TY - JOUR ID - 93185 TI - Adsorption of Anionic Dyes on Poly(N-vinylpyrrolidone) Modified Bentonite JO - Physical Chemistry Research JA - PCR LA - en SN - 2322-5521 AU - Heddi, Djawhar AU - Benkhaled, Amal AU - Boussaid, Abdelhak AU - Choukchou-Braham, Esma AD - Laboratoire de Recherche sur les Macromolécules (LRM), Université de Tlemcen, Algérie AD - Laboratoire de Recherche Toxicomed, Université de Tlemcen, Algérie AD - Laboratoire de Recherche Toxicomed, Université de Tlemcen, Algérie Y1 - 2019 PY - 2019 VL - 7 IS - 4 SP - 731 EP - 749 KW - Poly(N-vinylpyrrolidone) KW - Bentonite KW - Composite KW - Telon KW - Adsorption DO - 10.22036/pcr.2019.179510.1625 N2 - A composite based on poly(N-vinylpyrrolidone) (PVP) and sodium bentonite was prepared by a simple method. Structural characterizations of the bentonite and the composite were performed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The TGA analysis showed a low loading of the polymer in the bentonite. XRD analysis confirmed a modification in the structure of the bentonite without affecting its crystalline nature. The prepared composite was used for the removal of Telon-Blue, Telon-Orange and Telon-Red dyes in aqueous solution. Batch adsorption experiments were used to study the effect of the experimental parameters on the dyes equilibrium adsorption. At 23 °C, the maximum adsorption capacity obtained for the Telon-Blue dye was 36.6 mg.g-1 (73.10 %) after 120 min equilibrium time, 28.8 mg.g-1 (59.57 %) after 40 min for Orange-Telon, whereas, with the Telon-Red, we obtained 24.6 mg.g-1 (50 %) after 60 min. The kinetic data of the adsorbed dyes were defined by the pseudo second order and the equilibrium data were fitted well with the Freundlich isotherm. The thermodynamic parameters were determined for Telon-Bleu dye, as the more important adsorption capacity values were achieved with it. The adsorption process is non spontaneous and exothermic. UR - https://www.physchemres.org/article_93185.html L1 - https://www.physchemres.org/article_93185_4987efdcf83988b1d4aa133e55f8b32f.pdf ER -