Enhanced removal of methylene blue and procion deep red H-EXL dyes from aqueous environments by modified-bentonite: Isotherm, kinetic, and thermodynamic

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 320, P. 100607 - 100607

Published: July 15, 2024

This study aims to enhance local bentonite's effectiveness in removing methylene blue and procion deep red dyes from aqueous media through organic modification with cetyltrimethylammonium bromide surfactant. Raw modified bentonites were analyzed using XRF, XRD, FTIR, BET/BJH, DSC techniques. The bentonite showed a crystalline structure mesoporous morphology heterogeneous surface. Optimal adsorption conditions for MB dye 0.2 g adsorbent dose, 60 min contact time, mg/L initial concentration, pH 8, achieving maximum sorption capacity of 6.418 mg/g. For PDR dye, optimal 0.125 40 30 acidic pH, 8.503 Isotherm analysis indicated the Langmuir model best fits data, suggesting mono-layer process. Kinetic investigations revealed that follows pseudo-second-order model, indicating chemisorption mechanism. Thermodynamic results exothermic endothermic PDR. work highlights potential surfactant-modified as cost-effective sorbent treating polluted systems, effectively both cationic anionic dyes.

Language: Английский

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Synthesis of Fe3O4@SiO2–branched polyethylenimine nanospheres for removal of Cr(VI) and anionic dyes

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 702, P. 135063 - 135063

Published: Aug. 15, 2024

Language: Английский

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New insights into the management of hardwater using bentonite: Studying the mechanism via experiments and statistical physics treatment

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: June 21, 2024

Hard water is related to some health issues owned numerous diseases and economic challenges associated with the calcification of industrial water. Hence, in present research, treatment hard groundwater via adsorption polyvalent Ca^{+ 2} Mg^{+ ions at different initial concentration using bentonite was investigated. Full characterization adsorbent carried out techniques. At all solution temperatures, formation a monolayer these caused by Ca2+ Mg2+ hardness–bentonite interaction, process ascribed active sites homogenous characteristic since Langmuir model fit data (R2 = 0.99). The statistical physics indicated that advanced fitted temperatures. Based on this statical model, mixed (parallel non-parallel orientations) geometry recognized. density (the steric NM parameter) rose from 688 1019 mg g− 1 within 25° 50 ºC factor main variable influencing capacity. Overall, recommended current study as cost-effective environmentally safe remove TH groundwater.}

Language: Английский

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Use of Vegetable Waste for New Ecological Methods in Wool Fibre Treatments

Clean Technologies, Journal Year: 2024, Volume and Issue: 6(4), P. 1326 - 1339

Published: Oct. 1, 2024

In this current research, various amino acids (lysine, betaine, and cysteine) peptides (oxidised or reduced glutathione) were considered as potential environmentally friendly alternatives to wool bleaching. A greener methodology was also applied dyeing. Different agro-wastes (red cabbage, peppercorns, red yellow onion peels) served raw pigment materials. The process’s efficiency characterised by the whiteness degree, colour strength, fastness accelerated washing perspiration. higher index value observed in cysteine-based formulations. peel exhibited significant tinctorial properties due presence of some natural mordants. All proposed treatments designed with a primary focus on environmental sustainability. These offer sustainable alternative traditional bleaching dyeing methods for wool. They reduce costs energy consumption while creating added valorising waste.

Language: Английский

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