Black SiO2 nanoparticles obtained by pyrolysis of rice husk

Almeida, Suelen R.; Elicker, Carolina; Vieira, Bruno Müller; Cabral, Thayssa Herpet; Silva, Adriana Fernandes da; Filho, Pedro José Sanches; Raubach, Cristiane W.; Hartwig, Carla A.; Mesko, Márcia F.; Moreira, Mário L.; Cava, Sergio

doi:10.1016/j.dyepig.2019.01.030

Cited by 27 publications

(13 citation statements)

References 58 publications

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“…The physicochemical and toxicological characteristics of rice husk (RH) and rice husk ash (RHA) pyrolysis were investigated. [85] Bio-oil made from rice husk by a commercial-scale biomass fast pyrolysis plant was utilized to investigate the effects of long-period storage (two years) under three different conditions. [86] Investigated the potential tertiary treatment of wastewater by adsorption using rice husk biochar (RHC) obtained from microwave pyrolysis of rice husk.…”

Section: Pyrolysismentioning

confidence: 99%

Potential of Rice Industry Biomass as a Renewable Energy Source

et al. 2019

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Fossil fuel depletion, along with its ever-increasing price and detrimental impact on the environment, has urged researchers to look for alternative renewable energy. Of all the options available, biomass presents a very reliable source due to its never-ending supply. As research on various biomasses has grown in recent years, waste from these biomasses has also increased, and it is now time to shift the focus to utilizing these wastes for energy. The current waste management system mainly focuses on open burning and soil incorporation as it is cost-effective; however, these affect the environment. There must be an alternative way, such as to use it for power generation. Rice straw and rice husk are examples of such potential biomass waste. Rice is the main food source for the world, mostly in Asian regions, as most people consume rice daily. This paper reviews factors that impact the implementation of rice-straw-based power plants. Ash content and moisture content are important properties that govern combustion, and these vary with location. Logistical improvements are required to reduce the transport cost of rice husk and rice straw, which is higher than the transportation cost of coal.

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Section: Pyrolysismentioning

confidence: 99%

Potential of Rice Industry Biomass as a Renewable Energy Source

et al. 2019

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“…The use of this residual material would improve the sustainability of this agricultural activity and help to reduce its effect. Rice husk (RH) has been used in different applications: as a fuel due to its calorific value [17], as a source of silica and silicon due to the high content of SiO 2 [18][19][20][21][22], for the preparation of activated carbon [23], in construction materials [24,25], and as a biosorbent in water treatment [26][27][28], among others. In the latter case, after the retention of the contaminants on the husk, a biomass-contaminant residue is generated, which nowadays does not have viable and low-cost alternatives for final disposal.…”

Section: Introductionmentioning

confidence: 99%

Ceramic matrices for immobilization of heavy metals adsorbed on rice husk

et al. 2020

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Numerous studies have been conducted about the removal of heavy metal ions from aqueous solutions using lignocellulosic materials, which are capable of adsorbing various contaminants present even at low concentrations. Rice husk constitutes biomass waste that has found multiple applications in different fields, such as the removal of heavy metals by adsorption. After this process, a biomass-contaminant waste is generated, which currently does not have viable and low-cost alternatives for its final disposal. Thus, the objective of this work is to evaluate the possibility of incorporating rice husk contaminated with Cu-Ni-Cd and Pb-Zn into ceramic matrices, to immobilize these hazardous metals. Ceramic pieces from mixtures of commercial clay and rice husk with adsorbed metal, added by 10% in volume were obtained. The raw materials were characterized by different techniques, such as SEM-EDS, XRD, DTA-TGA, particle size distribution, ecotoxicity, etc., while in ceramic products were analysed porosity, permanent volumetric variation, weight loss of ignition, ecotoxicity, among others. From the overall results, it is possible to conclude that the obtained ceramic pieces have immobilized within their structure, the heavy metals present on rice husk. The bricks have excellent physical and mechanical properties that make possible their use in civil construction.

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“…El aprovechamiento de este material residual lograría mejorar la sostenibilidad de esta actividad agrícola y ayudar a reducir dichos impactos. La cáscara de arroz se ha utilizado en diferentes aplicaciones, entre las que se pueden citar, como combustible debido a su poder calorífico (Babaso & Sharanagouda, 2017), como fuente de sílice y silicio debido al elevado contenido de SiO2 (Abbas et al, 2019;Almeida et al, 2019), para la preparación de carbón activado (Satayeva et al, 2018), en materiales de construcción (Muthuraj et al, 2019), y como adsorbente en el tratamiento de aguas (Palagama et al, 2019). En este último caso, luego de la retención de los contaminantes sobre la cáscara, se genera un residuo biomasa-contaminante, que actualmente no cuenta con alternativas viables y de bajo costo para la disposición final.…”

Section: Introductionunclassified

Matrices cerámicas para la inmovilización de metales pesados sorbidos en cáscara de arroz

Romano

García²,

Quaranta³

2020

AJEA

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Se han realizado numerosos estudios basados en la eliminación de iones de metales pesados de soluciones acuosas utilizando materiales lignocelulósicos, que son capaces de retener diversos contaminantes incluso presentes a bajas concentraciones. La cáscara de arroz constituye un residuo de biomasa que se ha estudiado en diversas aplicaciones. En años recientes se ha utilizado en procesos de biosorción de metales pesados. Después de este proceso, se genera un residuo biomasa-contaminante, que actualmente no tiene alternativas viables de bajo costo para su disposición final segura. Por lo tanto, el objetivo de este trabajo es evaluar la viabilidad de la incorporación a matrices cerámicas, de cáscara de arroz contaminada con Cu-Ni-Cd y Pb-Zn, con el fin de inmovilizar dichos metales pesados. Las piezas cerámicas se obtuvieron a partir de mezclas de arcilla comercial y cáscara de arroz con metal sorbido, añadidas en un 10 % en volumen. Las materias primas se caracterizaron por diferentes técnicas, como SEM-EDS, XRD, DTA-TGA, distribución granulométrica, ecotoxicidad, etc., mientras que en los productos cerámicos obtenidos se analizó: porosidad, variación volumétrica permanente, ecotoxicidad, entre otros. Del análisis de los resultados, se puede concluir que las piezas inmovilizaron dentro de su estructura los metales contenidos en la cáscara de arroz agregada. Los ladrillos presentaron buenas propiedades físicas y mecánicas que hacen posible su uso en la construcción civil.

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Black SiO2 nanoparticles obtained by pyrolysis of rice husk

Cited by 27 publications

References 58 publications

Potential of Rice Industry Biomass as a Renewable Energy Source

Potential of Rice Industry Biomass as a Renewable Energy Source

Ceramic matrices for immobilization of heavy metals adsorbed on rice husk

Matrices cerámicas para la inmovilización de metales pesados sorbidos en cáscara de arroz

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