Prediction of water soluble arsenic in sewage-soil systems
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Abstract
Missouri orchard soils were analyzed for total As, Pb, and Cu content. All Cu concentrations were normal, while Pb and As concentrations varied from natural levels to over 2000 ppm for Pb and 350 ppm for As. The Bray tests for available phosphorus were high by 0-8 to 16.8 percent due to arsenic interference on soils from arsenic contaminated fields. Fifteen g samples of a Sharpsburg silty clay loam and a Menfro silt loam soil containing 320 and 160 g As/g, respectively, were equilibrated for 21 days with 30 ml of distilled water or 1 percent dextrose. After 21 days the samples were freeze dried, divided into 2 groups, one air dry and the other at 26.7 percent water and exposed to the atmosphere. Eh, pH, As, Fe, Al, Mn, Ca and Pb in solution were determined periodically. After an initial Eh drop in the 1 percent dextrose equilibration, the As in solution increased rapidly in both soils, but was constant after 12 days.
This material is based upon work supported by the U.S. Geological Survey and the Missouri Water Center under the Grant/Cooperative Agreement.
The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey or Missouri Water Center. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey or Missouri Water Center.
This material is based upon work supported by the U.S. Geological Survey and the Missouri Water Center under the Grant/Cooperative Agreement.
The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey or Missouri Water Center. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey or Missouri Water Center.