Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2005
Publication Date: 11/8/2005
Citation: Penn, C.J., Bryant, R.B., Callahan, M.P. 2005. Phosphorus sorption mechanisms in acid mine drainage treatment residuals and industrial byproducts [abstract]. ASA-CSSA-SSSA Annual Meeting AbstractsAbstracts. Phosphorus Chemistry in Soils: I. P Availability. Paper No. 4.
Interpretive Summary: An interpretive summary is not required.
Technical Abstract: Prevention of phosphorus (P) losses from agricultural land to surface waters is critical to water quality issues such as eutrophication. Residuals resulting from acid mine drainage (AMD) neutralization and other P-sorbing industrial byproducts (gypsum, flyash, and municipal water treatment residuals) were evaluated for their ability to reduce available P concentrations in soil and manure. Amendments were used in a P sorption isotherm at an amendment:solution ratio of 1:15 with concentrations of 0, 1, 5, 10, 25, 50, 100, 200, 400, 800, 1600, and 3200 mg P L-1, shaken for 16 h, and filtered before P analysis. Amendments with 3200 mg P L-1 added were air dried and sequentially desorbed five times with deionized water, followed by solution P analysis. Samples from before and after sequential desorptions were chemically fractionated for P using the Hedley method. Manure P reduction was evaluated by conducting an isotherm involving the addition of each amendment to dairy, swine, and poultry manure at six different rates using a manure:solution ratio of 1:200 and shaking for 16 h before filtration and P analysis. Manure samples amended at the highest rate and non-amended samples were chemically fractionated for P by the Hedley method. Each amendment’s potential mechanisms for causing P reductions in both soil solutions and manures will be discussed. Differences with respect to the ability of each amendment to retain P based on properties such as pH, calcium, iron, and aluminum content will be described.