PMID: 11317886Apr 25, 2001Paper

The potential for phosphorus release across the sediment-water interface in an eutrophic reservoir dosed with ferric sulphate

Water Research
R G Perkins, G J Underwood

Abstract

Alton Water, Suffolk, UK is a pumped storage reservoir that has a history of cyanobacterial blooms. Dosing of the input water with ferric sulphate to control external phosphorus loading has occurred since 1983. A detailed study of the sediment chemistry of the site was carried out between May 1995 and July 1997. Sequential phosphorus fraction analysis indicated a decrease along the length of the reservoir in sediment labile phosphorus content from 0.62 to 0.08 mg P g-1 dw and iron-bound phosphorus content from 3.22 to 0.46 mg P g-1 dw. These gradients positively correlated with water column chlorophyll a concentrations reported in a parallel study. Labile and iron-bound sediment phosphorus contents were in a dynamic equilibrium due to diffusional release, contributing to internal loading to the water column. Equilibrium phosphorus concentrations (EPC) determined from phosphorus adsorption capacity (PAC) experiments were lower inside the bunded region (0.01-0.03 mg P-PO4 l-1) where iron content was greatest compared to outside the bund (0.15-0.20 mg P-PO4 l-1) suggesting greater potential for diffusional release of phosphorus at the latter site. PAC experiments indicated that anaerobic and pH-mediated loadings were of less impor...Continue Reading

Citations

May 8, 2010·Environmental Monitoring and Assessment·K R RenjithManju Mary Joseph
Oct 2, 2015·Environmental Science and Pollution Research International·SheJiang LiuHui Ding
Jul 29, 2009·Journal of Environmental Sciences (China)·Shujuan SunWei Wen
Aug 31, 2018·Environmental Science and Pollution Research International·Sheila Cardoso-SilvaMarcelo L M Pompêo
Nov 29, 2016·Water, Air, and Soil Pollution·Hanna SiwekKatarzyna Sobecka
Jun 2, 2006·Journal of Environmental Quality·Christophoros Christophoridis, Konstantinos Fytianos
Jun 15, 2011·Journal of Environmental Monitoring : JEM·Akeem AbayomiPaul J Worsfold
Jan 13, 2021·The Science of the Total Environment·Qipeng WangCilai Tang

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