Journal
IET NANOBIOTECHNOLOGY
Volume 9, Issue 4, Pages 215-219Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-nbt.2014.0025
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Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACYT)
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Rice husk was employed as a source for producing silica micro- and nanoparticles through its digestion by soil fauna. Although many physicochemical methods for producing nanostructures have been studied, the biological processes remain mostly unexplored. Alkaline hydrogen peroxide with continuous control of reaction pH allowed removal of lignin bonds while preserving most of the cell wall and the silica present in the rice husk. The accessibility of lignocellulose was achieved without removing appreciable amounts of lignin, so this agricultural byproduct can be employed as feeding material for microarthropods Folsomia candida (Collembola). When these microarthropods are placed on a substrate of treated rice husk, more than 85% of degraded material is obtained, as compared to the untreated rice husk substrate, while the silica particles obtained show a slight decrease in average size.
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