Qualitative and quantitative investigations of Cr (VI) uptake by amorphous nanoparticulate ferrites doped with organic chelating agents

Journal of Hazardous Materials Advances, Journal Year: 2025, Volume and Issue: unknown, P. 100647 - 100647

Published: Feb. 1, 2025

Language: Английский

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Synergistic effect and mechanism of ferric ion modified citric acid depressant in the flotation separation of scheelite from cassiterite

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 353, P. 128423 - 128423

Published: June 14, 2024

Language: Английский

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Chromium removal via coprecipitation with carbonates and iron oxyhydroxides minerals: The effect of organic complexing agents

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 965, P. 178686 - 178686

Published: Feb. 1, 2025

With the recent review of European Environmental Regulations for Water Quality, which plan to reduce contaminant concentration limits in drinking and surface waters by 2036, an increasing demand wastewater depollution arises. Metastable amorphous nanoprecursors iron oxyhydroxides (IOH) calcium carbonates (CC) interact with various pollutants natural systems via processes such as coprecipitation adsorption. In this research, ferrihydrite (FHY) were testes Cr (VI) retention cover acidic neutral environments basic media, respectively. An original novel approach is proposed investigating uptake capacity mechanisms well minerals transformation presence two biodegradable organic compounds (EDTA - ethylenediaminotetraacetic acid EDDS ethylenediamine-N,N'-disuccinic acid). Geochemical modelling coprecipitated species was also considered. TCLP (toxicity characteristic leaching procedure) experiments revealed that remains fixed FHY structure under near conditions. One year old ferrite's stability examined showed addition organics slowed into crystalline polymorphs. sequestration ferrites occurred reduced (III) its less toxic specie. Quantitatively, higher amount removed (up 97.65 mg/g) then adsorption (ca. 33.76 mg/g). These findings provide insight influence (bio)availability mobility, affect elemental cycle, including transition across trophic chain at contaminated (i.e., mining sites mine drainage) form naturally.

Language: Английский

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Functionalized Modified Polysaccharides as an Excellent Material for the Ni (II) Removal from Heavy Metal Wastewater

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Language: Английский

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