PMID: 15253052Jul 16, 2004Paper

Phosphorus amendment reduces bioavailability of lead to mallards ingesting contaminated sediments

Archives of Environmental Contamination and Toxicology
G H HeinzDaniel J Audet

Abstract

Lead poisoning of waterfowl has been reported for decades in the Coeur d'Alene River Basin in Idaho as a result of the ingestion of lead-contaminated sediments. We conducted a study to determine whether the addition of phosphoric acid to sediments would reduce the bioavailability of lead to mallards (Anas platyrhynchos). When sediments were amended with 1% phosphorus under laboratory conditions, and diets containing 12% amended sediment were fed to mallards, reductions in tissue lead were 43% in blood, 41% in liver, and 59% in kidney with sediment containing about 4,520 microg/g lead on a dry-weight basis and 41, 30, and 57% with sediment containing about 6,990 microg/g lead. When sediments were treated with phosphorus and left to age for about 5 months in the field, reductions in lead were 56% in blood, 54% in liver, and 66% in kidney at one site with about 5,390 microg/g lead and 64, 57, and 77% at a second site with about 6,990 microg/g lead. In the field, the inability to mix the phosphoric acid uniformly and deeply enough into the sediment may have resulted in more than 1% phosphorus being added to the sediment. Although both lab and field amendments of phosphorus substantially reduced the bioavailability of lead, lead con...Continue Reading

Citations

Feb 1, 2006·Archives of Environmental Contamination and Toxicology·David J HoffmanDaniel J Audet
Jul 15, 2006·Journal of Toxicology and Environmental Health. Part a·David J HoffmanDaniel J Audet
Aug 17, 2010·Ecotoxicology and Environmental Safety·Y Mamindy-PajanyN Marmier
Jun 20, 2013·Integrated Environmental Assessment and Management·W Nelson BeyerJohn Weber
Jan 21, 2015·Journal of Environmental Quality·Lydia R OsborneDaniel G Strawn
Feb 4, 2006·Journal of Environmental Quality·Olha FurmanBarbara Williams
May 9, 2007·Journal of Environmental Quality·Olha FurmanSteve McGeehan

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