology Program, Department of Land, Air and Water Resources, University of California, Davis, CA 95616
^b Municipal Water Quality Investigations Program Branch, Division of Environmental Services, California Department of Water Resources, P.O. Box 942836, Sacramento, CA 94236-0001
^c USDA-ARS, Water Management Research Unit, Parlier, CA 93648
^d Environmental Water Quality and Estuarine Studies Branch, Division of Environmental Services, California Department of Water Resources, P.O. Box 942836, Sacramento, CA 94236-0001

View larger version (28K): [in a new window]   Fig. 1. Extraction and sequential fractionation scheme.

View larger version (21K): [in a new window]   Fig. 2. Sizes of three organic carbon fractions relative to total H2O- and NaOH-extractable organic carbon. Error bars represent one standard deviation.

View larger version (22K): [in a new window]   Fig. 3. Specific ultraviolet absorbance (SUVA) and specific trihalomethane formation potential (STHMFP) of whole extracts by H2O and NaOH from three soils. Dot lines are averages for the three soils. Values between dot lines are percentage difference. Error bars represent one standard deviation.

View larger version (37K): [in a new window]   Fig. 4. Specific ultraviolet absorbance (SUVA) and specific trihalomethane formation potential (STHMFP) of organic carbon fractions extracted with H2O and NaOH from three soils. Dot lines are averages. The values between dotlines are percentage difference and p values from the paired t tests. Error bars represent one standard deviation.