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- Title
Effect of NTA and temperature on crystal growth and phase transformations of CaCO 3.
- Authors
Gopi, Shanmukha Prasad; Palanisamy, K.; Subramanian, V.K.
- Abstract
Phase transition from vaterite to calcite is a general behavior of CaCO3materials. The effect of nitrilotriacetic acid disodium salt (NTA) on the crystallization behavior and polymorphism of CaCO3was studied at different temperatures between 60 and 230°C. The morphologies and the structure of the precipitates were characterized using scanning electron microscope, field emission scanning electron microscopy, powder X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy. It was observed that NTA could change the morphologies and crystal structures of CaCO3with temperature and stabilize least stable vaterite at high temperature. An anomalous conversion of calcite to vaterite in the presence of NTA was observed. The effect of amount of NTA added on the crystallization behavior at selected temperatures is reported.
- Subjects
PHASE transitions; CRYSTAL growth; NITRILOTRIACETIC acid; SODIUM salts; CRYSTALLIZATION; X-ray diffraction; RAMAN spectroscopy
- Publication
Desalination & Water Treatment, 2015, Vol 54, Issue 2, p316
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.883332