Topic
Trace metal
About: Trace metal is a research topic. Over the lifetime, 5125 publications have been published within this topic receiving 181046 citations.
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01 Jan 1994TL;DR: In this article, several aspects of marine trace metal/phytoplankton interactions are examined, including (1) the chemistry of bioactive metals in seawater, (2) the interaction of these metals with PHYTOPLankton at the molecular, cellular, community, and ecosystem levels of biological organization, and (3) the mechanisms by which PHYtoplanka communities regulate the distributions, cycling, and chemical speciation of trace metals.
Abstract: Recent evidence indicates that trace metal nutrients (most importantly iron, and to a lesser extent zinc and manganese) can profoundly influence the productivity, species diversity, and ecological interactions of marine phytoplankton communities. In this chapter, several aspects of marine trace metal/phytoplankton interactions are examined, including (1) the chemistry of bioactive metals in seawater, (2) the interaction of these metals with phytoplankton at the molecular, cellular, community, and ecosystem levels of biological organization, and (3) the mechanisms by which phytoplankton communities regulate the distributions, cycling, and chemical speciation of trace metals. In controlling the chemistry and cycling of metal nutrients, important feedback mechanisms are established, which can have global scale impacts on the physics, chemistry, and biology of the Earth.
74 citations
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TL;DR: It is concluded that the mussels M. galloprovincialis are suitable biomonitors to assess changes in metal pollution in this coastal area of the Black Sea.
74 citations
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TL;DR: In this article, the concentrations of the trace metals Cd, Cu, Fe, Ni, Pb and Zn in the Gota River estuary have been investigated, and the following metal fractions have been determined: acid-leachable, dissolved, labile and particulate.
Abstract: The concentrations of the trace metals Cd, Cu, Fe, Ni, Pb and Zn in the Gota River estuary have been investigated. The following metal fractions have been determined: acid-leachable, dissolved, labile and particulate. The estuary represents a salt wedge type estuary and is situated in a densely populated region of Sweden. The metal concentrations found for the dissolved fraction is in the range of what can be considered as background levels for freshwater. It is difficult to evaluate any estuarine processes other than conservative mixing for Cd, Cu, Ni and Zn. The dissolved levels in the freshwater end member are Cd, 9–25 ngl −1 ; Cu, 1·1–1·4 μgl −1 ; Fe, 20–75 μg l −1 : Ni, 0·7–0·9 μg l −1 : Pb 0·09–0·2 μg l −1 ; and Zn, 6–7 μg l −1 : The results from the acid-leachable fraction show that at high suspended load the particles sediment in the river mouth. The trace metal levels in this fraction are subject to large variations.
74 citations
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TL;DR: It can be concluded from the results of this research that biological recultivation should take into account the existing ecological, vegetation, and floristic potential of an immediate environment that is abundant in life forms and ecological types of plant species that can overgrow the ash deposit relatively quickly.
Abstract: This ecophysiological research on the ash deposits from the “Nikola Tesla–A” thermal power station in Serbia covered 10 plant species (Tamarix gallica, Populus alba, Spiraea van-hauttei, Ambrosia artemisifolia, Amorpha fruticosa, Eupatorium cannabinum, Crepis setosa, Epilobium collinum, Verbascum phlomoides, and Cirsium arvense). This paper presents the results of a water regime analysis, photosynthetic efficiency and trace elements (B, Cu, Mn, Zn, Pb, and Cd) content in vegetative plant parts. Water regime parameters indicate an overall stability in plant-water relations. During the period of summer drought, photosynthetic efficiency (Fv/Fm) was low, ranging from 0.429 to 0.620 for all the species that were analyzed. An analysis of the tissue trace elements content showed a lower trace metal concentration in the plants than in the ash, indicating that heavy metals undergo major concentration during the combustion process and some are not readily taken up by plants. The Zn and Pb concentrations in all of the examined species were normal whereas Cu and Mn concentrations were in the deficiency range. Boron concentrations in plant tissues were high, with some species even showing levels of more than 100 μg/g (Populus sp., Ambrosia sp., Amorpha sp., and Cirsium sp.). The presence of Cd was not detected. In general, it can be concluded from the results of this research that biological recultivation should take into account the existing ecological, vegetation, and floristic potential of an immediate environment that is abundant in life forms and ecological types of plant species that can overgrow the ash deposit relatively quickly. Selected species should be adapted to toxic B concentrations with moderate demands in terms of mineral elements (Cu and Mn).
74 citations
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TL;DR: In this paper, the effects of flooding and drainage on trace metal solubility in paddy soils and to what extent a multi-surface modeling approach can predict trace metal subsumption under changing redox conditions were investigated.
74 citations