期刊
CARBOHYDRATE POLYMERS
卷 157, 期 -, 页码 1568-1576出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.11.037
关键词
Chitosan; Zeolite; Flocculation; Adsorption; Kinetic rate
资金
- University of Malaya Research Grant [RP034A-15AET]
- Fundamental Research Grant Scheme [FP026-2014B]
- Ministry of Higher Education Malaysia through High Impact Research Grant [UM.C/625/1/HIR/MOHE/ENG 40]
- Post Graduate Research Fund [PG048-2013B]
A chitosan/polyvinyl alcohol (PVA)/zeolite composite was fabricated in this study. The composite was analyzed through field emission scanning electron microscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis, and weight loss test. FTIR and XRD results revealed a strong interaction among chitosan, PVA, and zeolite. Weight loss test results indicated that the composite was stable in acidic and basic media. Congo red was removed through flocculation, and the removal rate was 94% at an initial concentration of 100 mg/L for a dose of 1 g/L. The removal rate of methyl orange was controlled by adsorption at an initial concentration of less than 100 mg/L. Flocculation occurred at high concentrations. The removal rate was also 94% at an initial concentration of 500 mg/L for a dose of 5 g/L. The adsorption behavior of the composite for the removal of methyl orange and Cr(VI) was described by using a pseudo-second-order kinetic model. The adsorption capacity of the composite for Cr(VI) was 450 mg/g. Therefore, the synthesized composite exhibited versatility during the removal of dyes and heavy metals. (C) 2016 Elsevier Ltd. All rights reserved.
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