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Title:   Author  item
                                            Adler, Paul
  Submitted to: Effects of Animal Feeding Operations on the Environment US Geological Survey
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/1/1999
                                    Publication  Date: N/A
                                    Citation: Adler, P.R. 1999. Phosphate sorption by base metal hydroxides generated in the neutralization of acid mine drainage. US Geological Survey Symposium, Effects of Animal Feeding Operations (AFO's) on Hydrologic Resources and the Environment.  August 30 - Septmeber 1, 1999, Fort Collins, CO.Interpretive Summary:
                                Technical Abstract: Excess phosphate runoff from animal production facilities can result in nutrification of watersheds with serious consequences for aquatic life and water quality.  In this research, the metal hydroxide waste product generated in the neutralization of acid mine drainage (AMD) was tested for adsorption capacity of phosphate.  The sludge would be an economical source eof material for phosphate sequestration should adsorption densities prove adequate.  Adsorption isotherms showed loadings of 30 to 50 mg P per gram dry weight of the sludge. Phosphate adsorption also occurred under anaerobic conditions, such as would be found in waste lagoons.  The effects of iron and aluminum content of the AMD sludge on the rate and extent of P adsorption were also investigated.  Longer-term soil bag tests are now underway to confirm these promising initial results.


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