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Wood Ash Database

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WoodAsh referensdatabas

Denna referensdatabas är ämnad att tillhandahålla referenser för att göra det lättare att finna vidare läsning och förståelse för vedaskors användning i skogsbruk och relaterade forskningsområden.

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Författare eller titel

Detaljer

TitelLong-term leaching of stabilized wood ash
FörfattareSteenari BM;Marsic N;Karlsson LG;Tomsic A;Lindqvist O;
Datum1998
JournalScandinavian Journal of Forest Research
Från sida3
Till sida16
VolymSupplement No. 2
Utgåva
AbstraktThe long-term leaching of two wood ashes, a granulated ash from a circulating fluidized bed boiler (CFB) and a grate-fired boiler (GF) ash, stabilized by wetting and agglomeration, was simulated in laboratory experiments and theoretically, with a kinetic model. Ash particles extracted from a Swedish forest soil 2 years after spreading were also analysed. The results showed that leaching rates for nutrients depend on particle size, durability of ash aggregates and nutrient speciation. The hard CFB ash granules released less of their salt content than did the more fragile GF ash aggregates. Differences in matrix durability as well as in Ca speciation also rendered the CFB ash granules the lowest Ca leaching rates. The Ca leaching rates predicted for different particle sizes by the kinetic model were significantly higher than those obtained experimentally. This discrepancy is probably due to factors such as decreasing porosity and chemical inhibition of calcite dissolution during experiments