Solid phase characterization and transformation of illite mineral with gas-phase ammonia treatment

Pietro, Silvina A. Di; Emerson, Hilary P.; Katsenovich, Yelena; Johnson, Timothy J.; Francis, Robert C.; Mason, Harris E.; Marple, Maxwell A. T.; Sawvel, April M.; Szecsody, James E.

doi:10.1016/j.jhazmat.2021.127657

Cited by 12 publications

(3 citation statements)

References 82 publications

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“…The loading spectrum of GCM is illustrated in figure 4 and encompasses the following FTIR spectral bands: two stretching bands associated with structural hydroxyl groups (3691 and 3619 cm -1 ), a band corresponding to Si-O stretching (987 cm -1 ), deformation bands related to Al-Al-OH vibration (987 cm -1 ), and deformation bands associated with Al-O-Si in-plane vibration (797 cm -1 ) (Ashour and Tony, 2020).The bands observed at 3619 cm -1 , 987 cm -1 , and 797 cm -1 are attributed to illite, similar results were found in the study reported by Oumar et al in 2022. The bands at 1638 and 1634 cm -1 in the loading spectra are indicative of carbonates present as impurities in the sample (Di Pietro et al, 2022). The presence of carbonates in this sample is minimal; hence, the intensity of the band in the IR spectra is very weak.…”

Section: Ftir Analysismentioning

confidence: 93%

Green clay materials applied in packed bed columns for adsorption of hexavalent chromium from aqueous solutions

Eloussaief,

Dammak,

Ghrab

et al. 2024

Preprint

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The removal of hazardous metal ions from polluted water is a crucial process aimed at enhancing water quality. In this study, we conducted a dynamic adsorption investigation utilizing natural green clay for the removal of hexavalent chromium from aqueous solutions. The material underwent characterization through various techniques, including fluorescence spectrometry (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and nitrogen-physisorption (BET). Column tests of green clay material and sand mixtures were performed to evaluate sorption in dynamic systems. Adsorption conditions were examined by varying the initial Cr6+ concentration, flow rate and column height. The maximum purification was achieved at a concentration of 50 mg/L, a flow rate of 3mL/min and a bed height of 12 cm. The mathematical models of Bohart-Adams, Thomas, and Yoon-Nelson were employed to analyze experimental data and predict breakthrough curves in continuous adsorption. Through comparison of R2 values, it was determined that the Yoon-Nelson and Thomas diffusion models effectively capture and accurately describe the experimental data. The results obtained indicate a potential expansion of fixed-bed adsorption for the heavy metals treatment in industrial-scale wastewater. Additionally, the natural green clay material exhibited remarkable reusability and showed promising characteristics for various environmental and industrial applications.

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Section: Ftir Analysismentioning

confidence: 93%

Green clay materials applied in packed bed columns for adsorption of hexavalent chromium from aqueous solutions

Eloussaief,

Dammak,

Ghrab

et al. 2024

Preprint

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“…However, in these experimental samples, the infrared signals at 800, 777, and 747 cm −1 (Figure 4) show faint but sensible variations that would be interest to OH bending vibrations/interactions with cations, thus pointing to possible leeching processes. The 1000 and 900 cm −1 bands, related to Si-O-Si stretching and Al-Al-OH bending [28], can be tentatively attributed to structural modification of the illite clays or muscovite with possibly consequent cation losses.…”

Section: Diffusion Experimentsmentioning

confidence: 93%

CO2 Reaction-Diffusion Experiments in Shales and Carbonates

et al. 2022

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The evaluation of caprock integrity and reservoir efficiency is critical for safe CO2 geological storage management. It is therefore important to investigate geochemical reactions between CO2-rich fluids and host rocks and their contribution in retaining CO2 at depth. This study deals with diffusive reaction experiments on shales and carbonate samples cored from an offshore structure in the Malaysian basin, a potential target for CO2-enhanced gas recovery. The aim is to evaluate the CO2 reaction front velocity in a typical shaly caprock and the mineral response of the reservoir. Rock samples were characterized in terms of texture, chemistry, and mineralogy by X-ray diffraction, electron microscopy (SEM), microanalysis (EDS), infrared spectroscopy (FT-IR), rock geochemistry (XRF), and mercury injection capillary permeability (MICP). Performed analyses show mineralogical alteration induced by CO2 as it penetrated into the samples. Carbonate dissolution and weathering of pyrite to form secondary carbonates belonging to siderite-ankerite series were observed along two reaction fronts. Estimated diffusion coefficients of CO2 are two orders of magnitude lower than CO2(aq) molecular diffusion in pure water and from half to an order of magnitude lower than diffusivity computed on unaltered sample, highlighting the important effect of gas–water–rock reactions on the CO2(aq) diffusivities in shales and carbonates. Results obtained in this study provide an insight regarding the effect of geochemical reactions on CO2 transport and represent a further discussion point on the diffusion coefficients.

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“…The properties of illite are no swelling, adequate plasticity and workability, and change in color from grey to red and black depending on the amount of ion oxides calcite, and pyrite, as well as the process of firing. This type of clay is common in the Mediterranean area [36,37]. (iii) Smectite: This involves several minerals, including montmorillonite ((Na, Ca) 0 .…”

Section: Claymentioning

confidence: 99%

The Use of Waste Ceramic in Concrete: A Review

Jwaida,

Dulaimi,

Bernardo

2024

CivilEng

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Waste ceramic is produced from different sources and, if not reused, is often disposed of in landfills, contributing to the pressure on landfill capacity and potentially releasing toxins into the surrounding environment as ceramics break down over time. The waste can easily be crushed to the required sizes, which has interested many researchers. It has been used as a replacement for concrete constituents, including cement and aggregates. This offers a promising avenue for reducing the environmental impact and promoting sustainable construction practices by reducing the amount of energy consumed and resources required for concrete production, as well as the amount of waste being sent to landfills. This paper aims to provide a review of the use of waste ceramic in concrete. In essence, the paper is divided into several sections. The first section highlights the current environmental issues associated with concrete production and waste disposal. The second section deals with ceramics, its raw materials, production steps, and the different types of waste ceramic used in concrete. A literature review of the use of waste ceramic in concrete was included in the third section. The study reports different research on the use of waste ceramic and its impacts on the mechanical and durability properties of concrete.

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Solid phase characterization and transformation of illite mineral with gas-phase ammonia treatment

Cited by 12 publications

References 82 publications

Green clay materials applied in packed bed columns for adsorption of hexavalent chromium from aqueous solutions

Green clay materials applied in packed bed columns for adsorption of hexavalent chromium from aqueous solutions

CO2 Reaction-Diffusion Experiments in Shales and Carbonates

The Use of Waste Ceramic in Concrete: A Review

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