Phosphate adsorption on binary mixtures of ...

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Phosphate adsorption on binary mixtures of ferrihydrite and calcite: Implications for phosphorus bioavailability in alkaline soils

Name:Personal
Henock T. Shibeshi
Role :Text(marcrelator)
creator

Name:Personal
Nidhi Khare
Role :Text(marcrelator)
creator

typeOfResource
text
genre
Powerpoint/PDF
Origin Information Place
Laramie, Wyoming

University of Wyoming
(keyDate="yes")
4/24/2010

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born digital

abstract
It is well known that plants require phosphorus for their growth and that most soils are deficient in phosphorus. This is because plants can take up phosphorus only as dissolved orthophosphate; however, dissolved phosphate in soils is rapidly immobilized by Fe, Al, and Ca minerals due to its high affinity for these minerals. In alkaline soils, phosphate bioavailability is mainly controlled by adsorption/desorption from Fe-oxyhydroxide and calcite minerals. Ferrihydrite is a poorly crystalline analog of Fe- oxyhydroxide minerals in soils. Binary mixtures of ferrihydrite and calcite can therefore serve as effective analogs of phosphate mineral sorbents in alkaline soils. In this study, we investigate phosphate adsorption in single mineral systems of ferrihydrite, calcite and 1:1 by mass ferrihydrite-calcite mixtures as a function of pH (8, 9.5). Our goal is to understand the role of mineral interactive effects on phosphate adsorption in binary mixtures. We present here a comparison of results from wet chemical experiments on phosphate adsorption in single-mineral systems with phosphate adsorption in binary mixtures. This research is pertinent to soil fertility, and biogeochemical cycling of phosphorus. Similar approaches as used in this research could provide valuable insights for nutrient bioavailability and remediation of contaminants in natural systems.
note
From - Undergraduate Research Day 2010 - Celebration of Research - Abstracts
Subject
Undergraduate Research Day

Related Item:Host Title Information
Undergraduate Research Day 2010

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http://digital.uwyo.edu/copyright.htm
Location (usage="primary display")
http://hdl.handle.net/10176/wyu:542