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Citation: ZHANG Xiao-Ni, YU Ping, LUO Yun-Bai. Study on Kinetics of Formation of CaCO₃ Crystal by Solution Conductivity Measurement[J]. Chinese Journal of Applied Chemistry, ;2004, 21(2): 187-191. shu

Study on Kinetics of Formation of CaCO₃ Crystal by Solution Conductivity Measurement

1.
College of Chemistry and Molecule Science, Wuhan University, Wuhan 430072

Corresponding author: YU Ping,
Received Date: 30 April 2003
Available Online: 29 July 2003

The kinetics of calcium carbonate scale formation has been studied based on the conductivity measurement including the rate of the nucleus formation and crystal growth as well as the influences of temperature and the scale inhibitors. The reaction constant and activation energy in the presence of scale inhibitors at different temperatures have been calculated. It shows that the nucleus formation and crystal growth can be expressed as a first order reaction. Temperature and scale inhibitor mainly influence the rates of nuclei formation. The higher temperature, the greater the reaction rate. In some scope of supersaturation, the induction period of calcium carbonate can be prolonged and the rate of calcium carbonate can be reduced by adding a certain concentration of scale inhibitor. But the reaction order remained unchanged. Once the nucleus has formed in the supersaturation solution, the crystal growths more easily. That is, the condition of crystal growth is the presence of a nucleus, the temperature and scale inhibitors have little effect on crystal growth.
- calcium carbonate,
- scale formation,
- conductivity,
- scale inhibitor
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通讯作者: 陈斌, bchen63@163.com

Study on Kinetics of Formation of CaCO₃ Crystal by Solution Conductivity Measurement