Extraction of Silica from Sugarcane Bagasse, Cassava Periderm and Maize Stalk: Proximate Analysis and Physico-Chemical Properties of Wastes
No Thumbnail Available
Date
2019
Authors
Adebisi, J. A.
Agunsoye, J. O.
Bello, S. A.
Kolawole, F. O.
Ramakokovhu, M. M.
Daramola, M. O.
Hassan, S. B.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Indiscriminate disposal and burning of agricultural
wastes constitute environmental pollution and increase
in greenhouse gases emission. Renewable nature and availability
of agricultural wastes has stimulated researchers to
explore “wastes to wealth creation” policy. Three agricultural
wastes were investigated for potential use for silica
production. Proximate analysis, thermogravimetric analysis
(TGA), compositional analysis, calcination and statistical
analysis were carried out to quantify the ash and establish
presence of silica. Response surface methodology was used
for statistical analysis of CP calcination. The proximate analysis
showed that sugarcane bagasse, cassava periderm and
maize stalk ash contents are 1.73, 4.93 and 4.80%, respectively.
The EDS results showed that their ashes contain 5.22,6.10 and 7.01% silicon, respectively. XRF results revealed
presence of 38% SiO2
in CP ash. XRD revealed presence of
silica and silicates phases. TGA shows that their calcination
temperature must be above 500 °C. Numerical optimization
of CP calcination gave optimum condition of 700 °C for
270 min to attain 82% weight loss. Calcination regression
equation exhibited high coefficient of determination (
R2) of
0.8225. The three wastes contain silica and silicates from
which silica could be extracted. Calcination temperature and
time have been established to be significant in ash content
enhancement.
Description
Keywords
Sugarcane bagasse, Maize stalk, Cassava periderm, Agricultural wastes, Proximate analysis, Calcination