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Synthesis and characterization of magnetic nanocomposite of chitosan/SiO2/carbon nanotubes and its application for dyes removal
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.ORCID-id: 0000-0002-7283-4675
2017 (engelsk)Inngår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 145, s. 105-113Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The adsorption characteristics of Direct Blue 71 (DB71) and Reactive Blue 19 (RB19) from aqueous solution onto novel magnetic nanocomposite of Chitosan/SiO2/CNTs (MNCSC) have been investigated. The morphology of MNCSC was characterized by vibrating sample magnetometer (VSM), field-emission scanning electron microscopy (FESEM), X-ray Diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The effect of initial dye concentration, contact time, adsorbent dosage and initial pH as experimental parameters on the removal of dyes were investigated. The adsorption experiments indicated the maximum adsorption capacity occurred at pH 6.8 for DB71 and pH 2.0 for RB19. The experimental data were analyzed by isotherm models and equilibrium results were fitted well with the Langmuir isotherm model and the maximum adsorption capacity of the MNCSM was determined to be 61.35 mg/g for DB71 (R-2 = 0.996) and 97.08 mg/g for RB19 (R-2 = 0.998). Adsorption data were analyzed with three kinetics models and pseudo second-order equation could best describe for adsorption of dyes. Finally, the thermodynamic parameters were determined. (C) 2017 Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
Elsevier, 2017. Vol. 145, s. 105-113
Emneord [en]
Chitosan, Magnetic, Nanocomposite, Adsorption, Dye removal
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-204064DOI: 10.1016/j.jclepro.2017.01.046ISI: 000394062300011Scopus ID: 2-s2.0-85012307929OAI: oai:DiVA.org:kth-204064DiVA, id: diva2:1085703
Merknad

QC 20170330

Tilgjengelig fra: 2017-03-30 Laget: 2017-03-30 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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