Effects of Ca²⁺ Concentration on Calcium Carbonate Crystallization in Lignin Solution System

Abstract:

The calcium carbonate crystallization was controlled by Ca²⁺ concentrations, under the system of lignin solution with concentration of 10 g / L. Its morphology, structure and thermal decomposition were characterized by FT-IR, SEM, XRD and TG. Results showed that in lignin solution system, concentration of Ca²⁺ had significant effects on the crystallized morphology, orientation and crystallinity of calcium carbonate. Calcium carbonate crystal under low Ca²⁺ concentration had more uniform size while under high Ca²⁺ concentration which tended to form various sizes with more complete crystallization. The calcium carbonate crystals were all calcite calcium carbonate, which formed under different Ca²⁺ concentrations.

• Periodical: Materials Science Forum (Volume 695)
• Pages: 521-524
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.695.521
• Online since: July 2011
• Authors: Wen Kun Zhu, Xue Gang Luo, Xiao Yan Lin, Pan He
• Keywords: Calcium Carbonate, Crystallization, Lignin

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