Tratamento De Cinza De Casca De Arroz Por Lixiviação Ácida

Fernandes, Iara Janaína; Calheiro, Daiane; Santos, Emanuele Caroline Araújo dos; Moraes, Carlos Alberto Mendes; Rocha, Tatiana Louise Ávila de Campos; Kieling, Amanda Gonçalves; Brehm, Feliciane Andrade

doi:10.5151/1516-392x-27067

Cited by 4 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Risk residue valorization is a priority for developing countries where it can mitigate health and environmental problems associated with current field burning disposal; [8], [9] uncontrolled burning of rice husk waste releases crystalline silica particles, which when airborne can cause health problems such as silicosis. [10] Rice husk waste is a significant energy source for methane and hydrogen production, [11,12] from biomass power plants, however environmental concerns remain regarding the resulting ash disposal. [13] Ash produced by the controlled burning of rice husk waste contains amorphous silica, a potential precursor for the production of functional materials including silicon carbides, silicon nitrides and zeolites.…”

Section: Introductionmentioning

confidence: 99%

Valorization of rice husk silica waste: Organo-amine functionalized castor oil templated mesoporous silicas for biofuels synthesis

Elimbinzi

Nyandoro

Mubofu

et al. 2020

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Section: Introductionmentioning

confidence: 99%

Valorization of rice husk silica waste: Organo-amine functionalized castor oil templated mesoporous silicas for biofuels synthesis

Elimbinzi

Nyandoro

Mubofu

et al. 2020

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

show abstract

“…It must use rice husk or biomass as a calorie-producing ingredient; Total drying production cost rate must be lower than the traditional bed dryer, and even the ordinary drying process by drying and utilizing sunlight (open sun drying); Do not require human assistance during the drying process other than one operator who oversees and runs the machine; Firm and has a long useful life investment; Safe in operation; The new system is an attachment to ordinary flatbed dryer so it should utilize the same body/chamber of ordinary one; It must be ensured that the operator or human skin contact involved is a little possible with grains. Grains skin contains very high silica [12] which will cause itching due to the scratching of the skin of grains with human skin, and also the sharp silica properties.…”

Section: Methodsmentioning

confidence: 99%

Auto-Stirring Grains Bed Dryer as an Innovative Efficiency Solution

2019

View full text Add to dashboard Cite

The government has budgeted assistance/grants continuously many bed dryers to farmers but many of them were not used because farmers felt that the drying production rate of rice is more expensive than the traditional open sun drying. The farmers choose to go back to the traditional way that takes the drying process longer than using the dryer. For 1 year, open sun drying can process 100 batches, and dryer can process 450 batches. This research tries to solve the high cost problem by looking for a new alternative solution. The solution is replacing the oil burner with a rice husk burner, which is appropriate both economically and environmentally. For the stirring mechanism, this system must continuously stir up the pile of grains during the drying process. The point must be fulfilled is that the total cost of the drying process should not rise, especially the cost of the stirring process. A stirrer mechanism that needs smaller power than the maximum power setting is made. Farmers’ income for this innovative modification will get a 332% increasing profit than using oil burner bed dryer machine and will get a 41% increasing in welfare than using the standard husk burner bed dryer.

show abstract

“…From this, willing to improve the vegetal matrix wear resistance, it was tested new bond samples made with polyurethane castor oil resin, filled with silicon carbide (SiC) and silica from rice hull ash (RHA) [14]. The RHA has approximately 90% of silica in its composition [15] which makes it highly valued, besides presenting inert characteristics, having a great potential to be used as a polymer filler [16].…”

Section: Introductionmentioning

confidence: 99%

Ecological Fickerts Used in the Dimension Stones Polishing Reinforced with Silica from the Rice Hull Ash

Dorigo

Silveira

Almeida

2020

KEM

View full text Add to dashboard Cite

The processing stages of the dimension stones industry uses inputs mainly from petroleum-derived chemicals that can cause damages to the environment and to the human health. Therefore, there is a need to develop more ecological and sustainable technologies aiming to replace the conventional inputs by less aggressive ones. From this, ecological fickerts made from polyurethane castor oil resin (Ricinus communis L.), silicon carbide (SiC), silica from rice hull ash (RHA) and synthetic diamonds were developed in order to compare them with the epoxy resin fickerts currently used in industry. For such, each half of a Brazilian granite slab was polished using each different type of fickerts and the gloss measures results were compared. It was found that the side of the slab polished using the ecological fickerts presented brightness values about 10 Gloss Units (GU) greater than the other side polished with the conventional abrasives. In addition, the ecological fickerts presented lower wear values, and consequently lower mass loss compared to the conventional ones. These results indicate that the ecological fickerts are a good alternative to the dimension stones polishing, even considering sustainability aspects and more eco-efficiency inputs materials.

show abstract

Tratamento De Cinza De Casca De Arroz Por Lixiviação Ácida

Cited by 4 publications

References 7 publications

Valorization of rice husk silica waste: Organo-amine functionalized castor oil templated mesoporous silicas for biofuels synthesis

Valorization of rice husk silica waste: Organo-amine functionalized castor oil templated mesoporous silicas for biofuels synthesis

Auto-Stirring Grains Bed Dryer as an Innovative Efficiency Solution

Ecological Fickerts Used in the Dimension Stones Polishing Reinforced with Silica from the Rice Hull Ash

Contact Info

Product

Resources

About