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• W3021850462 abstract "Abstract Green iron nanoparticles (G-nZVI) were synthesized in situ by adding grape-seed extracts and Fe 2+ solution simultaneously. The performances for the removal of Cr(VI) were compared in a homogeneous system by original G-nZVI (in suspension) with in a heterogeneous system by treated G-nZVI. The characterization of TEM, SEM, XRD, FTIR and XPS show that G-nZVI is the formation of Fe°-iron oxide core-shell nanoparticles with organic matters in the extracts as capping/stabilizing agents. The same excellent performances on the removal of Cr(VI) were observed in the both systems and the adsorption capacity was from 78.3 to 166.7 mg (Cr)·g −1 (Fe) with the increase of initial Fe 2+ concentrations. The pseudo second-order model described the adsorption process excellently and both pseudo first-order and pseudo second-order models fit the reduction process well. It illustrated that the reaction included prompt adsorption and simultaneous redox process. Moreover, the results of thermodynamics study (ΔG° < 0, ΔH° > 0, ΔS° > 0) revealed that the adsorption was a spontaneous and endothermic process. It is obvious that the systhesis of original G-nZVI in the homogeneous system is more simple, rapid, cost-effective and suitable for in situ uses. It holds a great potential for remediation of soil and water." @default.
• W3021850462 created "2020-05-13" @default.
• W3021850462 creator A5005688217 @default.
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• W3021850462 date "2020-04-30" @default.
• W3021850462 modified "2023-10-07" @default.
• W3021850462 title "The comparative study of a homogeneous and a heterogeneous system with green synthesized iron nanoparticles for removal of Cr(VI)" @default.
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• W3021850462 doi "https://doi.org/10.1038/s41598-020-64476-5" @default.
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