Compressive Alginate Sponge Derived from Seaweed Biomass Resources for Methylene Blue Removal from Wastewater

Low cost fabrication of water treatment polymer materials directly from biomass resources is urgently needed in recent days. Herein, a compressive alginate sponge (AS) is prepared from seaweed biomass resources through a green two-step lyophilization method. This material is much different from conv...

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Bibliographic Details
Published in:Polymers 2019-06, Vol.11 (6), p.961
Main Authors: Shen, Xiaojun, Huang, Panli, Li, Fengfeng, Wang, Xiluan, Yuan, Tongqi, Sun, Runcang
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Algae
Alginates
Aqueous solutions
Biomass
Contaminants
Dyes
Environmental impact
Environmental protection
Fourier transforms
Low cost
Membrane separation
Methylene blue
Morphology
Porous materials
Radiation
Seaweeds
Sodium
Spectrum analysis
Textiles
Wastewater treatment
Water treatment
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Summary:Low cost fabrication of water treatment polymer materials directly from biomass resources is urgently needed in recent days. Herein, a compressive alginate sponge (AS) is prepared from seaweed biomass resources through a green two-step lyophilization method. This material is much different from conventional oven-, air-, vacuum-dried alginate-based adsorbents, which show limitations of shrinkage, rigidness, tight nonporous structure and restricted ions diffusion, hindering its practical applications, and was used to efficiently remove methylene blue (MB), a main colorful contaminant in dye manufacturing, from wastewater. The batch adsorption studies are carried out to determine the impact of pH, contact time and concentration of dye on the adsorption process. The maximum adsorption capacity can be obtained at 1279 mg g , and the shape-moldable AS can be facilely utilized as a fixed-bed absorption column, providing an efficient approach for continuous removal of MB within a short time. It is also important that such a compressive AS can be regenerated by a simple squeezing method while retaining about 70% capacity for more than ten cycles, which is convenient to be reused in practical water treatment. Compressive AS demonstrates its merits of high capability, large efficiency and easy to recycle as well as low cost resources, indicating widespread potentials for application in dye contaminant control regarding environmental protection.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym11060961