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- W2760071133 abstract "Nanoporous geopolymer was synthesized with and without using Cetyl trimethylammonium bromide (CTAB) by condensing the mixture of metakaolin and alkali solution at a fixed ratio at room temperature. The surface area of CTAB-geopolymer was found to be more (216 m2/g) as compared to without CTAB added geopolymer (137 m2/g). The experimental results verified that the geopolymer could adsorb copper ions completely at lower concentrations and partially at higher concentrations. Pseudo second order model fits well at all the concentration from 55 to 1700 ppm as the values of the correlation coefficient lies between 0.96 and 0.99. Intraparticle diffusion model at the concentration 55 ppm explains that there is only boundary layer diffusion (instantaneous) and after this step, all the Cu ions are exchanged by the nanoporous geopolymer. At 120 ppm, intraparticle diffusion model shows multilinearity. Different adsorption models - Langmuir, Freundlich and Tempkin were also tested to evaluate the most appropriate model and it was found that adsorption follows Langmuir model. The adsorption capacity and pseudo second order rate constant is estimated to be 1.65 meq/g which is significantly higher than the fly ash based nonporous geopolymer." @default.
- W2760071133 created "2017-10-06" @default.
- W2760071133 creator A5023623283 @default.
- W2760071133 creator A5036225287 @default.
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- W2760071133 date "2017-12-01" @default.
- W2760071133 modified "2023-10-12" @default.
- W2760071133 title "CTAB modified large surface area nanoporous geopolymer with high adsorption capacity for copper ion removal" @default.
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- W2760071133 doi "https://doi.org/10.1016/j.clay.2017.09.013" @default.
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