Release of Organic P Forms from Lake Sediments
2011 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 45, no 2, 565-572 p.Article in journal (Refereed) Published
The effects of different physical and chemical conditions on the decomposition and release of organic and inorganic P compound groups from the sediment of Lake Erken were investigated in a series of laboratory experiments. Conditions investigated were temperature, oxygen level, and the effects of additions of carbon substrate (glucose) and poison (formalin). The effects on the P compound groups were determined by measurements with 31P NMR before and after the experiments, as well as analysis of P in efﬂuent water throughout the experiment. Phosphate analysis of the efﬂuent water showed that oxygen level was the most inﬂuential in terms of release rates, with the sediments under anoxic conditions generally releasing more phosphate than the other treatments. 31P NMR showed that the various treatments did inﬂuence the P compound group composition of the sediment. In particular, the addition of glucose led to a decrease in orthophosphate and polyphosphate while the addition of formalin led to a decrease in phosphorus lipids, DNAphosphate and polyphosphate. Oxic conditions resulted in an increase in polyphosphates, and anoxic conditions in a decrease in these. Temperature did not seem to affect the composition signiﬁcantly.
Place, publisher, year, edition, pages
2011. Vol. 45, no 2, 565-572 p.
Organic phosphorus, Release Sediments, 31P NMR
Research subject Chemistry with specialization in Analytical Chemistry; Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-140274DOI: 10.1016/j.watres.2010.09.020ISI: 000286790500015PubMedID: 20947118OAI: oai:DiVA.org:uu-140274DiVA: diva2:383365