Porous Silica Nanoparticles from Rice Husk for the Elimination of Erichrome Black T (EBT) from Laboratory Waste Water

The current research is focused on developing a geopolymer binder using rice husk ash–derived silica nanoparticles. Four types of rice husks were collected directly from various rice fields of Bangladesh in order to evaluate the pozzolanic activity and compatibility of the derived rice husk ashes with precursors of sodium-based geopolymers. Silicon carbide whiskers were introduced into sodium-based geopolymers in order to evaluate the response of silicon carbide whiskers to the interfacial bonding and strength of sodium-based geopolymers along with rice husk ashes. Compression, flexural and short beam shear tests were performed to investigate the synergistic effect of rice husk ashes–derived silica and commercially available silicon carbide whiskers. Results show that rice husk ashes–derived spherical silica nanoparticles reduced nano-porosity of the geopolymers by ∼20% and doubled the compressive strength. The simultaneous additions of rice husk ashes and silicon carbide whiskers resulted in flexural strength improvement by ∼27% and ∼97%, respectively. The increase in compressive strength due to the inclusion of silica nanoparticles is related to the reduction in porosity. The increase in flexural strength due to simultaneous inclusion of silica and silicon carbide whiskers suggest that silica particles are compatible with the metakaolin-based geopolymers, which is effective in consolidation. Finally, microscopy suggest that silicon carbide whiskers are effective in increasing bridged network and crack resistance.

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Eco-fabrication of hierarchical porous silica monoliths by ice-templating of rice husk ash

Green Chemistry ◽

10.1039/c6gc02153k ◽

2017 ◽

Vol 19 (1) ◽

pp. 188-195 ◽

Cited By ~ 32

Author(s):

Amin Bahrami ◽

Ulla Simon ◽

Niloofar Soltani ◽

Sara Zavareh ◽

Johannes Schmidt ◽

...

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Porous Silica ◽

Synthesis Process ◽

Sustainable Chemistry ◽

Silica Monoliths ◽

Hierarchical Porous ◽

Ice Templating

In this study, within a sustainable chemistry approach, a clean and eco-friendly synthesis process of silica monoliths compatible with environmental limitations is developed.

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Fluorescent non-porous silica nanoparticles for long-term cell monitoring: Cytotoxicity and particle functionality

Acta Biomaterialia ◽

10.1016/j.actbio.2013.04.026 ◽

2013 ◽

Vol 9 (11) ◽

pp. 9183-9193 ◽

Cited By ~ 30

Author(s):

Stefaan J. Soenen ◽

Bella Manshian ◽

Shareen H. Doak ◽

Stefaan C. De Smedt ◽

Kevin Braeckmans

Keyword(s):

Silica Nanoparticles ◽

Porous Silica ◽

Cell Monitoring

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Natural Rubber Reinforced with Silica Nanoparticles Extracted from Jasmine and Riceberry Rice Husk Ashes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.936.31 ◽

2018 ◽

Vol 936 ◽

pp. 31-36 ◽

Cited By ~ 2

Author(s):

Wichudaporn Seangyen ◽

Paweena Prapainainar ◽

Pongdhorn Sae-Oui ◽

Surapich Loykulnant ◽

Peerapan Dittanet

Keyword(s):

Tensile Strength ◽

Natural Rubber ◽

Silica Nanoparticles ◽

Rice Husk ◽

Sol Gel ◽

Rubber Matrix ◽

Reinforcing Fillers ◽

Rubber Nanocomposites ◽

Jasmine Rice ◽

20 Nm

Silica nanoparticles were synthesized by rice husk ash (RHA) produced from jasmine rice husk and riceberry rice husk via sol-gel method for the use as reinforcing fillers in natural rubber (NR). The obtained silica nanoparticles are spherical in shape and the particle sizes were observed to be in the 10-20 nm range with uniformly size distribution. The surface of silica nanoparticles was treated with a silane coupling agent confirmed by FTIR. The treated silica nanoparticles were then incorporated into NR and vulcanized with electron beam irradiation. The rubber nanocomposites with silica nanoparticles, produced from jasmine rice husk and riceberry rice husk, resulted in higher mechanical properties (tensile strength and modulus) than neat rubber vulcanizate. The modified rubber vulcanizates revealed rougher surface with tear lines as compared to the neat rubber vulcanizates, indicating the improved strength. Interestingly, the rubber nanocomposites with silica nanoparticles from jasmine rice husk showed higher tensile strength and modulus than silica nanoparticles produced from riceberry rice husk. The micrographs indicated better dispersion of NR composites with jasmine rice husk which leads to a strong interaction between silica nanoparticles and rubber matrix, thereby improving the strength.

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Porous Silica Nanoparticles for Drug Delivery and Controlled Release

Nanotechnology and Drug Delivery, Volume One ◽

10.1201/b17271-10 ◽

2014 ◽

pp. 290-327

Author(s):

Xiaoxing Sun ◽

Brian Trewyn

Keyword(s):

Drug Delivery ◽

Controlled Release ◽

Silica Nanoparticles ◽

Porous Silica

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Treatment of Alkaline Waste Water Generated by the Hydrolysis of Rice Husk

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.781-784.2087 ◽

2013 ◽

Vol 781-784 ◽

pp. 2087-2090 ◽

Cited By ~ 3

Author(s):

Ludmila A. Zemnukhova ◽

O.D. Arefieva ◽

Anastasia A. Kovshun

Keyword(s):

Waste Water ◽

Electrochemical Oxidation ◽

Rice Husk ◽

Alkaline Hydrolysis ◽

Waste Water Treatment ◽

Oxygen Demand ◽

Organic Substances ◽

Silicon Compounds ◽

Treatment Stage ◽

Hydrolysis Of

This article shows the results of research on finding ways to purify waste water produced by alkaline hydrolysis of rice waste - rice husk. Two methods were used: baromembrane filtration and electrochemical oxidation of organic substances. It was found that in the results of baromembrane processing of hydrolyzate on the membranes mainly stay silicon compounds partially sorbing organic substances contained in the feedstock. Through the membranes there pass the major part of microbiologically oxidated organic matter, so its difficult to reach the required waste water treatment stage. The use of electrochemical oxidation of organic substances extracted by alkaline hydrolysis of rice husks into a solution allows more qualitatively treat the solution. A range of indicators (chemical oxygen demand, permanganate demand, polyphenols) evaluating the content of organic compounds in the desilicated solution showed that in order to remove them effectively enough electrolyte concentration of sodium chloride is 4 g L-1, formed by the desilication and dilution of the solution with the distilled water 1:10.

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