This study aims to investigate the effect of nutrientconcentration and pH of leachate on growth and nutrientremoval efficiency of duckweed (Lemna minor). A batchexperiment was conducted using pH range of 4-10 and twoinitial leachate dilutions with nutrient concentrations of N (90and 20 mg L -1) and P (76 and 16 mg L-1) and effect of pH andinitial nitrogen (N) and phosphorous (P) contents of naturalleachate was investigated on growth and nutrient removalefficiency of Lemna minor. Nutrient removal rates of duckweedincrease with an increase in initial nutrient concentration ofleachate at all pH levels. At both leachate dilutions, pH range of6-8 with an optimum of 7.1 is good for nutrient removalefficiency of duckweed from leachate. The highest rates ofnitrogen (1.22 g m-2 day-1) and phosphorous (0.95 g m-2 day-1)removal were achieved from more concentrated leachate at pH7.1. Growth rate of duckweed decreases with an increase ininitial nutrient concentration of leachate at all pH levels.Maximum growth rate of duckweed (19.6 g m2 day-1) wasachieved at pH 7.1 from less concentrated leachate. Nitrogenand phosphorous uptake in duckweed biomass was higher inless concentrated leachate at all pH values. Optimum pH for Nand P uptake by Lemna minor is 7.1 at both leachate dilutions.At this pH duckweed showed 94 % and 91 % uptake of N and Prespectively from less concentrated leachate
