Title: Kinetics of acetic acid-enhanced coarse limestone dissolution

Authors: Shengyu Liu; Wei Qiu; Lichao Nengzi; Chengwei Lu; Bing Qu; Yuanyuan Xu

Addresses: College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China ' College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China ' College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China ' College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China ' College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China ' College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, China

Abstract: The dissolution kinetics of limestone with organic acid additives was studied by pH-stat method. The results showed that the control step of limestone dissolution was changed with pH changing. At same time, the particle size of limestone was an important effect on its dissolution control step too. Enhancement coefficient of limestone dissolution added acetic acid was the function of pH and concentration of acetic acid. By applying the shrinking core model a kinetic model for the limestone dissolution process was fitted to experimental results, which was function of concentration of acetic acid, particle of limestone and pH value and temperature.

Keywords: acetic acid additives; limestone dissolution; kinetics; coarse limestone; particle size; kinetic modelling; pH value; temperature.

DOI: 10.1504/IJEE.2014.062152

International Journal of Environmental Engineering, 2014 Vol.6 No.2, pp.119 - 135

Available online: 31 May 2014 *

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