Rice Husk and Its Applications: Review

Babaso, Patil Nita; Sharanagouda, H.

doi:10.20546/ijcmas.2017.610.138

Cited by 58 publications

(14 citation statements)

References 76 publications

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“…Untreated rice husk burning often produces ash with high unburnt carbon content due to incomplete burning as well as the melting of alkaline minerals in ash which entrap and complicate the fixed carbon to undergo further oxidization 8,9 . This kind of ash is quite different from common rice husk ash (RHA), so it is then called rice husk black ash (RHBA), which is still rare to be exploited 10–14 . Simply, RHA has a grayish to white color while RHBA's color is black to grayish.…”

Section: Introductionmentioning

confidence: 99%

Influences of pretreatment, extraction variables, and post treatment on bench‐scale rice husk black ash (RHBA) processing to bio‐silica

Steven

Restiawaty

Pasymi

et al. 2021

Asia-Pacific J Chem Eng

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Abundant availability and large silica content in rice husk black ash (RHBA) make the use of it very interesting to study. Many works only deal with lab‐scale rice husk ash extraction while the studies on bench‐scale RHBA extraction are still limited. This study, hence, presents the influence of pretreatment, extraction variables, and posttreatment on bench‐scale RHBA processing to bio‐silica. The pretreatment through acid leaching was carried out using HCl. The extraction was implemented under varying process variables such as alkaline‐to‐feed ratio (RA/F), extraction duration, and acid precipitation agent. According to this study, the highest extraction yield up to 98% was gained under RA/F 6 g/g and 1‐h extraction. The amorphous bio‐silica had an asymmetric siloxane bond and white appearance with a purity exceeding 95% and surface area up to 406.98 m2/g. Meanwhile, precipitation under HCl and H2SO4 had little impact on product purity and surface area. This study exhibits that acid leaching is executed to release mineral impurities but is still not sufficient to remove the remaining carbon content in bio‐silica. However, the contribution of refining process is able to do so. Moreover, the produced bio‐silica is suitable for adsorbent purposes which could adsorb up to 83.5% of 3‐monochloropropanediol compound.

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Section: Introductionmentioning

confidence: 99%

Influences of pretreatment, extraction variables, and post treatment on bench‐scale rice husk black ash (RHBA) processing to bio‐silica

Steven

Restiawaty

Pasymi

et al. 2021

Asia-Pacific J Chem Eng

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“…We first proposed to precipitate titanium ion-exchangeable silicates on products of thermochemical processing of rice husk [49]. Rice husk contains a large amount of silicon dioxide and is a large-tonnage waste of agricultural production [50]. In accordance with the technology proposed, at the first stage of the synthesis, rice husks are treated with acidic titanyl sulfate with weak heating.…”

Section: Introductionmentioning

confidence: 99%

Titanium Silicates Precipitated on the Rice Husk Biochar as Adsorbents for the Extraction of Cesium and Strontium Radioisotope Ions

Zhuravlev¹

2019

Colloids and Interfaces

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The aim of the work was the development of cheap and effective adsorbents based on titanium silicates deposited on the products of thermochemical processing of rice husk to extract cesium and strontium radioisotopes from aqueous media. Synthesis of adsorbents was carried out using the cheapest and widely used titanium water-soluble reagent, titanium sulfate (an intermediate product of white rutile pigment production), as feedstock. After treatment with titanium sulfate and neutralization, hydrothermal treatment was carried out in various ways. The traditional method of processing in an autoclave was used, as well as the blowing at different temperatures by steam. The distribution coefficients and the adsorption capacity for cesium and strontium ions on these sorbents were studied. Along with the chemical composition of adsorbents obtained by those ways, the type and the temperature of hydrothermal treatment also affected the adsorption properties. It was found that the adsorbent obtained by hydrothermal treatment in an autoclave has the highest degree of cesium ions extraction (Kd = 27,500). The highest degree of strontium ions extraction (Kd = 2,095,000) has an adsorbent obtained by hydrothermal treatment with water vapor blowing.

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“…High silica content has been observed in biomass wastes (Oladeji 2010 ; Shen et al 2014 ; Zemnukhova et al 2015 ; Hossain et al 2018 ; Dhinasekaran et al 2020 ). Rice husk ash contains 83–98% of silica (Saxena et al 2009 ; Babaso and Sharanagouda 2017 ). Corn is another major crop plant with 785 million tons produced annually in this world.…”

Section: Introductionmentioning

confidence: 99%

Plant-derived silica nanoparticles and composites for biosensors, bioimaging, drug delivery and supercapacitors: a review

et al. 2020

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Rice Husk and Its Applications: Review

Cited by 58 publications

References 76 publications

Influences of pretreatment, extraction variables, and post treatment on bench‐scale rice husk black ash (RHBA) processing to bio‐silica

Influences of pretreatment, extraction variables, and post treatment on bench‐scale rice husk black ash (RHBA) processing to bio‐silica

Titanium Silicates Precipitated on the Rice Husk Biochar as Adsorbents for the Extraction of Cesium and Strontium Radioisotope Ions

Plant-derived silica nanoparticles and composites for biosensors, bioimaging, drug delivery and supercapacitors: a review

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