P-immobilisation and phosphatase activities in lake sediment following treatment with nitrate and iron

The influence of a further developed inlake restoration method on the P-immobilisation and microbial activities, especially under anoxic conditions was investigated. The impact of nitrate and iron dosing with a newly developed nitrate storage compound (Depox ®Fe) was tested in enclosures in the eutr...

Full description

Saved in:
Bibliographic Details
Published in:Limnologica 2005, Vol.35 (1), p.102-108
Main Authors: Wauer, Gerlinde, Gonsiorczyk, Thomas, Casper, Peter, Koschel, Rainer
Format: Article
Language:English
Subjects:
Iron
Lake restoration
Nitrate storage
Phosphatase
Phosphorus
Sediment
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of a further developed inlake restoration method on the P-immobilisation and microbial activities, especially under anoxic conditions was investigated. The impact of nitrate and iron dosing with a newly developed nitrate storage compound (Depox ®Fe) was tested in enclosures in the eutrophic dimictic Lake Dagowsee, Germany. Additions of 50 g m −2 of NO 3 −–N and 66 g m −2 of Fe 3+ ensured availability of nitrate at the sediment surface during a 2-months period. As a result the phosphate release from the anoxic sediments was completely suppressed even 1 year after the application. The hypolimnetic deoxygenation was unaffected by the Depox ®Fe addition. However, sulfur reduction and methanogenesis were inhibited and the phosphatase activity increased.
ISSN:0075-9511
1873-5851
DOI:10.1016/j.limno.2004.08.001