2018
DOI: 10.1080/21870764.2018.1539210
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Rice husk/rice husk ash as an alternative source of silica in ceramics: A review

Abstract: Use of waste or by-products from different industries and the agricultural sector has received increasing attention in the scientific, technology, ecological, economic and social spheres in recent years. Rice husk (RH) is a by-product of rice milling and rice husk ash (RHA) is generated by combustion in a separate boiler. Both RH and RHA are abundantly accessible in rice growing countries such as China, India, Brazil, the USA, and Southeast Asia. RH has therefore been recycled by burning it for energy producti… Show more

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Cited by 250 publications
(99 citation statements)
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“…Poor handling of waste often results in emission of methane and leachate while open burning by the farmers generate CO 2 and other local pollutants. Rice husk is one of the most widely available agricultural wastes in many rice producing countries of the world (Hossain et al 2018). In every 100 kg of rice processed, ≈ 20 kg of rice husk waste is generated (Ghosal and Moulik 2015).…”
Section: Introductionmentioning
confidence: 99%
“…Poor handling of waste often results in emission of methane and leachate while open burning by the farmers generate CO 2 and other local pollutants. Rice husk is one of the most widely available agricultural wastes in many rice producing countries of the world (Hossain et al 2018). In every 100 kg of rice processed, ≈ 20 kg of rice husk waste is generated (Ghosal and Moulik 2015).…”
Section: Introductionmentioning
confidence: 99%
“…After burning, RH produces RHA that comprises of around 90% to 95% silica based on regions of production . Therefore, RHA can be a potential source for production of silica that not only reduce the dependency of extraction of silica from virgin resources, like quartz, granite, and gravel sand stone, but also solve the disposal problem of waste materials . This silica is reported to be used for production of silicon‐based material such as concrete, laboratory glass wares, absorbents silicon carbide, silicon nitride, and zeolites .…”
Section: Introductionmentioning
confidence: 99%
“…5 Therefore, RHA can be a potential source for production of silica that not only reduce the dependency of extraction of silica from virgin resources, like quartz, granite, and gravel sand stone, but also solve the disposal problem of waste materials. 6 This silica is reported to be used for production of silicon-based material such as concrete, laboratory glass wares, absorbents silicon carbide, silicon nitride, and zeolites. [7][8][9] Silica extracted from RHA can also be used for production of metallurgical grade silicon (MG-Si) and solar grade silicon (purity level equivalent to 99.99% and 99.9999%, respectively) reported by several authors.…”
Section: Introductionmentioning
confidence: 99%
“…RHA contain high amount (>85 wt%) of amorphous silica and less amount of different alkali oxide. However, with proper alkali or acid treatment of RHA, SiO 2 content can increase above 98 wt% in the system . RH and its derived silica has a large spectrum of applicability to produced different advanced ceramic materials such as porous ceramic, forsterite, mullite, cordierite, wollastonite, silicon carbide, silicon nitride, and silica aerogel …”
Section: Introductionmentioning
confidence: 99%