Journal
JOURNAL OF CLEANER PRODUCTION
Volume 137, Issue -, Pages 189-194Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2016.07.068
Keywords
Sargassum horneri; Brown seaweed; Magnetic adsorbent; Microwave synthesis; Magnetic iron oxide
Categories
Funding
- Grant Agency of the Czech Republic [13-13709S]
- Ministry of Education, Youth and Sports of the Czech Republic [LO1305, LD14066]
- COST [TD1203]
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Adsorption of five water-soluble dyes of different chemical structures from aqueous solutions was investigated using magnetically responsive brown algae Sargassum horneri. The simple magnetic modification. of Sargassum biomass employing microwave-synthesized iron oxide nano- and microparticles enabled rapid and selective separation by means of external magnetic field. The biosorption was studied in a batch system under different conditions. Time necessary to reach equilibrium was less than 2 h for all tested dyes. The adsorption equilibrium data were analyzed by Langmuir and Freundlich isotherm models. The highest maximum adsorption capacity was observed for acridine orange (193.8 mg/g); the lowest one for malachite green (110.4 mg/g). The sorption kinetics could be described by pseudo-second-order model, and the thermodynamic studies indicated exothermic nature of biosorption process in the temperature range studied. It can be concluded that Sargassum homeri biomass, exhibiting a satisfactory efficacy in dye removal, can be used as an effective, low-cost adsorbent (C) 2016 Elsevier Ltd. All rights reserved.
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