Hydrothermal chemical modification of red mud for efficient adsorption of methylene blue

Environmental Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 14

Published: Aug. 16, 2024

Red mud (RM) is the industrial solid waste produced after alumina extraction from bauxite, and most RM directly discharged to landfill yards without any treatment. In this study, modified red (MRM) was synthesized by a hydrothermal chemical modification method as an efficient adsorbent for methylene blue (MB) removal. The prepared MRM characterized X-ray fluorescence spectroscopy, diffraction, scanning electron microscope, transmission Fourier transform infrared spectrometer. effects of reaction time, initial MB concentrations, dosage, temperature, system pH were investigated in batch adsorption experiments. results showed that increased specific surface area material 16.72 414.47 m2/g. maximum capacity 280.18 mg/g under conditions concentration 1000 mg/L, time 300 min, temperature 25 ℃, natural 6.06. Meanwhile, kinetics equilibrium isotherms demonstrated fit well with pseudo-second-order kinetic model Temkin isotherm, respectively. This study provides new valorization demonstrates can be used low cost environmentally friendly potential removal wastewater.

Language: Английский

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Red mud used as roadbed material: revealing the long-term leaching characteristics of heavy metals and associated health risk

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 115166 - 115166

Published: Dec. 1, 2024

Language: Английский

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Synthesis of submicron ferrous oxalate from red mud with high Fenton catalytic performance on degradation of methylene blue

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(36), P. 85210 - 85222

Published: June 29, 2023

Language: Английский

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Determination of metal fractions and rare earth anomalies in red mud: the case of bauxite mining district of Seydişehir (Turkey)

Environmental Earth Sciences, Journal Year: 2024, Volume and Issue: 83(3)

Published: Jan. 23, 2024

Abstract A three-step sequential extraction was carried out by modified BCR approach for fractionation of metals, including rare earths in red mud. Acetic acid leaching, hydroxylamine hydrochloride + nitric hydrogen peroxide ammonium acetate and orthophosphoric digestion microwave were performed to determine ion exchangeable (F1), reducible (F2), oxidizable (F3), residual (F4) fractions respectively. Accordingly, the highest readily soluble phases obtained Ca, Na, K, while Al, Zn, Cu, Li. Rare earth elements (REEs) except Eu mostly identified fraction. Most (88.7%) detected fraction, negligible part residual. Chondrite normalization implemented obtaining REE anomalies. The remarkable Gd negative anomaly differences determined between mud its origin, Mortaş bauxite. LREE HREE ratio La N /Yb scores 8.42 7.82, respectively indicated enrichment HREE. By performing multivariate analysis, six five-group clusters REEs non-REE metals terms fractional distribution, proving easier release potential Eu, La, Gd, Ca.

Language: Английский

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Advancement in electrokinetic processes for efficient critical metal Extraction: Unveiling the potential of electrokinetic In-Situ leaching (EK-ISL) in mining and mineral processing

Minerals Engineering, Journal Year: 2024, Volume and Issue: 213, P. 108744 - 108744

Published: May 22, 2024

Language: Английский

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