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.
1992
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Alhaji Jeng Harald BergsethSammendrag
Alum shale and till soils overlying alum shale bedrock were analysed for aqua regia and NH4OAc/EDTA extractable Pb, Cu, Zn, Ni, Mn and Cd. The means of these determinations were compared with those of Norwegian, Finnish and Swedish non-alum shale soils. Alum shale soils seemed to contain higher amounts of both total and easily extractable Cu, Zn, Ni and Cd. Total Pb content also seemed to be higher in the alum shale soils. The relative availability of Cd, Ni and Mn, expressed as the ratio of NH4OAc/EDTA to aqua regia extractable, was found to be greater than that of Pb, Cu and Zn in the alum shale and till soils.
Forfattere
Alhaji S. JengSammendrag
Pulverized rock samples of alum shale were agitated in distilled water for up to 100 days, in acid solutions of increasing concentrations for 24 h, and lastly treated with increasing amounts of lime as CaCO3 and equilibrated for 100 days. The effects of the different treatments on the release of Fe, Cu, Zn, Ni, Cd, Pb and Mn were studied. The aging experiment indicated that, with time, large amounts of heavy metals may be released by alum shales. The MUNCH sample, with a high buffer capacity against acid, was found to be slow in heavy metal release. The high correlation coefficients for added H+ versus % of total metal released, however, reflect that under the influence of "foreign" acids, this sample will also be capable of releasing heavy metals relatively easily. Liming was effective in rendering the heavy metals immobile. 90-100 tons of CaCO3 were found to be enough to immobilise most of the metals released from a shale waste to an acceptable level, assuming a shale waste density of 1-2 kg dm-3.
1991
Forfattere
Jens KværnerSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Alhaji JengSammendrag
The investigations have shown that Norwegian alum shales have the capacity of producing large amounts of acidity. The amounts produced, though strongly correlated with the amount of pyrite in the material, also depends upon the quality of the pyrite, i.e. its weatherability. A shale sample collected from a road-cut near Brumunddal (BRUM 1) contains much higher amounts of pyrite than samples from Storting and Munchsgate, Oslo (STORT and MUNCH respectively), but the relationship between % pyrite remaining and acid produced is, for example, much stronger in STORT than in BRUM 1. The pyrite in STORT and MUNCH appears as minute grains, finely distributed in the material, whereas in BRUM 1 it appears more as concretions. This is a determining factor in the rate of weathering and potentiality of acid production, with finer grained pyrite weathering more easily than coarser grained. Another important factor in the weathering of shales is the presence of carbonates and other buffering components. It is demonstrated in these investigations that calcareous shales like the MUNCH sample whether at a slower rate than acid shales like STORT & BRUM1, because the acid generated, which is mainly responsible for the weathering, is consumed at a faster rate and more completely in the former than in the two latter samples. As such, small amounts of acid, Fe and A1 were found in solution for MUNCH during the 100-day weathering period, contrary to what was found in the acid samples. The liming trial further demonstrates this fact.
1990
Forfattere
Jens KværnerSammendrag
Det er ikke registrert sammendrag
1978
Forfattere
Geir Goffeng Johannes Øydvin Bonsak Hammeraas Arne LøweSammendrag
Overlevelse av gul potetcystenematode (yPCN) Globodera rostochiensis (Ro-1) er testet i rankekompostering på friland i to typer kompost, A: Malt husholdningsavfall tilsatt septiktankslam i forholdet 25 m³ slam per 100 m³ nymalt avfall. Kompostert i 4 uker før forsøksstart. B: Nymalt husholdningsavfall uten slam. Forsøket ble startet 20. januar 1976. Uttak av yPCN ble gjort etter 1, 3, 7, 11 og 16 uker og umiddelbart satt sammen med mottakelig potet. Etter 3 måneder i vekstrom vises overlevelse med nydannede cyster på potetrota. Fra kompost A etter 16 uker (siste uttak) for yPCN plassert i 10 cm dyp, og etter 11 uker (siste uttak) ved 25 cm dybde. Temperaturen ved 25 cm var over 50 ºC fra forsøksstart og i de 9 følgende ukene. I kompost B ble det registrert overlevelse etter 7 og 11 uker ved henholdsvis 10 og 25 cm dybde.
null
Forfattere
B.N. StafsethSammendrag
Det er ikke registrert sammendrag
Populærvitenskapelig – Avløpsslam i jord - kjemiske og mikrobiologiske effekter.
Carl-Einar Amundsen
Forfattere
Carl-Einar AmundsenSammendrag
Det er ikke registrert sammendrag