Variation in riparian consumer diet composition and differential bioaccumulation by prey influence the risk of exposure to elements from a recently remediated fly ash spill
Emerging aquatic insects play a key role in transporting aquatic nutrients and contaminants to riparian consumers. However, little is known about how within and between year variation in the diet or patterns of element bioaccumulation in emerging insect taxa may influence the risk of exposure to wildlife. During two breeding seasons, we examined the composition of the diet of tree swallows ...
Chemical sequential extraction of heavy metals and sulphur in bottom ash and in fly ash from a pulp and paper mill complex
A five-stage sequential extraction procedure was used to determine the distribution of 11 metals (Cd, Cr, Cu, Mo, Pb, Zn, As, Co, V, Ni, Ba), and sulphur (S) in bottom ash and in fly ash from a fluidized bed co-combustion (i.e. wood and peat) boiler of Stora Enso Oyj Oulu Mill at Oulu, Northern Finland, into the following fractions: (1) water-soluble fraction (H2O); (2) exchangeable fraction ...
Evaluating the concentrations of partitioned heavy metals in fly ash from a medium-sized (32 MW) municipal district heating plant with respect to the new Finnish limit values
The total heavy metal concentrations in the fly ash were clearly lower than the Finnish limit values for forestry fertilisers, and for material used as an earth construction agent, which came into force in March 2007 and in June 2006, respectively. The relatively low heavy metal concentrations, the alkaline pH (12.5) and the elevated Ca concentration (139.5 g kg−1; d.w.) indicate that the fly ash ...
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