期刊
CHEMICAL ENGINEERING JOURNAL
卷 192, 期 -, 页码 67-76出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.03.057
关键词
Adsorption; Biosorbent; Brown algae; Chemical treatment; Dye removal
资金
- Student Affairs of Isfahan University of Technology, Isfahan Water and Sewage Company
- Isfahan Municipality
The adsorption of acid orange II (AO7) dye from aqueous solution was examined onto untreated and chemically modified forms (treated with (i) propylamine, (ii) acidic methanol, (iii) formaldehyde and (iv) formic acid with formaldehyde) of brown alga, Stoechospermum marginatum. The adsorption was studied as a function of initial solution pH (2.0-10.0), initial dye concentration (30-90 mg/L), contact time (5-60 min) and biomass dosage (0.2-2.2 g/L) at constant temperature and agitation speed. The kinetic data were well described with the pseudo-second-order model. The results revealed that amine functional groups were mainly responsible for the adsorption of acid orange II dye. The modification of biomass with propylamination enhanced the dye adsorption capacity about two times of the untreated algal biomass. These findings were confirmed by Fourier transform infrared (FT-IR) spectroscopy. (C) 2012 Elsevier B.V. All rights reserved.
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