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Preparation and characterisation of biosilica from teff ( eragrostis tef ) straw by thermal method
- Source :
- Materials Letters. 206:13-17
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Biosilica was synthesised via thermal method from teff ( Eragrostis tef ) straw, an African agricultural waste, at three different ashing temperatures. Raw teff, characterised by various method, was subjected to thermal decomposition in static air in an electric muffle furnace at various temperatures for 2 h. X-ray fluorescence (XRF) characterization technique analysis showed thermally treated teff straw ash contains significant amount of biosilica having purity of 85, 91.2 and 91.8% for samples obtained at ashing temperatures of 500 °C, 700 °C, and 900 °C, respectively. Teff straw biosilica samples were also characterised by various sophisticated techniques: FE-SEM/EDX, FTIR), XRD and TEM. Prepared biosilica samples performed well for adsorptive removal of pyridine from aqueous solution. Present experimental results show that teff straw is highly-potent renewable source for biosilica when compared with other materials reported in the literature under similar conditions.
- Subjects :
- Aqueous solution
Materials science
biology
Mechanical Engineering
Thermal decomposition
02 engineering and technology
Eragrostis
010501 environmental sciences
Straw
021001 nanoscience & nanotechnology
Condensed Matter Physics
biology.organism_classification
01 natural sciences
Ashing
Mechanics of Materials
General Materials Science
Fourier transform infrared spectroscopy
Muffle furnace
0210 nano-technology
Thermal analysis
0105 earth and related environmental sciences
Nuclear chemistry
Subjects
Details
- ISSN :
- 0167577X
- Volume :
- 206
- Database :
- OpenAIRE
- Journal :
- Materials Letters
- Accession number :
- edsair.doi...........fc7a16d2429fa0f9a7c2136c99a39c09