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• W2893771047 endingPage "210" @default.
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• W2893771047 abstract "Abstract Activated carbon (AC) is a widely used adsorbent with a limited selectivity for chromium species. In this study, polysulfide rubber (PSR) polymer was synthesized, characterized by FTIR, and coated on F400 granular AC to obtain AC-PSR. The material properties of this composite adsorbent were investigated using SEM, TEM, EDS, TGA, BET isotherm, and XPS. The effectiveness of AC-PSR for aqueous Cr(VI) removal was investigated, and compared against virgin AC. The results showed that despite a 23% decrease in the surface area of AC after PSR coating, AC-PSR had a higher capacity for Cr(VI) adsorption. Adsorption followed a pseudo-second-order biphasic diffusion model for both AC and AC-PSR. The reaction rate constants showed that despite faster initial kinetics between AC and Cr(VI) during the film diffusion step, AC-PSR exhibited faster kinetics during the intraparticle diffusion step. The Langmuir isotherm model was found to be the best model to describe the experimental data, which showed a higher adsorption capacity for AC-PSR (QM,AC = 3.472 mg/g vs. QM,AC-PSR = 8.929 mg/g) and a stronger binding between Cr(VI) and AC-PSR (bA,AC = 0.391 L/mg vs. bA,AC-PSR = 0.696 L/mg). Regenerated AC-PSR showed an 8% increase in Cr(VI) removal efficiency after the first cycle, and then maintained a ∼98% Cr(VI) removal for three additional successive cycles." @default.
• W2893771047 created "2018-10-05" @default.
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• W2893771047 date "2019-01-01" @default.
• W2893771047 modified "2023-09-26" @default.
• W2893771047 title "Synthesis, characterization, and kinetic study of activated carbon modified by polysulfide rubber coating for aqueous hexavalent chromium removal" @default.
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• W2893771047 doi "https://doi.org/10.1016/j.jiec.2018.09.028" @default.
• W2893771047 hasPublicationYear "2019" @default.
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