Properties and application of cellulose membranes with graphene oxide addition for removal of heavy metals from aqueous solutions
The paper presents results of research on the properties and application of cellulose-based (CEL) composite membranes with graphene oxide (GO) addition for the removal of heavy metals from aqueous solutions. Composite membranes (GO/CEL) were prepared by phase inversion from CEL solutions in 1-ethyl-...
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Veröffentlicht in: | Desalination and water treatment 2018-06, Vol.117, p.66-77 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The paper presents results of research on the properties and application of cellulose-based (CEL) composite membranes with graphene oxide (GO) addition for the removal of heavy metals from aqueous solutions. Composite membranes (GO/CEL) were prepared by phase inversion from CEL solutions in 1-ethyl-3-methylimidazolium acetate (EMIMAc) containing addition of GO in the form of nanoparticle dispersion in N,N-dimethylformamide (DMF). The paper demonstrates how the amount of GO addition influences the structure and physicochemical and separation properties of GO/CEL composite membranes. Infrared spectroscopy, thermal analysis, X-ray crystallography and scanning electron microscopy were used in structural studies. Investigations of transport properties have shown that the introduction of 2%, 10% and 20% of GO into the composite membrane improves its transport properties, resulting in a 2-, 5- and 10-fold increase in permeate flux. The paper also investigated the use of GO/CEL composite membranes in removal of selected heavy metals (lead, zinc, cobalt and nickel) from aqueous solutions determined by atomic absorption spectrometry. It was found that ~100% removal of heavy metals is obtained for membranes containing 2%, 10% and 20% of GO in the cellulose matrix. |
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ISSN: | 1944-3986 |
DOI: | 10.5004/dwt.2018.22094 |