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THE INFLUENCE OF IRON AND SULFUR CYCLING ON ARSENIC PARTITIONING IN SOILS AND SEDIMENTS
Citation:
Ford*, R AND R T. Wilkin*. THE INFLUENCE OF IRON AND SULFUR CYCLING ON ARSENIC PARTITIONING IN SOILS AND SEDIMENTS. Presented at Agromony, Crop and Soil Sciences Annual Meeting, Minneapolis, MN, 11/5-9/2000.
Description:
Field evidence suggests that arsenic solid-solution partitioning in natural systems is often tied to iron and sulfur cycling. This is likely due to the coprecipitation of arsenic as a trace component in poorly crystalline iron oxides and monosulfides. However, there is limited information on the mechanisms and rates of arsenic coprecipitation and potential stabilization during the formation and transformation of metastable iron oxides and monosulfides. Laboratory aging studies have been initiated to study the influence of iron and/or sulfur precipitation on arsenic solid-solution partitioning under oxic and suboxic conditions. Changes in oxide or sulfide mineralogy and the resultant influence on the degree of arsenic uptake from solution will be reported.