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Nutrient release from integrated constructed wetlands sediment receiving farmyard run-off and domestic wastewater

Dong, Y, Kayranli, B, Scholz, M and Harrington, R 2013, 'Nutrient release from integrated constructed wetlands sediment receiving farmyard run-off and domestic wastewater' , Water and Environment Journal, 27 (4) , pp. 439-452.

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Abstract

Constructed wetland sediments are frequently contaminated with nitrogen and phosphorus. There is a risk that accumulated pollutants can either be remobilised or reach the groundwater. Five identical mesocosms, which were filled with subsoil collected from full-scale integrated constructed wetland (the first cell receives the most contaminated influent), were set up to examine nutrient removal within sediment layers. The results indicated that accumulated nutrients leached out into inflow water and that the sediment capacity of nutrient retention decreased as the wetlands aged. Furthermore, the mesocosm planted with Phragmites australis achieved better treatment results compared with the one planted with Agrostis stolonifera. The risk of contamination to groundwater does not exist because none of the treated water reached the bottom outlet during the study period. Both the bentonite (clay) and biogeochemical processes taking place within sediments proved to be efficient in preventing polluted water from infiltrating into lower lying soils.

Item Type: Article
Uncontrolled Keywords: chemical oxygen demand, constructed wetland, groundwater, nitrogen, phosphorus, vegetation
Schools: Schools > School of Computing, Science and Engineering
Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Water and Environment Journal
Publisher: Wiley
Refereed: Yes
ISSN: 1747-6585
Related URLs:
Funders: University of Edinburgh and the China Scholarship Council, Scientific and Technological Research Council of Turkey
Depositing User: Institutional Repository
Date Deposited: 16 May 2014 16:44
Last Modified: 30 Nov 2015 23:54
URI: http://usir.salford.ac.uk/id/eprint/31835

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