title: Production of micro- and nanosilica from soil inhabiting Folsomia candida fed with treated rice husk.
abstract: 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.
authors.affiliation: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro 76230, Mexico.
authors.forename: Barbara
authors.initials: B
authors.lastname: Moreno-Murguía
authors.affiliation: Departamento de Física, Facultad de Ciencias, UNAM, México, D.F. 045100, Mexico.
authors.forename: Jorge R
authors.initials: JR
authors.lastname: Soto-Mercado
authors.affiliation: Unidad Multidisciplinaria de Docencia e Investigación de Juriquilla, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro 76230, Mexico.
authors.forename: Juan B
authors.initials: JB
authors.lastname: Morales-Malacara
authors.affiliation: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro 76230, Mexico. meneses@unam.mx.
authors.forename: Victor M
authors.initials: VM
authors.lastname: Castaño
mesh_terms: D000818:Animals; D001181:Arthropods / Q000378:metabolism*; D053758:Nanoparticles / Q000737:chemistry*; D012275:Oryza / Q000378:metabolism*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry* / Q000378:metabolism*; D012987:Soil / Q000737:chemistry / Q000469:parasitology*
chemical_list: D012987:Soil; D012822:Silicon Dioxide