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- W2792264532 abstract "The present work introduces a simple methodology of carbon modification with zirconium, using an organic complexing ligand, as efficient media for selective As(V) removal. It is hypothesized that the incorporation of Zr-nanoparticles improves the attraction of anionic species such as arsenates (HAsO42−/H2AsO4−) making the material highly selective. The effects of pH (3–11) and temperature (15, 25 and 35 °C) were studied. Furthermore, potentiometric titrations, the effect of competing anions, thermodynamics, and adsorption kinetics were evaluated in order to clarify the rate-controlling process and the adsorption mechanism for arsenic removal. Results demonstrated that OH and COOH groups play an important role during the arsenic adsorption process; a small amount of Zr(IV) species (0.77%) increased the adsorption capacity of activated carbon in about a 43%. Thermodynamic analysis showed the spontaneous exothermic nature of the adsorption process was favored at lower temperatures. The presence of anions, such as chloride, sulfate, carbonate, nitrate and phosphate, did not affect the adsorption capacity, while kinetic studies demonstrated that the arsenic adsorption process in Zr-modified activated carbon is not exclusively controlled by intraparticle diffusion." @default.
- W2792264532 created "2018-03-29" @default.
- W2792264532 creator A5002049570 @default.
- W2792264532 creator A5070618370 @default.
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- W2792264532 date "2018-04-01" @default.
- W2792264532 modified "2023-10-18" @default.
- W2792264532 title "Overview of As(V) adsorption on Zr-functionalized activated carbon for aqueous streams remediation" @default.
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- W2792264532 doi "https://doi.org/10.1016/j.jenvman.2018.01.072" @default.
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