Surface Soil Aggregation, Trace, and Heavy Metal Enrichment Under Long-Term Application of Farm Yard Manure and Mineral Fertilizers

2004 ◽  
Vol 35 (11-12) ◽  
pp. 1505-1516 ◽  
Author(s):  
J. O. Ogunwole ◽  
P. O. Ogunleye
Keyword(s):  
Heavy Metal ◽  
Surface Soil ◽  
Soil Aggregation ◽  
Mineral Fertilizers ◽  
Metal Enrichment ◽  
Farm Yard Manure ◽  
Heavy Metal Enrichment

Seasonality of VAM infection in three populations of Agrostis capillaris (Gramineae) on soil with or without heavy metal enrichment

1992 ◽  
Vol 139 (1) ◽  
pp. 67-73 ◽  
Author(s):  
J. H. Ietswaart ◽  
W. A. J. Griffioen ◽  
W. H. O. Ernst
Keyword(s):  
Heavy Metal ◽  
Metal Enrichment ◽  
Agrostis Capillaris ◽  
Heavy Metal Enrichment

scholarly journals Heavy metal enrichment in the intermediate He-sdOB pulsator Feige 46

2019 ◽  
Vol 629 ◽  
pp. A148 ◽  
Author(s):  
M. Latour ◽  
M. Dorsch ◽  
U. Heber
Keyword(s):  
Heavy Metal ◽  
Chemical Composition ◽  
Optical Spectrum ◽  
Atmospheric Parameters ◽  
Metal Enrichment ◽  
Uv Spectrum ◽  
Abundance Pattern ◽  
Upper Limits ◽  
Kinematic Properties ◽  
Heavy Metal Enrichment

The intermediate He-enriched hot subdwarf star Feige 46 was recently reported as the second member of the V366 Aqr (or He-sdOBV) pulsating class. Feige 46 is very similar to the prototype of the class, LS IV − 14°116, not only in terms of pulsational properties, but also in terms of atmospheric parameters and kinematic properties. LS IV − 14°116 is additionally characterized by a very peculiar chemical composition, with extreme overabundances of the trans-iron elements Ge, Sr, Y, and Zr. We investigate the possibility that the similarity between the two pulsators extends to their chemical composition. We retrieved archived optical and UV spectroscopic observations of Feige 46 and performed an abundance analysis using model atmospheres and synthetic spectra computed with TLUSTY and SYNSPEC. In total, we derived abundances for 16 elements and provide upper limits for four additional elements. Using absorption lines in the optical spectrum of the star we measure an enrichment of more than 10 000× solar for yttrium and zirconium. The UV spectrum revealed that strontium is equally enriched. Our results confirm that Feige 46 is not only a member of the now growing group of heavy metal subdwarfs, but also has an abundance pattern that is remarkably similar to that of LS IV − 14°116.

scholarly journals Soil Heavy Metal Distribution with Depth around a Closed Landfill and Their Uptake by Datura stramonium

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Peace Makuleke ◽  
Veronica M. Ngole-Jeme
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Transfer Coefficient ◽  
Datura Stramonium ◽  
Metal Transfer ◽  
Control Site ◽  
Soil Samples ◽  
Metal Enrichment ◽  
Soil Heavy Metal ◽  
Heavy Metal Enrichment

Landfills are major sources of environmental pollution. This study evaluated heavy metal concentrations in soils and plants around the closed Lumberstewart landfill in Bulawayo, Zimbabwe, to determine the pollution potential of a closed landfill and the risks they present to plants growing in this environment and surrounding communities. Soil samples were collected at depths of 0–30 cm, 30–60 cm, and 60–90 cm around the landfill and at a control site and characterized for various properties and concentrations of Cd, Cu, Cr, Fe, Ni, and Zn. Samples of Datura stramonium, collected from the same sites where soil samples were collected, were also analyzed for the same heavy metals. The soils were sandy, mostly acidic (5.01 < pH < 7.65) with low organic matter content (<2%) and cation exchange capacity (<15 meq/100 g). These properties varied with depth around the landfill. Heavy metals concentrations in the soils and Datura stramonium followed the order Fe > Zn > Cu > Cr > Ni > Cd with samples from around the landfill having higher concentrations than samples from the control site. Soil heavy metal enrichment was highest at a depth of 30–60 cm. Pollution load index (PLI) values indicated that all sites around the landfill were polluted (PLI > 1). Heavy metal transfer coefficient in Datura stramonium ranged between 0.0 and 209 with <60% of the variation observed in heavy metal transfer coefficient in Datura stramonium explained by the extent of heavy metal enrichment in the soils. More than 20 years after closure of the landfill, there are indications that leachate migration may still be going on around the landfill. Monitoring of environments around closed landfills needs to be ongoing to mitigate negative impacts on humans and the environment.

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