Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media

Gentile, Guillermina J.; Fidalgo de Cortalezzi, María M.

Artículo de Publicación Periódica:
Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media

dc.contributor.author	Gentile, Guillermina J.
dc.contributor.author	Fidalgo de Cortalezzi, María M.
dc.date.accessioned	2024-04-25T15:43:09Z
dc.date.available	2024-04-25T15:43:09Z
dc.date.issued	2016
dc.description.abstract	The simultaneous transport of TiO2 nanoparticles and bacteria Pseudomonas aeruginosa in saturated porous media was investigated. Nanoparticle and bacterium size and surface charge were measured as a function of electrolyte concentration. Sand column breakthrough curves were obtained for single and combined suspensions, at four different ionic strengths. DLVO and classical filtration theories were employed to model the interactions between particles and between particles and sand grains. Attachment of TiO2 to the sand was explained by electrostatic forces and these nanoparticles acted as bonds between the bacteria and the sand, leading to retention. Presence of TiO2 significantly increased the retention of bacteria in the sand bed, but microorganisms were released when nanomaterial influx ceased. The inclusion of nanomaterials in saturated porous media may have implications for the design and operation of sand filters in water treatment.
dc.identifier.uri	https://ri.itba.edu.ar/handle/123456789/4450
dc.language.iso	en
dc.subject	BACTERIAS
dc.subject	TRANSPORTE DE NANOPARTÍCULAS
dc.subject	DIÓXIDO DE TITANIO
dc.title	Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
dc.type	Artículo de Publicación Periódica
dspace.entity.type	Artículo de Publicación Periódica
itba.description.filiation	Fil: Gentile, Guillermina J. Instituto Tecnológico de Buenos Aires, Argentina.
itba.description.filiation	Fil: Fidalgo de Cortalezzi, María M. University of Missouri, Estados Unidos.