Title: Speciation of Elements Released from Water Treatment Resduals and Their Migration Through a Sandy Soil Authors
Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: May 11, 2006
Publication Date: November 12, 2006
Citation: Novak, J.M., Busscher, W.J., Watts, D.W. 2006. Speciation of elements released from water treatment resduals and their migration through a sandy soil [abstract]. ASA-CSSA-SSSA 2006 International Meetings, November 12-16, 2006, Indianapolis, Indiana. 2006 CDROM. Technical Abstract: Water treatment residuals (WTRs) are by-products from drinking water treatment facilities that use chemical amendments to flocculate sediments from raw water sources. These residuals are composed of a variety of organic and inorganic compounds as a result of the mineral composition of the sediments, background water chemical composition and chemicals used during purification. While WTR application to phosphorus (P) enriched soils has shown successful abatement of P movement, there are environmental concerns that WTRs can also release trace elements. We examined the organic and inorganic chemical characteristics of soil and deionized water leachate from a Norfolk soil incubated for 30 and 60 d after the addition of 0 and 60 g/kg WTR. The redox status of the treatments was determined and the elemental composition was characterized in the soil and water leachate. Results indicate that the WTR significantly increased the dissolved organic carbon, Mn, Na, and S contents and decreased soluble Al and Fe concentrations.