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Phytate Complexes Synthesis and Physicochemical Characterization
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

It is well known that the presence of phosphorus in the soil is strongly affected by its interactions with soil components e.g. adsorption and desorption from soil particles. Different analytical techniques such as 31P solid state nuclear magnetic resonance spectroscopy (NMR), and Fourier transform infrared spectroscopy (FTIR) have been used to study the interaction of the organic phosphorus compound phytic acid (IP6) with different metal ions as well as with the clay mineral montmorillonite. Four different phytate complexes with sodium, calcium and aluminum, respectively, were prepared at different pH values (6, 9, 10, 12) and concentrations. Spectroscopic characterization of the complexes revealed that the interaction between metal ions and IP6 increased with increasing ionic charge. IP6 also interacts with ions present in montmorillonite such as sodium, calcium and aluminum. The interaction was found to be affected by both pH and ion concentration. At low pH only weakly bonded outer sphere complexes could be detected, while at higher pH inner sphere complexes also form on the montmorillonite surfaces.

Place, publisher, year, edition, pages
2014.
Keyword [en]
Physics Chemistry Maths
Keyword [sv]
Fysik, Kemi, Matematik
Identifiers
URN: urn:nbn:se:ltu:diva-45790Local ID: 3746c855-b829-480e-8f55-4ffe2129882aOAI: oai:DiVA.org:ltu-45790DiVA: diva2:1019087
Subject / course
Student thesis, at least 30 credits
Educational program
Chemical Engineering, master's level
Supervisors
Examiners
Note
Validerat; 20140424 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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