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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۲، شماره ۱۱، صفحات ۳۶۰۱-۳۶۲۳
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عنوان انگلیسی Novel Low-Cost Magnetic Clinoptilolite Powders/Granules for the Removal of Crystal Violet in Single and Binary Systems
چکیده انگلیسی مقاله Novel magnetic adsorbents of Clinoptilolite/Fe3O4 (Clin/Fe3O4) nanocomposite powders and Alginate/Clinoptilolite/Fe3O4 (Alg/Clin/Fe3O4) nanocomposite granules were synthesized to efficient removal of the cationic crystal violet (CV) dye in single and CV/methylene blue (MB) binary systems. The prepared adsorbents were characterized by FT-IR, XRD, SEM, EDX, dot mapping, and BET analysis. Adsorption tests showed that Clin/Fe3O4 and Alg/Clin/Fe3O4 had high affinity toward CV removal at 94.32% and 92.35%, in the single system and 84.19% and 80.23%, in the binary system, respectively. Based on the findings, pH was the most effective variable in the elimination process and the highest yield was obtained at pH 8 for both adsorbents. The equilibrium data followed the Langmuir model (R2 > 0.9) based on which the maximum adsorption capacity (qmax) using Clin/Fe3O4 and Alg/Clin/Fe3O4 was determined as 44.662 mg/g and 16.528 mg/g, respectively in the single system and it was computed to be 15.797 mg/g and 11.476 mg/g, respectively in the binary system. The kinetic data fitted well to the pseudo-second-order model in both systems. The adsorption process was exothermic and thermodynamically spontaneous. Moreover, Clin/Fe3O4 and Alg/Clin/Fe3O4 adsorbents showed 91.43% and 82.01% recyclability over the desorption tests, thus leading to promising and green-based adsorbents for the removal of dyes. The Electrical Conductivity (EC) of MB, CV, and CV/MB solutions and also real wastewater sampled from a dyeing unit were measured before and after treatment and the results showed that the EC of all samples was reduced.
کلیدواژه‌های انگلیسی مقاله Crystal violet,Clinoptilolite,Granules,Binary System,Electrical conductivity
نویسندگان مقاله Maryam Noori |
Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, I.R. IRAN

Maryam Tahmasebpoor |
Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, I.R. IRAN

نشانی اینترنتی https://ijcce.ac.ir/article_704971_8478ecaae16f2826ce9970dab9cf5d20.pdf
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