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- W339879076 abstract "Uptake of metals by whole Eichhornia crassipes plants and excised roots was studied using a bioassay system. Results indicate that in time-series bioassay at concentration of 10 mg L−1 of either Zn or Cu, rapid uptake by whole plants occurred during the first 4 h, but subsequently levelled off after 48 h. A greater proportion of metals absorbed remain in the root system rather than being translocated to other parts of plant. When treated with different combinations of both Cu and Zn, some synergistic effect of metals appeared to have occurred as indicated by enhanced uptake when bioassays involved combination of metals. Absorption kinetics of monovalent K+ by excised Eichhornia roots after a 24-h treatment, indicated an initial linear trend over the range of 1–10 mg K L−1, but subsequently levelled off at 15 mg K L−1 concentration with Vmax of 7.5 × 10–6 M K g−1 dry tissue h−1 and Km of 1.1 × 10−3 M K. Potentiometric titrations revealed existence of pH-dependent charge densities on root system which have variable affinities for cations and helps explain the ability of Eichhornia roots to absorb and accumulate large amounts of metal ions especially at high pH of media." @default.
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- W339879076 date "1990-07-01" @default.
- W339879076 modified "2023-09-23" @default.
- W339879076 title "The absorption of metal ions by<i>Eichhornia crassipes</i>" @default.
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- W339879076 doi "https://doi.org/10.1080/09542299.1990.11083128" @default.
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