Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2005
Publication Date: 8/5/2005
Citation: Penn, C.J., Bryant, R.B., Callahan, M.P. 2005. Effectiveness of acid mine drainage residuals in reducing phosphorus concentrations in runoff from agricultural soils [abstract]. Mine Waste Water Technology Conference. p. 1.
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 were evaluated for their ability to reduce available P concentrations in soil, manure, and runoff. Other P sorbing amendments (gypsum, flyash, and municipal water treatment residuals) were included in the evaluation. Soil P reduction was evaluated by amending three different soils at five different rates, incubating for two weeks, and extracting with Mehlich-3 and water. 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. Runoff boxes containing Othello soil were amended at the rate of 20 g 100g-1 soil and subjected to simulated rainfall applied at the rate of 7.5 cm hr-1. Runoff was collected and analyzed for dissolved P, total P, and sediment concentrations. Results showed that calcium, iron and aluminum rich AMD residuals were at least equally effective in reducing soil and runoff P concentrations compared to other amendments, while manure P reductions varied based upon manure and amendment properties.