LIU Ze-nan,HU Rui-zhu,HUANG Ting-lin.Factors Influencing the Growth Kinetics of Calcite Induced Crystallization[J].China Water & Wastewater,2021,37(11 11):76-83.
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Factors Influencing the Growth Kinetics of Calcite Induced Crystallization

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 11 11 Page: 76-83 Column: Date of publication: 2021-06-01
Author(s):
LIU Ze-nan1; 2; 3; HU Rui-zhu1; 2; 3; HUANG Ting-lin1; 2; 3
(1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Shaanxi Key Laboratory of Environmental Engineering， Xi’an 710055, China; 3. Northwest China Key Laboratory of Water Resources and Environment Ecology, Xi’an 710055, China)
Keywords:
calcite; heterogeneous crystallization; crystallization growth rate; pH-stat; kinetics
Abstract:
Effects of supersaturation, pH, ionic strength and CMg on calcite induced crystallization growth rate were investigated by using pH-stat method. The linear growth rate of calcite was positively correlated with supersaturation and pH, which was (0.1-3)×10-10 m/s, and the correlation coefficients were 0.979 and 0.828, respectively. When the ionic strength was 0.01-0.15 mol/L, increasing ionic strength could promote the growth of calcite, while it had no influence on the linear growth rate of calcite with ionic strength over 0.15 mol/L. Supersaturation might indirectly affect the linear growth rate of calcite by affecting the concentration of CaCO3(aq) in the solution, while pH affected the linear growth rate of calcite by affecting the free calcium ion ［Ca2+］o. Mg2+ had an obvious inhibitory effect on calcite growth. SEM figures showed that the surface structure of calcite would be affected when the ratio of CMg and CCa was 1.5. XRD images showed that aragonite appeared in the calcite crystal.
Last Update: 2021-06-01