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  • Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy

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    Accepted Manuscript (AM)
    Author(s)
    Vogel, Christian
    Adam, Christian
    Sekine, Ryo
    Schiller, Tara
    Lipiec, Ewelina
    McNaughton, Don
    Griffith University Author(s)
    Sekine, Ryo
    Year published
    2013
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    Abstract
    The reaction mechanisms of phosphate-bearing mineral phases from sewage sludge ash-based fertilizers in soil were determined by Raman and synchrotron infrared microspectroscopy. Different reaction mechanisms in wet soil were found for calcium and magnesium (pyro-) phosphates. Calcium orthophosphates were converted over time to hydroxyapatite. Conversely, different magnesium phosphates were transformed to trimagnesium phosphate. Since the magnesium phosphates are unable to form an apatite structure, the plant-available phosphorus remains in the soil, leading to better growth results observed in agricultural pot experiments. ...
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    The reaction mechanisms of phosphate-bearing mineral phases from sewage sludge ash-based fertilizers in soil were determined by Raman and synchrotron infrared microspectroscopy. Different reaction mechanisms in wet soil were found for calcium and magnesium (pyro-) phosphates. Calcium orthophosphates were converted over time to hydroxyapatite. Conversely, different magnesium phosphates were transformed to trimagnesium phosphate. Since the magnesium phosphates are unable to form an apatite structure, the plant-available phosphorus remains in the soil, leading to better growth results observed in agricultural pot experiments. The pyrophosphates also reacted very differently. Calcium pyrophosphate is unreactive in soil. In contrast, magnesium pyrophosphate quickly formed plant-available dimagnesium phosphate.
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    Journal Title
    Applied Spectroscopy
    Volume
    67
    Issue
    10
    DOI
    https://doi.org/10.1366/13-07056
    Copyright Statement
    © 2013 Society for Applied Spectroscopy. The attached file is reproduced here in accordance with the copyright policy of the publisher. The final, definitive version of this paper has been published in Applied Spectroscopy, Volume: 67 issue: 10, page(s): 1165-1170 2013 by OSA Publishing.
    Subject
    Analytical chemistry
    Analytical chemistry not elsewhere classified
    Physical chemistry
    Mechanical engineering
    Publication URI
    http://hdl.handle.net/10072/382231
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    • Journal articles

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