Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2010
Forfattere
Guro HenselSammendrag
Info om www.avlop.no og WEB GIS
Forfattere
Guro HenselSammendrag
Nettbasert kurs mindre avløpsrenseanlegg
Sammendrag
Dimensjonering av mindre avløpsrenseanleggGrunnundersøkelser - viktige momenterFeltbefefaring med gjennomføring av grunnundersøkelserRenseløsninger for hytter - dimensjonering og ulike løsninger
Sammendrag
På oppdrag for Vestby kommune har Bioforsk Jord og miljø foretatt prøvetaking av bekk og drensvann nedenfor det nedlagte deponiet på åmodt ved Hølen i Vestby. Deponiet var i drift fra 1957- 1978, og det ble deponert husholdningsavfall, industriavfall og slam. Deponiet er godt overdekket med leir-holdige jordmasser og tidligere vurderinger tilsier ingen konflikt mellom deponiet og dagens arealbruk. Det er god avskjæring av overvann, og liten innstrømning av grunnvann til deponiet. Sigevann fra deponiet slippes ut i åmodtbekken sammen med vann fra nedbørfeltet oppstrøms deponiet. Tidligere undersøkelser har ikke påvist utslipp av gass fra deponioverflaten. Etter krav fra Fylkesmannen høsten 2006, er det satt opp et overvåkningsprogram for å følge opp sige-vannspåvirket vann, samt resipienten som er åmodtbekken. Bioforsk Jord og miljø har vært ansvarlig for prøvetaking og oppfølging av deponiet i 2009.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Currently, very little data exist on the exposure of soil biota to engineered nanoparticles (ENPs), in spite of soils being an important potential sink for ENPs. Though, data on exposure are essential to determine whether or not, or to which extent, a hazard constitutes a risk. This knowledge gap is mainly due to difficulties in tracing ENPs in soils where natural nanoparticles are abundant. We used neutron activated ENPs as tracers and examined the exposure (uptake, excretion and internal distribution) of nanoparticles of cobalt (Co NPs 3.9 ± 0.8 nm) and silver (Ag NPs 20.2 ± 2.5 nm) in the earthworm Eisenia fetida, and compared this to soluble cobalt and silver salts. Accumulation patterns were highly different for cobalt and silver. Concentrations of cobalt in worms after 4 weeks exposure reached 88% and 69% of the Co ions and Co NPs concentrations in food, respectively, while corresponding values for Ag ions and Ag NPs were 2.3% and 0.4%. Both Ag NPs and Ag ions in earthworms were excreted rapidly, while only 32% of the accumulated Co ions and Co NPs were excreted within a 4 months depuration period. High accumulation of cobalt was found in blood, and to a lesser extent in the digestive tract. Sequential extraction and centrifugal ultrafiltration provided useful information on metal speciation, dissolution and bioavailability of Co NPs and Ag NPs. Both Ag NPs and Ag ions were strongly bound to soil constituents, whereas Co NPs and Co ions were largely found as water soluble species, in good agreement with the results from the uptake study.
Sammendrag
The exponential increase in the use of engineered nanomaterials (ENMs) in a variety of commercially available products has raised concerns about their release into environmental compartments. Soils in particular have been pointed out as a major environmental sink for ENMs, e.g. through the application of sewage sludge to soil. However, data are scarce on the fate of ENMs in soils and on their bioavailability to organisms once ENMs interact with the soil matrix. The main reason for this knowledge gap has been the methodological challenges to trace and quantify ENMs in complex matrices like soils due to the presence of abundant natural nanoparticles (e.g. clays, iron oxides, organic matter). Methods able to overcome this hurdle will be introduced, as well as their limitations. The aim of this lecture is to present the current state of knowledge on the fate, behavior and toxicity of some of the most commercialized ENMs (carbon nanotubes, fullerenes, metal and metal oxides) in terrestrial ecosystems. We will see the potential modifications ENMs may undergo in soils, namely agglomeration, adsorption to soil constituents, dissolution of particles, effects of pH and organic matter on their speciation, and how these parameters can influence their transport in soil and their bioavailability to organisms. Ecotoxicity will also be addressed, through studies on bacteria, nematodes and earthworms.
Sammendrag
Currently, very little data exist on the exposure of soil biota to engineered nanoparticles (ENPs), in spite of soils being an important potential sink for ENPs. This is mainly due to difficulties in tracing ENPs in soils where natural nanoparticles are abundant. We used neutron activated ENPs as tracers and examined the exposure (uptake, excretion and internal distribution) of nanoparticles of cobalt (Co NPs 3.9 ± 0.8 nm) and silver (Ag NPs 20.2 ± 2.5 nm) in the earthworm Eisenia fetida, and compared this to soluble cobalt and silver salts. Accumulation patterns were highly different for cobalt and silver. Concentrations of cobalt in worms reached 88% and 69% of the Co ions and Co NPs concentrations in food, respectively, while corresponding values for Ag ions and Ag NPs were 2.3% and 0.4%. Both Ag NPs and Ag ions in earthworms were excreted rapidly, while only 32% of the accumulated Co ions and Co NPs were excreted within 4 months. High accumulation of cobalt was found in blood, and to a lesser extent in the digestive tract. Sequential extraction and centrifugal ultrafiltration provided useful information on metal speciation and bioavailability of Co NPs and Ag NPs.
Forfattere
Emmanuel Lapied Claire Coutris Elara Moudilou Jean-Marie Exbrayat Deborah H. Oughton Erik JonerSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag