The Controlling Of Landfill Leachate Evapotranspiration From Soil–Plant Systems With Willow: Salix L Amygdalina  

Oleh:

Bialowiec, Andrzej ; Wojnowska-Baryla, Irena ; Hasso-Agopsowicz, Marek

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 25 no. 1 (Feb. 2007), page 61-76.
Topik: Landfill leachate; willow; soil–plant system; evapotranspiration; hydraulic loading rate; wmr 968–2
Fulltext: 61.pdf (266.53KB)

Isi artikel

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.

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