The controlling of landfill leachate evapotranspiration from soil-plant systems with willow: Salix amygdalina L.
The use of willows (Salix amygdalina L) to manage landfill leachate disposal is an effective and cost-effective method due to the high transpiration ability of the willow plants. A 2-year lysimetric experiment was performed to determine an optimum leachate hydraulic loading rate to achieve high evapotranspiration but exert no harmful influence on the plants. The evapotranspiration rate of a soil-plant system planted with the willow was 1.28-5.12-fold higher than the rate measured on a soil surface lacking vegetation, suggesting that soil-willow systems with high volatilization rates are a viable landfill leachate treatment method. Of the soil-willow systems, the one with willow growing on sand amended with sewage sludge soil at an hydraulic loading rate of 1 mm day(-1) performed best, with evapotranspiration ranging from 2.25 to 3.02 mm day(-1) and a biomass yield of 8.0-9.85 Mg dry matter ha(-1). The organic fraction of the soil increased as much as 2.5% of dry matter, due to the sewage sludge input, which exerted a positive effect on the biomass yield as well as on transpiration and evaporation. It was observed that the plants in the sand-and-sewage sludge soil systems displayed higher resistance to toxic effects from the applied landfill leachate relative to plants in the sand-soil systems.
Białowiec
Andrzej
A
The Department of Environmental Biotechnology, The Faculty of Environmental Sciences and Fisheries, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 2, 10-719 Olsztyn, Poland. wbopl@yahoo.co.uk
Wojnowska-Baryła
Irena
I
Hasso-Agopsowicz
Marek
M
D001673:Biodegradation, Environmental; D018526:Plant Transpiration; D032108:Salix / Q000187:drug effects / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry; D012987:Soil; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity
D012722:Sewage; D012987:Soil; D014874:Water Pollutants, Chemical