Fixed-bed column study for the remediation of the bauxite-liquid residue using acid-activated clays and natural clays

Dodoo, Daniel; Appiah, Godfred; Acquaah, George; Dodoo, Thomas

doi:10.1016/j.heliyon.2023.e14310

Cited by 6 publications

(3 citation statements)

References 51 publications

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“…However, activated carbon is relatively expensive, so many reports have considered other substitutes [13]. Clay minerals are gaining recognition for their potential use as environmental remediation agents [14,15]. Due to its cost-effectiveness, wide availability, and the high specific surface area provided by its sheet-like structure, bentonite is a commonly used adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Performance of Mg/Al and Zn/Al Hydroxide Double Lamellar-Bentonite for Removal of Anionic Azo Dye from Aqueous Solution

Bouhent,

Bentaleb,

Al-Ameri

et al. 2024

Processes

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This paper presents the preparation and characterization of bentonite coated with hydroxide double lamellar Mg/Al-bentonite and Zn/Al-bentonite as a potential adsorbent material. The coating process involved co-precipitation of mixed metal nitrate solution (Mg-Al) or (Zn-Al), followed by immersion of bentonite (B-Na+) dispersion. The structures and morphologies of the coated bentonites were characterized using XRD, FTIR, BET, and SEM analysis. The results of the BET analysis indicate that Mg/Al-bentonite and Zn/Al-bentonite have larger surface areas and pore volumes compared to bentonite alone. Specifically, the surface area of Mg/Al-bentonite is 209.25 m2/g with a pore volume of 0.423 cm3/g, while Zn/Al-bentonite has a surface area of 175.95 m2/g and a pore volume of 0.313 cm3/g. In contrast, the surface area and pore volume of bentonite alone are 110.43 m2/g and 0.132 cm3/g, respectively. The Mg/Al-bentonite reaches 85% uptake within 3 h (equivalent to 724.20 mg/g at 25 °C and pH 7), achieving rapid equilibrium. In contrast, the Zn/Al-bentonite achieves a maximum adsorption of 74% within 5 h under identical pH and temperature conditions, corresponding to 650.34 mg/g. The error function values, including the correlation coefficient R2, chi-square test χ2, and residual sum of squares RSS, were calculated to evaluate both kinetic and isotherm models. The kinetic adsorption data agreed well with a pseudo-second-order model. The adsorption process followed the Sips isotherm model, and the monolayer adsorption capacity of Mg/Al-bent and Zn/Al-bent composites was 872.41 (R2 = 0.974) and 678.45 mg/g (R2 = 0.983), respectively. The thermodynamic analysis of the adsorption process revealed that it occurred spontaneously with an endothermic characteristic. The parameters ΔS, ΔH, and ΔG were used to determine this.

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Section: Introductionmentioning

confidence: 99%

Performance of Mg/Al and Zn/Al Hydroxide Double Lamellar-Bentonite for Removal of Anionic Azo Dye from Aqueous Solution

Bouhent,

Bentaleb,

Al-Ameri

et al. 2024

Processes

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“…The greates t significant commercial adsorbents are alumina, activated carbon, polymers, clays, and silica [7,8]. Particularly, inexpensive natural clay is regarded as a suitable adsorbent since it is readily available, eco-friendly, non-toxic, has a high surface area, and has a variety of active sites on its surface [9,10]. This abundant clay may be used in many water purification processes [11].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of methylene blue dye onto bentonite clay: Characterization, adsorption isotherms, and thermodynamics study by using UV-Vis technique

Jaber Ibrahim,

Abdul Wahid Dwesh,

R.Y. Al-Sawad

2023

Anal. Method Environ. Chem. J.

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This study uses the UV-Vis technique to describe the elimination of methylene blue dye from an aqueous solution by adsorption on an Iraqi bentonite clay surface. The batch approach was used to conduct adsorption studies carried out to evaluate the influence of factors of experimental like contact time (0–90 min), clay dose (0.1–0.35 g), and initial dye concentration (10–125 mg L-1) at the range of temperatures (25-40oC). The Langmuir and the Freundlich isotherms were used to analyze the data; the Langmuir isotherm (R2 = 0.998) proved more appropriate for the equilibrium data. The thermodynamic properties of the adsorption process, including Gibbs free energy (ΔGO), entropy(ΔSO), and enthalpy (ΔHO), were also studied. Since the (ΔGO) and (ΔHO) values were negative, it was clear that the adsorption process constituted an exothermic, spontaneous reaction. This investigation revealed that Iraqi bentonite clay effectively removed the dye methylene blue because of its high surface area. Methylene blue may be removed with an adsorption efficiency of up to 99.39 % at 25oC. By employing bentonite clay as an adsorbent surface, this research offers practical adsorption technology that is affordable and effective for treating wastewater.

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“…Bauxite is a rock group rich in aluminous minerals and dominated by chemical deposition with mechanical deposition characteristics [1][2][3] . More recently, Changqing oilfield has obtained 67.38×10 4 m 3 /d of high-yield industrial gas flow from the Longdong area of the Ordos Basin, achieving a breakthrough in a new unconventional gas reservoir in the Paleozoic bauxite of the basin [4] .…”

Section: Introductionmentioning

confidence: 99%

Research and Application of New Anti-CO2 Pollution and Low Damage Water-based Drilling Fluid

Bai,

Xie,

Cheng

et al. 2023

Preprint

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CO2 intrusion into the drilling fluid during bauxite drilling can cause hydration swelling and dispersion of clays and lead to massive foaming of them. Additionally, the formation develops micro-nano fractures, which also have a large difference in compressive strength and a high percentage of bound water. Once the foreign fluid invades, it will lead to wellbore destabilization and reservoir damage. Thus, the designed drilling fluid formulation does not contain solid phase particles such as bentonite. And we obtained the optimal proportion of hydrolocker, penetrant, and defoamer by Mixture Designs. Then the shielding plugging theory was introduced, and a temporary plugging gradation consisting of acid-soluble inert particles, deformable nano-sealers, and non-permeable sealers was constructed with the aid of BridgePro software. And other surfactants were optimized indoors to build a lowdamage, strong anti-CO 2 pollution water-based drilling fluid. It could resist the high temperature of 150℃ and has a remarkable ability to lower surface tension (17.3mN). The rolling recovery, the plugging rate, and permeability recovery value can reach more than 90%, the lubrication coefficient was around 0.125. The constructed drilling fluid completed 9 wells in field application, with an obvious reservoir protection effect and an average increase of more than 20% in single-well daily production compared to the expected daily production. It will be an important reference for future bauxite horizontal well drilling fluids to prevent CO2 contamination and reduce reservoir damage.

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Fixed-bed column study for the remediation of the bauxite-liquid residue using acid-activated clays and natural clays

Cited by 6 publications

References 51 publications

Performance of Mg/Al and Zn/Al Hydroxide Double Lamellar-Bentonite for Removal of Anionic Azo Dye from Aqueous Solution

Performance of Mg/Al and Zn/Al Hydroxide Double Lamellar-Bentonite for Removal of Anionic Azo Dye from Aqueous Solution

Adsorption of methylene blue dye onto bentonite clay: Characterization, adsorption isotherms, and thermodynamics study by using UV-Vis technique

Research and Application of New Anti-CO2 Pollution and Low Damage Water-based Drilling Fluid

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