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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TL;DR: In this article, the Lagrangian chemical transport model was used to determine the flux of trace metals into the Arctic atmosphere between 0 and 3.5 km altitude for the period July 1979-June 1980.
61 citations
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TL;DR: Assessment of the effect of time on chemical extractability and concentration of Cd, Cu, Ni, and Zn in plants on plots established by a single application of biosolids with high trace metals content in 1984 found metal concentrations in plant tissue exhibited a plateau response in most cases.
Abstract: ted the calculation of allowable pollutant concentration in biosolids for each trace element (USEPA, 1993). The Concerns over the possible increase in phytoavailability of biosolids-applied trace metals to plants have been raised based on the Part 503 rule permits application of biosolids’ trace eleassumption that decomposition of applied organic matter would in- ments to agricultural land until the Cumulative Pollutcrease phytoavailability. The objectives of this study were to assess ant Loading Rate for the most restrictive trace element the effect of time on chemical extractability and concentration of Cd, is reached. Cu, Ni, and Zn in plants on plots established by a single application The protectiveness of the Part 503 rule has been quesof biosolids with high trace metals content in 1984. Biosolids were tioned over some assumptions made in the underlying applied to 1.5 by 2.3 m confined plots of a Davidson clay loam (clayey, risk assessment (McBride, 1995; Harrison et al., 1997). kaolinitic, thermic Rhodic Kandiudults) at 0, 42, 84, 126, 168, and 210 Change in pollutant bioavailability after termination of Mg ha 1 . The highest biosolids application supplied 4.5, 760, 43, and biosolids application and the relationship between plant 620 kg ha 1 of Cd, Cu, Ni, and Zn, respectively. Radish (Raphanus sativus L.), romaine lettuce (Lactuca sativa L. var. longifolia), and metal uptake and time after application and metal loadbarley (Hordeum vulgareL.) were planted at the site for 3 consecutive ing are still contentious. Harrison et al. (1997) argued years, 17 to 19 yr after biosolids application. Extractable Cd, Cu, that the USEPA analysis did not adequately consider Ni, and Zn (as measured by DTPA, CaCl2, and Mehlich-1) were the variability in plant accumulation and soil sorption determined on 15-cm depth samples from each plot. The DTPA- capacity of trace metals. The uptake coefficient (UC)— extractable Cu and Zn decreased by 58 and 42%, respectively, 17 yr the amount of a metal assimilated by a plant relative after application despite a significant reduction in organic matter to the amount applied to the soil—is critical to a number content. Biosolids treatments had no significant effect on crop yield. of the pathways in the risk assessment. The use of geoPlant tissue metal concentrations increased with biosolids rate but metric means to generate the UC for different crops were within the normal range of these crops. Trace metal concentrations in plants generally correlated well with the concentrations ex- has been criticized as oversimplified (Harrison et al., tracted from soil with DTPA, CaCl2, and Mehlich-1. Metal concentra- 1997). This has led some researchers to voice concerns tions in plant tissue exhibited a plateau response in most cases. The that the geometric mean UC values used in the risk uptake coefficient values generated for the different crops were in assessment are low, especially for acid soils which inagreement with the values set by the Part 503 Rule.
61 citations
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TL;DR: Analysis of peat cores from Lochnagar confirmed that they have been contaminated by trace metals, and the mobility of trace metals in the catchment peats is confirmed.
60 citations
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TL;DR: In this paper, laser ablation inductively coupled plasma mass spectrometry was used in a study of minor and trace metal contents of the hard parts of modern shelly organisms from the west coast of Wales.
60 citations
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TL;DR: The benchmark and local study show that trace metal concentrations in seagrass leaves, regardless of the species, can vary over a 100-1000-fold range, and are related to the level of anthropogenic pressure, making seagRasses highly valuable indicators.
60 citations