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- W2030454026 abstract "Polyacrylamide-zeolite composite was prepared by direct polymerization of polyacrylamide in suspensions of β-zeolite. Phytic acid was then immobilized on the composite surface. Fourier transform infrared spectrometry (FT-IR), X-Ray Diffraction (XRD) and Thermal gravimetry (TG) techniques were employed to characterize the synthesized adsorbent. The adsorptive features of the composite and the modified composite were investigated for the removal of Pb 2+ from aqueous solution in view of dependency on pH, time, ion concentration, temperature, selectivity, kinetics and reusability. The adsorption isotherms were evaluated with reference to the Langmuir and Freundlich models. Thermodynamic of the system was calculated. ΔG<0 indicated that the adsorption process was spontaneous. Good compatibility of the adsorption kinetics to the pseudo-second-order model predicted that the rate-controlling step was a chemical sorption. The selectivity experiments showed that the adsorbents were selective toward Pb 2+ in the presence of Zn 2+ and Cd 2+ . The reusability of the adsorbent was tested for four regeneration cycles." @default.
- W2030454026 created "2016-06-24" @default.
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- W2030454026 date "2013-03-01" @default.
- W2030454026 modified "2023-09-25" @default.
- W2030454026 title "Modification of Polyacrylamide–β–Zeolite Composite by Phytic Acid for the Removal of Lead from Aqueous Solutions" @default.
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- W2030454026 doi "https://doi.org/10.2478/pjct-2013-0001" @default.
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