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Short-term effects of a buffered alum treatment on Green Lake sediment phosphorus speciation
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
2008 (English)In: Lake and reservoir management, ISSN 1040-2381, E-ISSN 2151-5530, Vol. 24, no 2, 181-189 p.Article in journal (Refereed) Published
Abstract [en]

Green Lake, Washington, was treated with a dose of 24 mg Al/L aluminum   sulfate (alum) and sodium aluminate during March-April 2004 to reduce   dissolved phosphorus concentrations to ameliorate a variety of   eutrophication-related problems. Four sediment cores collected six   months after the alum treatment in Green Lake were used to examine the   short-term effects of alum on sediment phosphorus speciation. Peaks in   aluminum bound phosphorus (Al-P) and total aluminum (Tot-Al) were   observed in three of the four cores analyzed, resulting in an average   ratio of added Al to Al-P formed (Al:Al-P) of 112:1. By comparing this   ratio to the average ratio of similar to 11:1 found in other   alum-treated Washington lakes, it can be inferred that approximately   10% of the binding capacity of the added Al had been utilized. Assuming   a final ratio of Al:Al-P of 11:1, the added Al has the potential   capacity to bind a total of 21.6 g/m(2) of P. The amount of sediment   inorganic P that supports internal loading (Fe-P and labile-P) in the   fall of 2004 was determined to be 2.8 g/m(2). Thus the quantity of alum   added to Green Lake should be sufficient to inactivate the remaining   inorganic mobile-P and to control future P mobilization from the pool   of organic sediment P.

Place, publisher, year, edition, pages
2008. Vol. 24, no 2, 181-189 p.
Keyword [en]
aluminum bound P, aluminum sulfate, mobile-P, P-fractionation, phosphorus, sediment
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-107680DOI: 10.1080/07438140809354059ISI: 000269666100006OAI: oai:DiVA.org:uu-107680DiVA: diva2:232452
Available from: 2009-08-24 Created: 2009-08-24 Last updated: 2017-12-13Bibliographically approved

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