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  • Title: Phytoremediation of landfill leachate and compost wastewater by irrigation of Populus and Salix: Biomass and growth response.
    Author: Justin MZ, Pajk N, Zupanc V, Zupancic M.
    Journal: Waste Manag; 2010 Jun; 30(6):1032-42. PubMed ID: 20211551.
    Abstract:
    A pot experiment is described with a fast-growing poplar clone and two native willows (Populus deltoides Bartr. cl. I-69/55 (Lux)), Salix viminalis L. and Salix purpurea L.), irrigated with landfill leachate and compost wastewater over a 1-year growing period. The use of leachate resulted in up to 155% increased aboveground biomass compared to control water treatments and in up to 28% reduced aboveground biomass compared to a complete nutrient solution. The use of compost wastewater resulted in up to 62% reduced aboveground biomass compared to the control treatments and in up to 86% reduced aboveground biomass compared to the complete nutrient solution. Populus was the most effective in biomass production due to the highest leaf production, whereas S. purpurea was the least effective in biomass accumulation, but less sensitive to high ionic strength of the irrigation water compared to S. viminalis. The results showed a high potential for landfill leachate application (with up to 2144 kg N ha(-1), 144 kg P ha(-1), 709 kg K ha(-1), 1010 kg Cl ha(-1), and 1678 kg Na ha(-1) average mass load in the experiment). High-strength compost wastewater demonstrated less potential for application as irrigation and fertilization source even in high water-diluted treatments (1:8 by volume).
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