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Phytoremediation of selenium (Se)-containing Hoagland solution and seleniferous soil leachate using two aquatic plants Lemna minor and Egeria densa was evaluated. L. minor showed the highest Se removal efficiency (97%) in the Hoagland solution with a bioconcentration factor (BCF) of 504.35 (±0.83). In artificial soil leachate with addition of 2 mg L⁻¹ MnSO₄, L. minor and E. densa showed a Se removal efficiency of 77% and 60%, respectively. The addition of K₂S₂O₈ decreased the Se uptake by both plants by 40% and the medium pH decreased from 7 to 3, whereas the addition of SO₄²⁻ decreased the removal efficiency of both aquatic plants by 30%, in which only 3% of Se was taken up by the plants. L. minor was selected to remove Se from a real seleniferous soil leachate which contained 74 μg L⁻¹ Se and a 76% efficiency was achieved, with a Se uptake of 29 µg g⁻¹ dry weight and a BCF of 393 …