Innovative adsorbents based on bentonite mining waste for removal of cationic dyes from wastewater

Araújo, Maria Eduarda Barbosa; Silva, Vanderlane Cavalcanti; Fernandes, Jucielle Veras; Cartaxo, J. M.; Rodrigues, Alisson Mendes; Menezes, Romualdo Rodrigues; Neves, Gelmires de Araújo

doi:10.1007/s11356-022-22083-z

Cited by 7 publications

(7 citation statements)

References 94 publications

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“…Exchangeable cations, typically Na + and Ca 2+ , neutralize the negative charges on the surface and counterbalance this charge imbalance [18]. Although bentonite has a significant capacity for adsorbing cationic dyes [19][20][21], it often struggles to effectively remove anionic dyes.…”

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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“…Moreover, bentonite mining generates a large amount of waste that has a significant environmental impact and has no commercial value. Because the particles are so fine that they can be transported through the air and can penetrate and settle in the lungs, improper waste disposal causes soil and groundwater pollution as well as poses risks to fauna, flora, and human health . Considering the widespread distribution of bentonite in nature and its use in a wide variety of consumer products, it is inevitable that quarry workers, the general population, and the environment will be exposed to PTEs contained in bentonite.…”

Section: Introductionmentioning

confidence: 99%

“…Because the particles are so fine that they can be transported through the air and can penetrate and settle in the lungs, improper waste disposal causes soil and groundwater pollution as well as poses risks to fauna, flora, and human health. 19 Considering the widespread distribution of bentonite in nature and its use in a wide variety of consumer products, it is inevitable that quarry workers, the general population, and the environment will be exposed to PTEs contained in bentonite. From this point of view, it is important to know the concentrations of PTEs contained in bentonites.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Levels of Potentially Toxic Elements Contained in Natural Bentonites Collected from Quarries in Turkey

Altıkulaç

Turhan

2023

ACS Omega

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Potentially toxic elements (PTEs) are an important type of pollutant, causing constant and far-reaching concerns around the world due to their increase in the mining process. Bentonite formed by the alteration of glass-rich volcanic rocks is a smectite clay consisting mostly of montmorillonite. Bentonite is an important mineral used in a wide range of applications in many fields such as oil and gas, agriculture, food, pharmacological, cosmetic, and construction industries due to its unique qualities. Given the widespread distribution of bentonite in nature and its use in a wide variety of consumer products, it is inevitable that the general population will be exposed to PTEs contained in bentonites. In this study, concentrations of PTEs in 69 bentonite samples collected from quarries located in different geographical regions of Turkey were analyzed by an energy-dispersive X-ray fluorescence spectrometric method.

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“…Various mining waste types stand out, including iron ore tailings [36][37][38], kaolin waste [39,40], scheelite [41,42], ornamental rock waste [43,44], perlite waste [45][46][47][48], etc. In a recent study, Araújo et al [49] evaluated the potential for reusing waste from bentonite mining as adsorbents for treating water contaminated with cationic dyes. The authors found that bentonite waste can also remove cationic dyes in wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Reuse studies of bentonite mining waste are still scarce. It is known that these wastes are generally composed of iron and sodium silicate, calcite, feldspar, and smectite [49], which makes it possible to use them as raw materials in ceramic industries. However, no studies were found in the literature that reused bentonite mining waste as a raw material to manufacture ceramic products.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Bentonite Mining Waste in Ceramic Formulations for the Manufacturing of Porcelain Stoneware

et al. 2022

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Mining processes produce a massive amount of waste which, if not treated properly, can cause significant environmental and social impacts. Recently, some studies have focused on the use of mining waste as an alternative raw material. This work developed new sustainable ceramic formulations based on bentonite mining waste (BMW) for applications in porcelain stoneware. The BMW was incorporated into the ceramic masses in different percentages (0, 2.5, 5, 10, 15, 20, 25, and 40 wt.%), in partial replacement to feldspar and total to quartz. X-ray diffraction (XRD), differential thermal calorimetry (DTA), and thermogravimetry analysis (TGA) techniques were used to characterize bentonite waste. Samples (50 mm × 20 mm × 5 mm) were obtained by uniaxial pressing. Such samples were dried and sintered at 1150, 1200, and 1250 °C. The physical–mechanical properties (apparent porosity, water absorption, linear shrinkage, apparent density, and flexural strength) were evaluated for sintered samples. The phases formed after sintering treatments were characterized by XDR and scanning electron microscopy (SEM). The BMW presented a mineralogical composition suitable for use as ceramic raw material. In summary, our results presented that the new sustainable ceramic formulations sintered at 1250 °C have the potential for use in stoneware and porcelain stoneware.

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Innovative adsorbents based on bentonite mining waste for removal of cationic dyes from wastewater

Cited by 7 publications

References 94 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

Assessment of the Levels of Potentially Toxic Elements Contained in Natural Bentonites Collected from Quarries in Turkey

Incorporation of Bentonite Mining Waste in Ceramic Formulations for the Manufacturing of Porcelain Stoneware

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