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Araújo MEB, Silva VC, Fernandes JV, Cartaxo JM, Rodrigues AM, Menezes RR, de Araújo Neves G. Innovative adsorbents based on bentonite mining waste for removal of cationic dyes from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90446-90462. [PMID: 35871192 DOI: 10.1007/s11356-022-22083-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
Waste rock from bentonite mining (WRBM) was evaluated as potential adsorbents for removing crystal violet (CV) and methylene blue (MB) cationic dyes from contaminated water. The waste samples (AM01, AM02, and AM03) were collected from different locations of the bentonite mine and characterized through X-ray diffraction, X-ray fluorescence, Fourier-transform infrared spectroscopy, N2 adsorption/desorption, and cation exchange capacity. The adsorption efficiency of CV and MB dyes was investigated through the effect of initial concentration, contact time, pH, the dosage of adsorbent, and temperature. Sample AM02 showed the largest surface area (69.13 m2/g) and the best adsorptive performance for both dyes, with removal more significant than 90%. The adsorption of CV and MB in the waste followed the Langmuir isothermal model. Samples AM01 and AM02 followed the pseudo-second-order (PSO) kinetic model, while AM03 better fitted the Elovich kinetic model. The enthalpy (ΔH), entropy (ΔS), and Gibbs energy (ΔG) were evaluated as adsorption parameters. The process of adsorption of CV and MB dyes in the waste was predominantly endothermic and occurred spontaneously. WRBM samples proved to be a promising candidate for removing cationic dyes present in water.
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Affiliation(s)
- Maria Eduarda Barbosa Araújo
- Graduate Program in Materials Science and Engineering, Federal University of Campina Grande, Av. Aprígio Veloso - 882, Campina Grande, Paraíba, 58429-900, Brazil
| | - Vanderlane Cavalcanti Silva
- Graduate Program in Materials Science and Engineering, Federal University of Campina Grande, Av. Aprígio Veloso - 882, Campina Grande, Paraíba, 58429-900, Brazil
| | - Jucielle Veras Fernandes
- Graduate Program in Materials Science and Engineering, Federal University of Campina Grande, Av. Aprígio Veloso - 882, Campina Grande, Paraíba, 58429-900, Brazil
| | - Juliana Melo Cartaxo
- Laboratory of Materials Technology (LTM), Academic Unit of Materials Engineering, Federal University of Campina Grande (UFCG), Campina Grande, Paraíba, 58429-900, Brazil
| | - Alisson Mendes Rodrigues
- Laboratory of Materials Technology (LTM), Academic Unit of Materials Engineering, Federal University of Campina Grande (UFCG), Campina Grande, Paraíba, 58429-900, Brazil.
| | - Romualdo Rodrigues Menezes
- Laboratory of Materials Technology (LTM), Academic Unit of Materials Engineering, Federal University of Campina Grande (UFCG), Campina Grande, Paraíba, 58429-900, Brazil
| | - Gelmires de Araújo Neves
- Laboratory of Materials Technology (LTM), Academic Unit of Materials Engineering, Federal University of Campina Grande (UFCG), Campina Grande, Paraíba, 58429-900, Brazil
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Adam AMA, Saad HA, Atta A, Alsawat M, Hegab MS, Refat MS, Altalhi TA, Alosaimi E, Younes AA. Usefulness of charge-transfer interaction between urea and vacant orbital acceptors to generate novel adsorbent material for the adsorption of pesticides from irrigation water. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118188] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bensid N, Zerdoum R, Hattab Z, Boutaleb Y, Bououdina M. Intercalated organo-bentonite as efficient biosorbent for aromatic carboxylic acids from wastewater. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Preparation and Characterization of New CrFeO3-Carbon Composite Using Environmentally Friendly Methods to Remove Organic Dye Pollutants from Aqueous Solutions. CRYSTALS 2021. [DOI: 10.3390/cryst11080960] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Globally, environmental pollution is an important issue. Various pollutants present in water resources, such as bacteria, heavy-metal ions, and organic pollutants, cause serious problems to the environment, animals, plants, and human health. Among the water resources, pollutants, dyestuff, which is discharged from dyeing, textile, and other industrial processes, is an important class of pollutants. Removing these dye pollutants from water resources and wastewater is vital and important due to their toxicity. In this work, a CrFeO3-carbon nanotube (CNT) adsorbent was synthesized using environmentally friendly methods. The synthesized CrFeO3-CNT adsorbent was characterized stoichiometrically, spectroscopically, and morphologically. The synthesized CrFeO3-CNT adsorbent was tested for the removal of two dyes: Methyl violet 2B (MV) and Azocarmine G2 (AC) from an aqueous solution. Crushing CrFeO3 composite with multi-walled fullerene CNT to prepare CrFeO3-CNT adsorbent improved the adsorption performance of free multi-walled fullerene CNT towards MV dye by 30% and towards AC dye by 33.3%.
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An Environmentally Friendly Method for Removing Hg(II), Pb(II), Cd(II) and Sn(II) Heavy Metals from Wastewater Using Novel Metal–Carbon-Based Composites. CRYSTALS 2021. [DOI: 10.3390/cryst11080882] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Rapid economic and industrial development and population growth have made water contamination a serious environmental problem and a major threat to public health worldwide. Heavy metals are extensively used in numerous industrial applications and are some of the most important environmental contaminants. The impacts of heavy metals on the health of humans, animals, and plants make their removal from wastewater and water resources an important and vital issue. In this study, a simple and environmentally friendly method is proposed for the synthesis of a ZnFe2O4-carbon nanotube (CNT) adsorbent material. SEM/EDX analysis and Fourier-transform infrared spectrophotometry (FTIR) are used to characterize the synthesized adsorbent material. We test the synthesized adsorbent material’s ability to recover four heavy metals (Hg(II), Pb(II), Cd(II) and Sn(II) ions) from an aqueous solution. We show that crushing fullerene CNTs with the ZnFe2O4 composite improves the adsorption properties of free fullerene CNTs towards the investigated heavy metal ions by 25%.
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