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Removal of some heavy metals from polluted water by aquatic plants: Studies on duckweed and water velvet
AbstractThe uptake of iron and copper by duckweed (Lemna minor L.) and water velvet (Azolla pinnata R.Br) was investigated in solutions enriched with 1·0, 2·0, 4·0 and 8·0 ppm of these two metal ions which were renewed every 2 days over a 14-day test period. The uptake rate of both the metal ions was highest when the initial concentration in the test solutions was 1·0 ppm. The concentrations of iron of copper remaining, after 2 days, in the solutions treated with duckweed or water velvet at 2·0, 4·0 and 8·0 ppm ion level increased over the 14 days, except in solutions treated with water velvet at iron concentrations of 2·0 and 4·0 ppm. The presence of one metal ion in solution decreased the uptake rate of the other metal ion; e.g. when duckweed was kept in a solution containing copper alone at 8·0 ppm level, the value of the metal concentration factor after 14 days was 51·20. However, in the presence of an equal concentration of iron the value of this factor was 26·53, indicating the influence of iron on the uptake rate of copper.
Removal of some heavy metals from polluted water by aquatic plants: Studies on duckweed and water velvet
AbstractThe uptake of iron and copper by duckweed (Lemna minor L.) and water velvet (Azolla pinnata R.Br) was investigated in solutions enriched with 1·0, 2·0, 4·0 and 8·0 ppm of these two metal ions which were renewed every 2 days over a 14-day test period. The uptake rate of both the metal ions was highest when the initial concentration in the test solutions was 1·0 ppm. The concentrations of iron of copper remaining, after 2 days, in the solutions treated with duckweed or water velvet at 2·0, 4·0 and 8·0 ppm ion level increased over the 14 days, except in solutions treated with water velvet at iron concentrations of 2·0 and 4·0 ppm. The presence of one metal ion in solution decreased the uptake rate of the other metal ion; e.g. when duckweed was kept in a solution containing copper alone at 8·0 ppm level, the value of the metal concentration factor after 14 days was 51·20. However, in the presence of an equal concentration of iron the value of this factor was 26·53, indicating the influence of iron on the uptake rate of copper.
Removal of some heavy metals from polluted water by aquatic plants: Studies on duckweed and water velvet
Jain, S.K. (author) / Vasudevan, P. (author) / Jha, N.K. (author)
Biological Wastes ; 28 ; 115-126
1988-09-12
12 pages
Article (Journal)
Electronic Resource
English
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