Extraction of Silica from Rice Straw Using Alkaline Hydrolysis Pretreatment

Bakar, Ayu Haslija Abu; Carey, Chong Jia Ni

doi:10.1088/1757-899x/778/1/012158

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…The percentages ranged from 49.5 to 84.5 [36] and 59.38 to 85.85% [35]. The maximum documented silica gel production for other feedstocks, including palm shell, was lower than the present precursor with the best silica gel yield 92% [54], corn cob 47% [19], bamboo Leaf 79.38% [49], sugarcane leaf 80.50% [55], wheat straw (7.00% [21], and rice straw 76.70% [56]. The highest yield from the TS was, however, only slightly higher than that of sugarcane bagasse and rice husk, both of which have yields greater than 95% [57] and 96% [13,46], respectively.…”

Section: Yield Of Silica Gelmentioning

confidence: 64%

Characteristic investigations on bio-silica gel prepared from teff (Eragrostis tef) straw: effect of calcination time

Tessema,

Gonfa,

Hailegiorgis

et al. 2023

Mater. Res. Express

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Bio-based silica gel is having many commercial significances in various sectors, such as medical, cleansing agents in industries, laboratory analysis, cosmetics, food additives, and so forth. In view of crucial requirements, this study aimed to synthesize and characterize the silica gel from Ethiopia’s primary post-harvest biomass residue, known as teff straw. The present study has been emphasized to investigate on the influence of calcination time for teff straw ash [Joshi et al 2022 Investigation of bamboo leaves as an alternative source of silica: extraction, characterization and its application as an adsorbent for methylene blue sequestration Chem. Select. 7, e202200011] preparation between 2 to 5 h. Further, the specific surface area of the resultant TSA samples was examined for preliminary understandings of processing time. By adopting the standard procedures through template-mediated sol–gel process, acquired TSA samples were subjected to treatment with NaOH to result sodium silicate solution and the amorphous silica. From the findings, it was apparent that the yield of silica gel has significantly influenced by calcination time. Accordingly, the maximum yield (90.0%) was attained at the calcination time of 4 h at 900 °C. Further, physiochemical and morphological characteristics of acquired silica gels were ascertained using sophisticated instrumental techniques such as BET, FTIR, XRD, SEM, and EDX. The XRD analysis of the crystallographic characteristics showed that the silica extracted from TSA at 900 °C for 2, 3, 4, and 5 h was found to be in amorphous state. The surface morphological studies of silica gel samples have been carried out using SEM studied. the EDX spectra showed the negligible amount of other impurities, nevertheless a larger amount of silica was found with highest purity of 99.77% e silica gel was obtained in TSA calcinated at 3 h. FTIR spectrum confirmed the presence of siloxane (Si–O–Si) vibrations of amorphous silica that are responsible for the strong bend observed at 1070 cm−1. It was found that the silica gel prepared at 3 h of calcination time had the largest specific surface area of 739.242 m2 g−1, pore volume of 0.32 cm3 g−1, and a pore diameter of 1.68 nm.

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Section: Yield Of Silica Gelmentioning

confidence: 64%

Characteristic investigations on bio-silica gel prepared from teff (Eragrostis tef) straw: effect of calcination time

Tessema,

Gonfa,

Hailegiorgis

et al. 2023

Mater. Res. Express

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“…The co-purified extraction process of nano-cellulose [34] Rice straw Alkaline hydrolysis pre-treatment [35] agriculture waste. HCl solution was used during the acid leaching process for agriculture waste and was calcined at 600 °C to produce amorphous silicon [46].…”

Section: Pineapple Peelsmentioning

confidence: 99%

Potential of nanosilicon dioxide extraction from silicon-rich agriculture wastes as a plant growth promoter

Ibrahim¹,

Meng²,

Alipour³

et al. 2022

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Agriculture waste has attracted attention as a potential source to produce raw material silicon dioxide, either crystalline (pyrophyllite) or amorphous form (geothermal sludge). It is an unwanted waste produced as a desired result of agricultural activities. Nanosilicon dioxide has undoubtedly gained eager interest in many vital industries. It is renowned for positively enhancing outstanding performance due to tuneable properties over its bulk counterpart. Silicon dioxide scientifically demonstrates a unique ability to convert efficiently into economic value from silicon-rich agriculture waste. Thus, a noble extraction from silicon-rich waste is undoubtedly gaining enormous attention. However, adequate knowledge on local optimisation of nanosilicon dioxide extraction from silicon-rich agriculture waste is lacking. Specific aims of this comprehensive review mainly highlighted a synthesis method of potential nanostructured silicon dioxide from agriculture waste and their potential applications for plant growth promoters. Reverse microemulsion, chemical vapour condensation, solid gelation, and mechanochemical are preferred methods that were typically specified to focus this comprehensive review critically. Optimisation of nanosilicon dioxide can be achieved precisely via the ideal combination of solid gelation and a high-energy ball mill process. Silicon dioxide is undoubtedly an effective agent as a plant growth promoter to overcome biotic and abiotic factors such as heavy metal uptake and translocation, inhibit pathogenic fungi, improve the antioxidant system, and mitigate various stress factors.

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