Study on characteristics of various extractants for mineral carbonation of industrial wastes

Mun, Myoungwook; Cho, Heechan; Kwon, Jihoe

doi:10.1016/j.jece.2017.05.048

Cited by 15 publications

(1 citation statement)

References 17 publications

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“…of HCl, CH3COOH, and NH4Cl for Ca extraction. Additionally, they confirmed the suitability of HCl and CH3COOH for synthesizing calcite and NH4Cl for synthesizing flower-shaped vaterite [38]. Jo et al compared the effects of HCl, CH3COOH, and NH4Cl on three cementitious materials and found that calcite and vaterite were formed for all three extraction solutions.…”

Section: Methodsmentioning

confidence: 85%

Effect of Various Acid Solutions on the CO2 Dissolution Rate, Morphology, and Particle Size of Precipitated Calcium Carbonate Synthesized Using Seashells

Yun,

Lee,

Kim

et al. 2023

Materials

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In this study, the influence of acid solutions on the production of precipitated calcium carbonate (PCC) using seashells was investigated. In terms of the Ca dissolution efficiency and atmosphere for dissolving CO32−, the results indicate that HCl, HNO3, CH3COOH, and HCOOH at 1.0 M were the most ideal among the acid solutions. The use of weak acids resulted in the low degree of dissolution of Al and Fe. These impurities could be mostly removed through the pH adjustment process, leading to PCC with a purity of 99% or more. Further, CH3COOH and HCOOH exhibited low CaCO3 carbonation efficiency owing to the hydrogen bonding of the carboxyl group and its hindering effect on the growth of CaCO3 particles. In addition, in the presence of the carboxyl group, the morphology tended to be oval, and the particle size was small. Particularly, when CH3COOH was used, the combined effect of the low initial Ca ion concentration and slow CO2 dissolution rate resulted in minimal changes during the carbonation time and the smallest particle size. However, variations in the degree of Ca concentration with a change in the acid solution concentration influenced the dominance of nucleation and particle growth, leading to variations in the particle size. The results of this study revealed that when manufacturing PCC using seashells, the appropriate acid solution must be selected to obtain the required PCC properties.

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Section: Methodsmentioning

confidence: 85%