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首页> 美国政府科技报告 >Effects of Phosphate Fertilizer Applications and Chemistry-Mineralogy of the Iron Oxide System on Phosphate Adsorption-Desorption by Stream Sediments
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Effects of Phosphate Fertilizer Applications and Chemistry-Mineralogy of the Iron Oxide System on Phosphate Adsorption-Desorption by Stream Sediments

机译：磷肥应用和化学 - 氧化铁系矿物学对河流沉积物磷吸附 - 解吸的影响

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Suspended sediments from the Muskingum River and its tributaries were remarkably uniform in mineralogy and size distribution. Black Fork Creek, a tributary to Moxahala Creek which receives acid drainage from abandoned coal mines was chosen for detailed water quality and bottom sediment studies. Marked increases in dissolved SO4, Fe, and Al, and decreased pH were observed in sections of the stream affected by acid mine drainage. In addition, a gelatinous yellow iron precipitate was abundant in the bottom sediments below sources of pollution. This Fe-oxide or oxyhydroxide precipitate greatly increased surface area and reactivity of bottom sediments and added to the overall sediment load. The laboratories also exhibited a high degree of replication of individual treatments with no laboratory showing a strong consistent bias across all soils and P levels in terms of P adsorption. The proposed method has the potential to produce consistent results which can be used to predict partitioning of dissolved inorganic P between solid and solution phases.

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