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Effect of copper on nitrous oxide reduction in freshwater sediment

✍ Scribed by C. A. Flemming; J. T. Trevors

Publisher
Springer Netherlands
Year
1988
Tongue
English
Weight
361 KB
Volume
40
Category
Article
ISSN
0049-6979

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✦ Synopsis

The effect of Cu(II) sulfate on N20 reduction was studied in anaerobically incubated freshwater sediment at 15 Β° C. At Cu concentrations from 100 to 5000 gg g-1, a concentration-dependent decrease in sediment pH was observed in conjunction with a decrease in N20 reduction in Cu 2 Γ· treated sediment in flask-microcosms analyzed immediately after metal addition. However, if flask-microcosms were amended with Cu 2+ and then pre-incubated to allow the sediment pH to naturally return to its original pH (7.1), an inhibitory effect was only produced at 5000 gg Cu g-1 sediment. Copper retention studies showed that up to 96.4% of the added Cu 2 Γ· (2500 gg g -l ) was retained by sediment.

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