scholarly journals Measuring Soil Metal Bioavailability in Roadside Soils of Different Ages

Environments ◽  
2020 ◽  
Vol 7 (10) ◽  
pp. 91
Author(s):  
Shamali De Silva ◽  
Trang Huynh ◽  
Andrew S. Ball ◽  
Demidu V. Indrapala ◽  
Suzie M. Reichman
Keyword(s):  
Linear Models ◽  
Intrinsic Rate ◽  
Strong Relationship ◽  
Control Site ◽  
Roadside Soil ◽  
Metal Bioavailability ◽  
Roadside Soils ◽  
Metal Concentrations ◽  
Total Metal ◽  
Soil Metal

Finding a reliable method to predict soil metal bioavailability in aged soil continues to be one of the most important problems in contaminated soil chemistry. To investigate the bioavailability of metals aged in soils, we used roadside soils that had accumulated metals from vehicle emissions over a range of years. We collected topsoil (0–10 cm) samples representing new-, medium- and old-aged roadside soils and control site soil. These soils were studied to compare the ability of the diffusive gradients in thin films technique (DGT), soil water extraction, CaCl2 extraction, total metal concentrations and optimised linear models to predict metal bioavailability in wheat plants. The response time for the release of metals and the effect on metal bioavailability in field aged soils was also studied. The DGT, and extractable metals such as CaCl2 extractable and soil solution metals in soil, were not well correlated with metal concentrations in wheat shoots. In comparison, the strongest relationships with concentrations in wheat shoots were found for Ni and Zn total metal concentrations in soil (e.g., Ni r = 0.750, p = 0.005 and Zn r = 0.833, p = 0.001); the correlations were still low, suggesting that total metal concentrations were also not a robust measure of bioavailability. Optimised linear models incorporating soil physiochemical properties and metal extracts together with road age as measure of exposure time, demonstrated a very strong relationship for Mn R2 = 0.936; Ni R2 = 0.936 and Zn R2 = 0.931. While all the models developed were dependent on total soil metal concentrations, models developed for Mn and Zn clearly demonstrated the effect of road age on metal bioavailability. Therefore, the optimised linear models developed have the potential for robustly predicting bioavailable metal concentrations in field soils where the metals have aged in situ. The intrinsic rate of release of metals increased for Mn (R2 = 0.617, p = 0.002) and decreased for Cd (R2 = 0.456, p = 0.096), Cu (R2 = 0.560, p = 0.083) and Zn (R2 =0.578, p = 0.072). Nickel did not show any relationship between dissociation time (Tc) and road age. Roadside soil pH was likely to be the key parameter controlling metal aging in roadside soil.

Metal bioavailability dynamics during a two-year trial using ryegrass (Lolium perenne L.) grown in soils treated with biosolids and metal salts

Soil Research ◽  
2012 ◽  
Vol 50 (4) ◽  
pp. 304 ◽  
Author(s):  
Amanda Black ◽  
Ronald G. McLaren ◽  
Suzanne M. Reichman ◽  
Thomas W. Speir ◽  
Leo M. Condron ◽  
...  
Keyword(s):  
Lolium Perenne ◽  
Metal Salts ◽  
Metal Bioavailability ◽  
Metal Concentrations ◽  
Lolium Perenne L ◽  
Lysimeter Experiment ◽  
Zn Concentration ◽  
Free Ion ◽  
Ion Activity ◽  
Soil Metal

A 24-month field lysimeter experiment using ryegrass (Lolium perenne L.) grown in three soil types was used to investigate metal bioavailability dynamics following amendment with biosolids and metal salts (Cd, Cu, Ni, Zn). Common surrogates of soil metal bioavailability (total soil metal, EDTA, Ca(NO3)2, total dissolved, diffusive gradient in thin film, and modelled free ion activity) were determined on soil samples taken every 6 months. Ryegrass was also harvested every 6 months and analysed for metal concentrations. Across soils and treatments dissolved organic carbon (DOC) and pH decreased, whereas dissolved Ca and Mg increased with time. The free ion activity concentrations of each metal also increased over 24 months, whereas Ca(NO3)2-extracted metals were unchanged. Zinc presented the most changes in bioavailability status, with total Zn concentration decreasing over time, and EDTA-extractable and soil solution Zn increasing significantly by 1.82 mg kg–1 (1.1%) and 1.52 mg L–1 (29%), respectively. Shoot concentration of Zn increased by 1.32 mg kg–1 (2.7%), whereas shoot Ni concentration decreased by 0.65 mg kg–1 (4%). The findings of this study clearly demonstrated that over 24 months, soil metal bioavailability and shoot metal concentrations register only minor changes and appear to be unaffected by soil DOC and pH fluctuations.

Assessment of Heavy Metal Contamination in Roadside Soils along Irbid-Amman Highway, Jordan by ICP-OES

2020 ◽  
Vol 15 (1) ◽  
pp. 1-12
Keyword(s):  
Heavy Metals ◽  
Heavy Metal Contamination ◽  
Soil Samples ◽  
Anthropogenic Sources ◽  
Traffic Density ◽  
Roadside Soil ◽  
Icp Oes ◽  
Roadside Soils ◽  
Metal Concentrations ◽  
The Road

In this study, the concentrations of selected heavy metals (Al, Cd, Cr, Cu, Mn, Pb, Co, Fe, Ni, V and Zn) in roadside soil samples were determined by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) after microwave digestion. A total of sixty roadside soil samples were collected during July 2018 from seventeen sampling sites (5 km apart) from both sides along Irbid-Amman highway, Jordan. The average concentrations (±SD) of the investigated metals in the analyzed soil samples were found to be 18400 (± 11200), 6.0 (± 4.7), 132 (± 47), 49 (± 26), 695 (± 310), 96 (± 53), 78 (± 32), 31800 (± 12600), 116 (± 67), 141 (± 74) and 129 (± 112) µg/g for Al, Cd, Cr, Cu, Mn, Pb, Co, Fe, Ni, V and Zn, respectively. With exception of Mn, the enrichment factors for the investigated metals in roadside soils were found to be more than 10, indicating anthropogenic sources such as automobile traffic. In the absence of any industrial activities in the sampling sites, the high concentrations of the investigated metals suggest that automobile emissions are the major source of roadside soil pollution. The results obtained in this study showed that metal concentrations in the analyzed soil samples are strongly influenced by the wind direction and traffic density in the investigated area. The higher metal concentrations on the west side of the road were due to the easterly prevailing wind in the studied area. As expected, the concentrations of heavy metals decreased with increasing distance from the edge of the road. The results obtained in this work were compared with the literature values.

Heavy metal concentrations in roadside soils of Lithuania's highways

Geologija ◽  
2008 ◽  
Vol 50 (4) ◽  
pp. 237-245 ◽  
Author(s):  
Audronė Jankaitė ◽  
Pranas Baltrėnas ◽  
Agnė Kazlauskienė
Keyword(s):  
Heavy Metal ◽  
Roadside Soils ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations

scholarly journals Mapping the Urban Lead Exposome: A Detailed Analysis of Soil Metal Concentrations at the Household Scale Using Citizen Science

2018 ◽  
Vol 15 (7) ◽  
pp. 1531 ◽  
Author(s):  
Gabriel Filippelli ◽  
Jessica Adamic ◽  
Deborah Nichols ◽  
John Shukle ◽  
Emeline Frix
Keyword(s):  
Citizen Science ◽  
The United States ◽  
Metal Concentrations ◽  
Soil Lead ◽  
Urban Core ◽  
Lead And Zinc ◽  
Property Scale ◽  
Core Soil ◽  
The City ◽  
Soil Metal

An ambitious citizen science effort in the city of Indianapolis (IN, USA) led to the collection and analysis of a large number of samples at the property scale, facilitating the analysis of differences in soil metal concentrations as a function of property location (i.e., dripline, yard, and street) and location within the city. This effort indicated that dripline soils had substantially higher values of lead and zinc than other soil locations on a given property, and this pattern was heightened in properties nearer the urban core. Soil lead values typically exceeded the levels deemed safe for children’s play areas in the United States (<400 ppm), and almost always exceeded safe gardening guidelines (<200 ppm). As a whole, this study identified locations within properties and cities that exhibited the highest exposure risk to children, and also exhibited the power of citizen science to produce data at a spatial scale (i.e., within a property boundary), which is usually impossible to feasibly collect in a typical research study.

scholarly journals Geomorphology as a Driver of Heavy Metal Accumulation Patterns in a Floodplain

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 563 ◽  
Author(s):  
Zsuzsanna Szabó ◽  
Botond Buró ◽  
József Szabó ◽  
Csaba Albert Tóth ◽  
Edina Baranyai ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Linear Models ◽  
Metal Accumulation ◽  
Flow Direction ◽  
Clay Content ◽  
Heavy Metal Accumulation ◽  
Metal Concentrations ◽  
North East ◽  
Point Bars ◽  
Micro Elements

The spatial complexity of floodplains is a function of several processes: hydrodynamics, flow direction, sediment transportation, and land use. Sediments can bind toxic elements, and as there are several pollution sources, the risk of heavy metal accumulation on the floodplains is high. We aimed to determine whether fluvial forms have a role in metal accumulations. Topsoil samples were taken from point bars and swales in the floodplain of the Tisza River, North-East Hungary. Soil properties and metal concentrations were determined, and correlation and hypothesis testing were applied. The results showed that fluvial forms are important drivers of horizontal metal patterns: there were significant differences (p < 0.05) between point bars and swales regarding Fe, K, Mg, Mn, Cr, Cu, Ni, Pb, and Zn. Vertical distribution also differed significantly by fluvial forms: swales had higher metal concentrations in all layers. General Linear Models had different results for macro and micro elements: macro element concentrations were determined by the organic matter, while for micro elements the clay content and the forms were significant explanatory variables. These findings are important for land managers and farmers because heavy metal concentration has a direct impact on living organisms, and the risk of bioaccumulation can be high on floodplains.

Plant metal concentrations in Theobroma cacao as affected by soil metal availability in different soil types

Chemosphere ◽  
2021 ◽  
Vol 262 ◽  
pp. 127749
Author(s):  
Caleb Lewis ◽  
Adrian M. Lennon ◽  
Gaius Eudoxie ◽  
Paramasivam Sivapatham ◽  
Pathmanathan Umaharan
Keyword(s):  
Theobroma Cacao ◽  
Soil Types ◽  
Metal Availability ◽  
Metal Concentrations ◽  
Soil Metal

PLANT GROWTH AND SOIL METAL CONCENTRATIONS A SPATIAL EFFECTS MODEL

2002 ◽  
Vol 2002 (1) ◽  
pp. 194-211
Author(s):  
D.R. Neuman ◽  
S.R. Jennings ◽  
M.K. Reeves
Keyword(s):  
Plant Growth ◽  
Spatial Effects ◽  
Metal Concentrations ◽  
Soil Metal

Total metal concentrations and partitioning of Cd, Cr, Cu, Fe, Ni and Zn in sewage sludge

2000 ◽  
Vol 250 (1-3) ◽  
pp. 9-19 ◽  
Author(s):  
Janez Ščančar ◽  
Radmila Milačič ◽  
Marjeta Stražar ◽  
Olga Burica
Keyword(s):  
Sewage Sludge ◽  
Metal Concentrations ◽  
Total Metal

Free metal activity and total metal concentrations as indices of micronutrient availability to barley [Hordeum vulgare (L.) ?Klages?]

1991 ◽  
Vol 130 (1-2) ◽  
pp. 51-62 ◽  
Author(s):  
P. F. Bell ◽  
R. L. Chaney ◽  
J. S. Angle
Keyword(s):  
Hordeum Vulgare ◽  
Hordeum Vulgare L ◽  
Metal Concentrations ◽  
Total Metal ◽  
Micronutrient Availability ◽  
Free Metal
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