title: The inhibitory effects of carboxymethyl inulin on the seeded growth of calcium carbonate.
abstract: Kinetics of precipitation of calcite (CaCO(3)) 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 CaCO(3), on CaCO(3) seed crystals at pH 8.5 and 25°C. The crystal growth of calcium carbonate (CaCO(3)) was inhibited in the presence of CMI at low concentration (2.5×10(-9) to 25×10(-9)mol/L). The larger number of negatively charged functional groups exhibited a 95% growth rate inhibition at a concentration of 15×10(-9)mol/L. The higher inhibition efficiency is related to the maximum surface charge density due to adsorbed polymer.
authors.affiliation: Yıldız Technical University, Chemical Engineering Department, Davutpasa Campus, 34210 Esenler, Istanbul, Turkey. skirboga@yildiz.edu.tr
authors.forename: Semra
authors.initials: S
authors.lastname: Kırboga
authors.forename: Mualla
authors.initials: M
authors.lastname: Oner
mesh_terms: D002119:Calcium Carbonate / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007444:Inulin / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D033362:Powder Diffraction; D015203:Reproducibility of Results; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D007444:Inulin; D002119:Calcium Carbonate