The inhibitory effects of carboxymethyl inulin on the seeded growth of calcium carbonate
2012
Kırboga, Semra | Öner, Mualla
Kinetics of precipitation of calcite (CaCO₃) from aqueous solution in the presence of carboxymethyl inulin (CMI) was investigated under strictly controlled temperature, pH, supersaturation ratio (S=4.8) and ionic strength (I=0.1M). The highly reproducible constant composition technique was used to study the influence of biopolymers of crystal growth of CaCO₃, on CaCO₃ seed crystals at pH 8.5 and 25°C. The crystal growth of calcium carbonate (CaCO₃) was inhibited in the presence of CMI at low concentration (2.5×10⁻⁹ to 25×10⁻⁹mol/L). The larger number of negatively charged functional groups exhibited a 95% growth rate inhibition at a concentration of 15×10⁻⁹mol/L. The higher inhibition efficiency is related to the maximum surface charge density due to adsorbed polymer.
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