An improved method for the production of high purity silica from sugarcane bagasse ash obtained from a bioethanol plant boiler

Farirai, Fortunate; Mupa, Mathew; Daramola, Michael O.

doi:10.1080/02726351.2020.1734700

Cited by 11 publications

(4 citation statements)

References 30 publications

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“…However, Figure 4(c) shows a rather smaller proportion of irregular structures, including pores, which can be attributed to dye adsorption on the adsorbent surfaces with active sites occupied. The surface texture of SCBA is similar to that observed by others (Alves et al 2017;Farirai et al 2020). The bentonite surface morphology is also similar to that reported by others (Javed et al 2018;Carvalho et al 2019).…”

Section: Characterization Of Adsorbentssupporting

confidence: 89%

“…Adsorption can be enhanced by blending with bio-waste materials, which enhance or increase adsorbent mineral's capacity. Sugar cane bagasse ash (SCBA) is used in landfill and has negligible value (Huabcharoen et al 2017) but creates environmental and human health problems when handled improperly and disposed into the soil, air or water (Farirai et al 2020). Thus, agricultural wastes used as adsorbent reduce solid waste volumes and follow the principle of generating money from waste.…”

Section: Introductionmentioning

confidence: 99%

“…2 (Al-Essa 2018), 25.7(Toor et al 2015), and 13.9 m 2 /g(Carvalho et al 2019), and 1.5 m 2 /g for raw SCBA(Farirai et al 2020). The XRD results for bentonite and SCBA are shown in Figure2(a) and 2(b) respectively.…”

mentioning

confidence: 96%

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Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Adane

Adugna

Alemayehu

2021

Water Practice and Technology

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Adsorption offers efficient, cost-effective, and eco-friendly method for the treatment of dye-laden wastewater. This work presents, reactive red 198 (RR198) removal by adsorption using bentonite clay (BC) blended with sugar cane bagasse ash (SCBA). The adsorbent's surface morphologies, crystalline phase structures, functional groups, and specific surface before and after adsorption were examined using SEM, XRD, FTIR, and BET respectively. Central composite design (CCD) under response surface methodology (RSM) was applied to optimize independent and dependent variable values. The optimal parameters for RR198 removal using the blended adsorbent were 107 minutes contact time, 0.934 g/L adsorbent dose, and 15 mg/L initial dye concentration, and 85.2% RR198 removal efficiency was achieved. The sorption isotherms and kinetics were evaluated using various existing models. The Freundlich isotherm model (R2 = 0.95) and the pseudo-second-order equation best described the adsorption parameters and the RR198 adsorption kinetic mechanism, respectively. Desorption and reusability experiments in batch study confirmed that BC blended with SCBA can be used multiple times for dye removal from wastewater.

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Section: Characterization Of Adsorbentssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Adane

Adugna

Alemayehu

2021

Water Practice and Technology

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“…At the same time, sugarcane ash is a renewable source of silicon. Elemental analysis of sugar cane bagasse ash Fortunate et-al has revealed 71.49 wt% silica [8][9][10]. Another study reported on the sustainable and green synthesis of silver (Ag) nanoparticles with potential applications in medicine and the food industry as antibacterial agents.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Crystalline Silica from Sugarcane Bagasse Ash: Physico-Chemical Properties

2022

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Sugarcane bagasse South Africa is an agricultural waste that poses many environmental and human health problems. Sugarcane bagasse dumps attract many insects that harm the health of the population and cause many diseases. Sugarcane ash is a naturally renewable source of silica. This study presents for the first time the extraction of nanosilica from sugar cane bagasse ash using L-cysteine hydrochloride monohydrate acid and Tetrapropylammonium Hydroxide. The structural, morphological, and chemical properties of the extracted silica nanoparticles was cross examined using XRD, FTIR, SEM, and TGA. SEM analysis presents agglomerates of irregular sizes. It is possible to observe the structure of nanosilica formed by the presence of agglomerates of irregular shapes, as well as the presence of some spherical particles distributed in the structure. XRD analysis has revealed 2θ angles at 20, 26, 36, 39, 50, and 59 which shows that each peak on the xrd pattern is indicative of certain crystalline cubic phases of nanosilica, similar to results reported in the literature by Jagadesh et al. in 2015. The crystallite size estimated by the Scherrer equation based on the aforementioned peaks for ca-silica and L-cys-silica for the extracted particles had an average diameter of 26 nm and 29 nm, respectively. Furthermore, it showed a specific surface area of 21.6511 m2/g and 116.005 m2/g for ca-silica and L-cys silica, respectively. The Infrared (IR) spectra showed peaks at 461.231 cm−1, 787.381 cm−1 and 1045.99 cm−1 which corresponds to the Si~O~Si bending vibration, the Si~O~Si stretch vibration, and the Si~O~Si stretching vibration, respectively. This confirms the successful extraction of nanosilica from sugar cane bagasse ash. TGA analysis has revealed that the as received sugarcane bagasse has high loss on ignition (LOI) of 18%, corresponding to the presence of the unburnt or partial burnt particles, similar to results reported by Yadav et al. This study has shown that sugar cane bagasse ash is a natural resource of silica which should be harnessed for industrial purposes in south Africa.

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Mesoporous silica aerogels for sunflower oil refining and investigation of their adsorption performance

Soylu,

Özel,

Karakuzu Ikizler

et al. 2024

J Sol-Gel Sci Technol

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Involving a succession of oil refining stages for edible oil production, a notable constraint lies in the necessity to employ diverse adsorbents at various steps within these processes. This study investigates the synthesis of mesoporous silica aerogels from rice husk ash, comparing their efficacy in physical sunflower oil refining with earth clay (Bentonite) and commercial silica (Trisyl). Tetraethyl orthosilicate (TEOS) impact during aging was analyzed using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and N2 adsorption-desorption analyzer to examine alterations in the structure of silica aerogels. The surface areas of TEOS-doped silica aerogel (TSA) and non-TEOS-doped silica aerogel (NTSA) were 296.18 and 267.06 m²/g. Mesoporous silica aerogels were evaluated for their ability to reduce free fatty acids (FFA), peroxide value (PV), phosphorus, and color pigments in sunflower oil. TSA and NTSA demonstrated significant FFA removal, with TSA at 3 wt.% achieving the highest performance of 32.2%. TSA also effectively reduced PV and phosphorus compared to NTSA, Bentonite and Trisyl, exhibiting performance similar to Bentonite in the bleaching process. TEOS-doped silica aerogels have shown promise as adsorbents for impurity removal in sunflower oil and has emerged as the potential adsorbent that can comprehensively and effectively meet the requirements of many edible oil physical refining applications in a singular step. Graphical Abstract

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An improved method for the production of high purity silica from sugarcane bagasse ash obtained from a bioethanol plant boiler

Cited by 11 publications

References 30 publications

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Green Synthesis of Crystalline Silica from Sugarcane Bagasse Ash: Physico-Chemical Properties

Mesoporous silica aerogels for sunflower oil refining and investigation of their adsorption performance

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