Calcium elution from cement kiln dust using chelating agents, and CO2 storage and CaCO3 production through carbonation

Kim, Myoung-Jin; Jung, Sungsu

doi:10.1007/s11356-020-08403-1

Cited by 21 publications

(6 citation statements)

References 18 publications

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“…After ltration, the sample was subjected to drying at 110°C throughout one night. The ensuing dried CKD powder was subjected to a calcium elution process using a 0.1M trisodium citrate (TSC) as a chelating agent at a ratio of 1 g CKD to 50 ml TSC [21] in order to extract calcium. The mixture underwent mechanical stirring for one hour, after which the eluate was ltered using lter paper No.…”

Section: Preparation Of Hydroxyapatite From Cement Kiln Dust (Ckd)mentioning

confidence: 99%

A Comparative Study on Synthesis and Characterization of Hydroxyapatite Nanoparticles from Different Industrial and Bio-Wastes

Girgis,

Fathy,

Farrag

et al. 2024

Preprint

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Hydroxyapatite (HAP), as a bioceramic substance, is indispensable for medical bone repair and replacement. As a result, it has a wide range of research and application opportunities in materials science and biomedicine. This study spotlights the feasibility production of sustainable HAP from diverse waste sources to showcasing their potential utilities for environmentally friendly applications and reduced ecological impacts. Thus, cement kiln dust, eggshell and buffalo bone wastes were applied for preparing main HAP precursors such as calcium sulfate, calcium nitrate and non pure HAP in bone, respectively. During reaction of diammonium hydrogen phosphate ((NH4)2HPO4) with extracted calcium sulfate; HAP was obtained via microwave and hydrothermal routes, while chemical precipitation route was performed in case of calcium nitrate extracted from eggshell. Non pure HAP in bone was treated by three methods; i.e., subcritical water process, alkaline hydrothermal hydrolysis and thermal decomposition to produce pure HAP samples. Characterization of HAP obtained was performed using XRD, FTIR, XPS, TGA, N2 adsorption-desorption at -196oC and SEM analyses. CaSO4-CKD and Ca(NO3)2-eggshell were successfully prepared HAP samples with rough surfaces composed of spherical particles into porous HAP with a high total surface area (93.8-150.3 m2/g), whereas HAP obtained from buffalo bone exhibited the lowest porosity (12.9–34 m2/g). The prepared samples outperformed the purchased HAP sample in terms of surface and textural qualities, with a Ca/p ratio of around 1.66, comparable to natural HAP. Conclusively, the calcium supplies derived from CKD and eggshells are superior suited to produce highly porous HAP samples than calcium sources derived from buffalo bones.

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Section: Preparation Of Hydroxyapatite From Cement Kiln Dust (Ckd)mentioning

confidence: 99%

A Comparative Study on Synthesis and Characterization of Hydroxyapatite Nanoparticles from Different Industrial and Bio-Wastes

Girgis,

Fathy,

Farrag

et al. 2024

Preprint

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“…In order to enhance the carbonation behavior, various research efforts have been carried out to promote the leaching of calcium and magnesium ions. Additives like acids (e.g., HCl) and chelating agents (e.g., citrate), which bind Ca 2+ or Mg 2+ ions to promote leaching, have been extensively investigated [15][16][17]. However, some acids like humic acids bind Ca 2+ , forming insoluble humates and decreasing the amount of available Ca 2+ ions [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Glycine on the Wet Carbonation of Steel Slag Used as a Cementitious Material

Cao,

Zhao,

Wang

et al. 2024

Materials

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The wet carbonation process of steel slag (SS) is envisaged to be an effective way to sequestrate CO2 and improve the properties of SS as a supplementary cementitious material. However, the carbonation process still struggles with having a low carbonation efficiency. This paper studied the effect of glycine on the accelerated carbonation of SS. The phase composition change of carbonated SS was analyzed via XRD, FT-IR, and TG–DTG. The carbonation process of SS is facilitated by the assistance of glycine, with which the carbonation degree is increased. After 60 min of carbonation, SS with glycine obtained a CO2 sequestration rate of 9.42%. Meanwhile, the carbonation reaction could decrease the content of free calcium oxide in SS. This significantly improves the soundness of SS–cement cementitious material, and the compressive strength of cementitious materials that contain carbonated SS with glycine is improved. Additionally, the cycling performance of glycine in the successive wet carbonation process of SS was investigated. Multicycle experiments via solvent recovery demonstrated that although the promotion effect of glycine was reduced after each cycle, compared with the SS–water system, the carbonation process could still be facilitated, demonstrating that successive wet carbonation via solvent recovery has considerable potential. Herein, we provide a new idea to facilitate the wet carbonation process of SS and improve the properties of SS–cement cementitious material.

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“…In this method, the mineral feedstock is treated with an extraction agent first to extract the reactive MO before reacting it with CO 2 . The indirect carbonation method has been proven to be more effective with higher carbonation efficiency, shorter reaction time, kinetic favorability, as well as also permitting the disengagement and recovery of products (iron oxides, silica, and carbonates) with excellent levels of purity [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…A similar trend was reported by Galina et al [35], in that higher temperature (100 • C) leads to higher elution efficiency of Mg 2+ using 2.5 M HCl solution. Moreover, Rahmani [26] used red gypsum (mainly consisting of calcium sulfate and hematite) as feedstock material and achieved up to 63% Ca 2+ elution using 1.5 molar (M) sulfuric acid at 70 • C for 2 h. Kim and Jung [20] used cement kiln dust as feedstock and used citrate, malonate, and adipate salts to extract Ca 2+ , and reported that citrate had promising results and could extract up to 42% of Ca 2+ using 0.1 M concentration at 80 • C. Tier et al [36] assessed different acids, bases, and ammonium salt solutions to extract Fe 2+ and Mg 2+ using serpentine samples as feedstock, where 2 M HCl showed promising results that can extract up to 67% of Fe 2+ in 2 h at 70 • C. On the other hand, Razote et al [37] used iron-rich siltation pond waste as feedstock and reported extraction efficiency of Fe 2+ up to 94% using 2.5 M HCl at 75 • C in 2.5 h. Based on the previous studies, results with higher temperatures, concentrations, and higher reaction times for leaching or elution efficiency remain unpractical, e.g., due to energy consumption and its associated costs. Therefore, there is a need to assess the leaching behavior of the feedstock material with new solvents, shorter reaction time, and no heating required (at ambient temperature) to minimize overall cost, time, and energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Elution of Divalent Cations from Iron Ore Mining Waste in an Indirect Aqueous Mineral Carbonation for Carbon Capture and Storage

Soomro,

Mohd Kusin,

Mohamat-Yusuff

et al. 2024

Sustainability

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Mining waste is generated in vast quantities globally, which can have negative environmental consequences. This study highlights the utilization of iron ore mining waste as feedstock material in the preparatory step of an indirect aqueous mineral carbonation for carbon sequestration. The role of reactive cations (Ca2+, Mg2+, and Fe2+) was investigated in view of their elution behavior to improve carbonation efficiency. An elution experiment was carried out for the divalent cations using different acids (oxalic, HCl, acetic, and formic acid) at different concentration solutions (up to 1.5 M) and times (up to 100 min) at ambient temperature. The initial analysis confirmed the presence of divalent cations in the sample. The elution approach at ambient temperature resulted in the elution efficiency of Fe2+ (30.4%), Mg2+ (54%) using oxalic acid, and Ca2+ (98%) using HCl at a relatively short time between 50 and 100 min. It was found that for the iron ore mining waste, oxalic acid and HCl were best suited as elution agents for the Fe2+ and Mg2+, and Ca2+, respectively. The CO2 sequestration potential was calculated to be 131.58 g CO2/kg residue. A further carbonation step using a complexing agent (1,10 phenanthroline) confirmed the formation of siderite and magnesite along with phenanthroline hydrates. Findings have shown that the indirect mineral carbonation of the iron mining waste with complexing agent might improve carbonation efficiency, thus indicating that this material is useful for long-term carbon capture and storage applications.

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Calcium elution from cement kiln dust using chelating agents, and CO2 storage and CaCO3 production through carbonation

Cited by 21 publications

References 18 publications

A Comparative Study on Synthesis and Characterization of Hydroxyapatite Nanoparticles from Different Industrial and Bio-Wastes

A Comparative Study on Synthesis and Characterization of Hydroxyapatite Nanoparticles from Different Industrial and Bio-Wastes

Effect of Glycine on the Wet Carbonation of Steel Slag Used as a Cementitious Material

Elution of Divalent Cations from Iron Ore Mining Waste in an Indirect Aqueous Mineral Carbonation for Carbon Capture and Storage

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