Production and Optimization of Bio-Based Silica Nanoparticle from Teff Straw (Eragrostis tef) Using RSM-Based Modeling, Characterization Aspects, and Adsorption Efficacy of Methyl Orange Dye

The brown teff straw was utilized in this study to produce silica using the sol-gel technique. After pretreatment, the raw material of brown teff straw was characterized. The data were analyzed using the central composite design and response surface technique, and four independent parameters, namely...

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Bibliographic Details
Published in:Journal of chemistry 2022-01, Vol.2022, p.1-15
Main Authors: Amibo, Temesgen Abeto, Beyan, Surafel Mustefa, Damite, Tsegaye Markos
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Agricultural pollution
Agricultural production
Anabolic steroids
Analysis
Aqueous solutions
Ashes
Azo compounds
Biomass
Caustic soda
Dyes
Grain
Investigations
Laboratories
Mineralogy
Moisture content
Nanoparticles
Optimization
Raw materials
Response surface methodology
Rotation
Silica
Silicon
Silicon dioxide
Sodium
Sol-gel processes
Spectrum analysis
Variables
Water treatment
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Summary:The brown teff straw was utilized in this study to produce silica using the sol-gel technique. After pretreatment, the raw material of brown teff straw was characterized. The data were analyzed using the central composite design and response surface technique, and four independent parameters, namely, temperature, NaOH concentration, rotational speed, and extraction time, were evaluated for process optimization. Before extracting silica with an alkaline solution, the silica content in the ash was determined using an AAS spectrometer. The silica content of teff straw ash is around 92.89%. The ash was treated with NaOH solution in the concentrations range of 1 M to 3 M (0.5 M interval). The extraction time varied at intervals of 55, 70, 85, 100, and 115 minutes. Temperatures were changed using magnetic stirrer equipment in the range of 80°C to 100°C (5°C interval). At 350 rpm, 400 rpm, 450 rpm, 500 rpm, and 550 rpm, the rotating speed was adjusted. The best extraction conditions for amorphous silica were 1.50 M NaOH, 109.99 min, 94.98°C, and a rotating speed of 499.57 rpm, with a maximum yield of 85.85%. XRD and FTIR analyses were used to assess the physicochemical characteristics of the extracted silica. The aqueous solutions of methyl orange were used to test the adsorption efficiency of silica. The percent of removal efficiency for methyl orange was 90.48%.
ISSN:2090-9063
2090-9071
DOI:10.1155/2022/9770520