Rice Husk Ash Impregnated with Silver Nanoparticles for Water Purification

Gutiérrez, Ángela M.; Hotza, Dachamir; Dutra, Gabriel Benedet; Nogueira, André Lourenço; Franco, Carlos; Acchar, Wilson; Rambo, Carlos R.

doi:10.4028/www.scientific.net/msf.798-799.727

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…When a higher mixed RHA content was added to the composition, the surface area of the geopolymer gradually increased. These results were found to be typically within the range reported . With the increase of RHA from 0 to 60% in the prepared geopolymer, the surface area was enhanced from 19.2 m 2 /g for 100RM0RHA to 29.5 m 2 /g for 40RM60RHA.…”

Section: Resultssupporting

confidence: 85%

Effect of Red Mud and Rice Husk Ash-Based Geopolymer Composites on the Adsorption of Methylene Blue Dye in Aqueous Solution for Wastewater Treatment

Nguyen,

Thu,

Tran

et al. 2023

ACS Omega

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In this study, geopolymer originating from locally industrial byproducts as red mud (RM) was successfully prepared in the presence of different loadings of rice husk ash (RHA) used for the adsorption of methylene blue (MB) in wastewater. During geopolymerization, various mixing amounts between RM and RHA were conducted when the weight ratio of binder solution/ activated alkali-metal solution (Na 2 SiO 3 / NaOH 7 M) was 2.5 and the curing temperature was set at 60 °C for 24 h. As a result, the surface area value of the prepared geopolymer composited with RHA at 0 and 60% was increased from 19.2 to 29.5 m 2 /g, while the BJH pore size of the prepared geopolymer was reduced to 6.68 and 5.76 nm, respectively. In the dye removal test, higher additions of RHA in the RM-geopolymer maintained better retention of the MB ion due to the increase in the adsorption binding site. The maximum uptake amount of dyes performed at pH 8 was changed from 6.59 to 10.74 mg/g, while RHA was from 0 to 60% after 180 min of immersion in MB solution. The adsorption isotherms well obeyed the Langmuir model, as the relative coefficient R 2 was 0.999. Based on these, the initial agricultural waste as RHA and industrial byproducts as RM were valued as functional materials used for dye treatment in wastewater.

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Section: Resultssupporting

confidence: 85%

Effect of Red Mud and Rice Husk Ash-Based Geopolymer Composites on the Adsorption of Methylene Blue Dye in Aqueous Solution for Wastewater Treatment

Nguyen,

Thu,

Tran

et al. 2023

ACS Omega

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“…[ Table III potável para consumo humano [16][17][18][19][20]. Em particular, os resultados foram similares aos obtidos em [12] para substratos cerâmicos tratados com APTES.…”

Section: Resultsunclassified

Ancoragem da prata em substratos cerâmicos para tratamento de água de consumo

et al. 2019

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Resumo A fabricação de vasos cerâmicos impregnados com prata possibilita o acesso à água potável de uma forma barata e com fabricação relativamente simples. Este estudo teve como objetivo promover a modificação superficial de filtros cerâmicos utilizando APTES e EDTA como agentes ancoradores para melhorar a impregnação da prata e a eficiência e durabilidade dos filtros, avaliando-se diferentes rotas de modificação superficial. A ancoragem e adsorção da prata foram analisadas por espectroscopia FTIR e absorção atômica, e a água filtrada foi analisada quanto à presença de Escherichia coli. Os resultados obtidos demonstraram que a ancoragem melhorou a captura da prata pela cerâmica, em especial com o EDTA, não importando a ordem nas etapas de impregnação. Todos os substratos impregnados com prata, ancorados ou não, apresentaram ausência de E. coli, demonstrando que o procedimento de impregnação atingiu o efeito bactericida esperado e que a ancoragem não interferiu na atuação microbiológica dos filtros.

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“…The outer cell wall of the E. Coli is adversely affected the by silver nanoparticles paving the way to eliminate them [41]. A controlled experiment involving water spiked with E. Coli tested against RHA infused with nano silver showed the effective significant reduction in the Coli population at dilute concentrations between 0.5 g•mL -1 to 4 g•mL -1 of nano silver [42]. Copper nanoparticles have also been reported to possess anti-microbial properties again E. Coli [43].…”

Section: Drinking Water Treatmentmentioning

confidence: 99%

Rice husk ash utilization, composition and properties: A brief review

Ullal

Shivaramu²,

Aveen

2022

J Met Mater Miner

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Asian countries rely massively on rice to feed and sustain its massive population. For long the staple food has provided nourishment to the masses and the classes. Rice is grown in large quantities in Asian countries. A by-product of its cultivation is its husk. The husk of the rice grain is mainly utilized as a fuel for the boilers in the rice mills. The uncontrolled burnt rice husk referred to as rice husk ash consists majorly of silica. silica is used in a wide variety of commercial and industrial applications. Use of rice husk ash in various products serves to reduce the pollution caused by its pileup in localities especially close to the rice mills. More sustainable and an affordable source of Si would benefit the society rather than disposing rice husk ash in the fields and landfills. This brief review provides insights into the synthesis, applications, and properties of rice husk ash incorporated products either directly in the as received conditions or under modified conditions.

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Rice Husk Ash Impregnated with Silver Nanoparticles for Water Purification

Cited by 6 publications

References 12 publications

Effect of Red Mud and Rice Husk Ash-Based Geopolymer Composites on the Adsorption of Methylene Blue Dye in Aqueous Solution for Wastewater Treatment

Effect of Red Mud and Rice Husk Ash-Based Geopolymer Composites on the Adsorption of Methylene Blue Dye in Aqueous Solution for Wastewater Treatment

Ancoragem da prata em substratos cerâmicos para tratamento de água de consumo

Rice husk ash utilization, composition and properties: A brief review

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