Effects of environmental conditions on the phosphorus distribution of constructed duckweed (Lemna minor) microcosm
by Wenhua Hou, Xiao Chen, Guanling Song, Qunhui Wang, Wei Meng
International Journal of Environment and Pollution (IJEP), Vol. 37, No. 2/3, 2009

Abstract: The restoration of eutrophicated lakes using duckweed plants (Lemna minor) is recognised as a potentially low-cost method. In this study, the effects of environmental conditions on phosphorus (P) distribution were investigated in constructed duckweed microcosms by means of ³²P isotope labelling; ³²P activities in microcosms were monitored to determine P distribution activities. Results indicated that high phosphate, low ammonium concentrations, moderate pH values, and higher environmental temperatures promoted duckweed growth and favoured mobile P release from sediments. Under comfortable conditions, restoration of eutrophic lakes by means of duckweed could, to some extent, reduce internal P loads of lake sediments.

Online publication date: Wed, 13-May-2009

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