Role of plants in metal cycling in a tidal wetland: Implications for phytoremidiation

摘要: Accumulation of 8 metals and the semimetal As in 29 plant species was quantified a restored tidal wetland on contaminated site. Transfer coefficients between sediment aboveground tissues were lower than many other systems; from 0.013 (Pb) to 0.189 (Mn). A minor fraction metal pool cycled through vegetation (≤0.02%). However, during four years this study, composition changed, biomass as well increased (≤0.12%). Succession either willow dominated brushwood or monospecific reed stand can further enlarge (2.5%). Since amount trace soil suspended solids deposited flooding is some orders magnitude larger pool, phytoextraction not applicable. The growth with low accumulation tissues, e.g. Scirpus maritimus Typha latifolia, may be preferred since might result toxic distribution wider environment.