The Influence of Redox Potential on the Environmental Chemistry of Contaminants in Soils and Sediments
Potentially toxic substances such as heavy metals, pesticides, and industrial organics that enter waterways from land runoff or waste discharge accumulate in sediments. Some of these substances are applied directly to soils as when agricultural fields are amended with sewage sludge, or when pesticides are applied. Mobility and bioavailability of contaminants, and degradation in the case of synthetic organics, affect the environmental risk associated with these toxic materials. These environmental chemistry processes are affected by the physical and chemical properties of the contaminated soils and sediments. Oxidation-reduction status, or redox potential, has received much research attention by the Laboratory for Wetland Soils and Sediments at Louisiana State University during the last 15 years. This chapter reviews some of the published and unpublished work from the laboratory during this period.
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