Home
Resource
A calcium oxalate phase stability and dissolution study
PDF
PDF format is widely accepted and good for printing.
Plug-in required
PDF-1(8.17 MB)
Citation & Export
View Usage Statistics
Staff View

Citation & Export
Hide

Simple citation

Aljuhani, Nauf Saleh. A calcium oxalate phase stability and dissolution study. Retrieved from https://doi.org/doi:10.7282/T3319ZMF

Export

Click here for information about Citation Management Tools at Rutgers.

Statistics
Hide

Description

TitleA calcium oxalate phase stability and dissolution study
NameAljuhani, Nauf Saleh (author); Kumi, George . (chair); Rutgers University; Camden Graduate School
Date Created2017
Other Date2017-05 (degree)
SubjectChemistry, Calcium oxalate, Dissolution (Chemistry)
Extent1 online resource (xiii, 81 p. : ill.)
DescriptionThe presence of calcium oxalate (CaOx) hydrate crystals, which have low solubility in water, is widespread in nature. These crystals cause undesirable effects in certain aspects of human life, and many of these problems are still unsolved due to the lack of necessary information about the crystallization and dissolution mechanisms of these crystals. To obtain more insight into the thermal stability of CaOx crystals, a comparative study of calcium oxalate monohydrate (COM) dendritic and calcium oxalate dihydrate (COD) bipyramidal crystals has been undertaken using a combination of Raman microscopy and thermal stage. Crystal structure transformations in these crystals with respect to various temperatures were determined. Experimental results indicate that COM is stable up to ~110 °C, and above this temperature the anhydrous calcium oxalate (COA) forms. This transformation is reversible since the COA crystals created convert back to the COM phase upon cooling to temperatures below this transition temperature. In contrast, the COD phase is stable up to 120 °C, and above this temperature COD dehydrates and transforms to COA. This is an irreversible transformation because dehydrated crystals converted to COM upon cooling. The dehydration process for COD alters the overall crystal habit, resulting in cracks and crystal splintering. To further an understanding about CaOx dissolution, an experimental protocol was also developed to study CaOx crystal dissolution using a microfluidic device. CaOx dissolution was investigated in the presence of various carboxylate-ion-bearing species at different solution pH values to demonstrate the capabilities of this device. In the pH range studied (4 – 10), solutions with molecular species containing multiple (more than three) carboxylate ions have a noticeably higher CaOx dissolution ability than molecular species with only a few (two or less) carboxylate ions.
NoteM.S.
NoteIncludes bibliographical references
Noteby Nauf Saleh Aljuhani
Genretheses, ETD graduate
Persistent URLhttps://doi.org/doi:10.7282/T3319ZMF
Languageeng
CollectionCamden Graduate School Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
Version 8.5.5
Rutgers University Libraries - Copyright ©2024