scholarly journals Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure

2006 ◽  
Vol 565 (1) ◽  
pp. 63-72 ◽  
Author(s):  
Christine M. Davidson ◽  
Graham J. Urquhart ◽  
Franco Ajmone-Marsan ◽  
Mattia Biasioli ◽  
Armando da Costa Duarte ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Urban Soils ◽  
Toxic Elements ◽  
Extraction Procedure ◽  
Potentially Toxic Elements ◽  
Sequential Extraction Procedure ◽  
European Cities

Environmental Availability of Potentially Toxic Elements in an Agricultural Mediterranean Site

2019 ◽  
Vol 25 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Dimitrios Alexakis ◽  
Dimitra Gamvroula ◽  
Eleni Theofili
Keyword(s):  
Sequential Extraction ◽  
Toxic Elements ◽  
Soil Depth ◽  
Extraction Procedure ◽  
Potential Ecological Risk ◽  
Potentially Toxic Elements ◽  
Geochemical Partitioning ◽  
Exchangeable Fraction ◽  
High Bioavailability

ABSTRACT Total contents of 36 potentially toxic elements are summarized for agricultural topsoil (n = 12; soil depth = 0–20 cm), subsoil (n = 12; soil depth = 20–40 cm), and representative rock samples collected from a Mediterranean site (Megara Plain, Greece). The five-stage sequential extraction procedure for the geochemical partitioning of cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), and nickel (Ni), proposed by Tessier, was applied to topsoil and subsoil collected from the study area. Soil Cd was highly associated with exchangeable fraction, illustrating high bioavailability of this element. The order of mobility of the elements was as follows: Cd > Cu > Co > Zn > Ni > Cr > Mn. Results from sequential extraction experiments illustrated that the bioavailability of Cu, Co, and Zn is moderate, while Ni, Cr, and Mn presented low bioavailability, indicating that these elements could pose a limited threat to the quality of crops. Cadmium is the chief contamination controlling factor posing moderate potential ecological risk. The contamination sources of the examined elements are discussed.

scholarly journals Improvement of the sequential extraction procedure based on supercritical CO2 and subcritical H2O solvents for the estimation of the environmentally mobile potentially toxic element fractions of sediments and soils

2018 ◽  
Vol 67 (1) ◽  
pp. 35-48
Author(s):  
Anita Takács ◽  
Katalin Kovács ◽  
Gábor Halász ◽  
Zoltán Győri ◽  
Ilona Fekete ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Extraction Procedure ◽  
Potentially Toxic Elements ◽  
Toxic Element ◽  
Water Soluble ◽  
Sequential Extraction Procedure ◽  
Mass Ratio ◽  
Fractionation Procedure ◽  
Soils And Sediments ◽  
Element Contents

The estimation of environmental risk caused by pollution with potentially toxic elements (PTE) is usually carried out using the (3+1) step sequential extraction procedure suggested in 1993 by the Community Bureau of Reference (BCR). In the 1st step the water-soluble, exchangeable and carbonate-bound element content is extracted with acetic acid. In 2002 a fractionation procedure based on the application of supercritical CO2, subcritical H2O and of a mixture of subcritical H2O/CO2 was proposed, which allowed the water-soluble and carbonatebound element contents to be extracted separately from sediment or soil samples weighed into the preparative column of a supercritical fluid extractor and diluted with quartz sand in a mass ratio of 1:20. The aim of the present study was to develop a new reduced-size column construction with which this dilution rate could be decreased to 1:2. A kinetic study was performed to determine the extraction time necessary for samples with different carbonate contents and the extracted element contents were compared to the results of the BCR sequential procedure on the same samples. It was established that fractionation using the reduced-size column may be a rapid way to obtain more reliable information on the easily mobilizable (watersoluble and carbonate-bound) PTE content of soils and sediments than was previously available to supplement BCR fractionation.

scholarly journals Sequential extraction procedure to obtain the composition of terrigenous detritus in marine sediments

MethodsX ◽  
2020 ◽  
Vol 7 ◽  
pp. 100888
Author(s):  
Margit H. Simon ◽  
Daniel P. Babin ◽  
Steven L. Goldstein ◽  
Merry Yue Cai ◽  
Tanzhuo Liu ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Marine Sediments ◽  
Extraction Procedure ◽  
Sequential Extraction Procedure

scholarly journals Assessment of potentially reactive pools of aluminum in Andisols using a five-step sequential extraction procedure

2011 ◽  
Vol 57 (4) ◽  
pp. 500-507 ◽  
Author(s):  
Qing-xia Dai ◽  
Noriharu Ae ◽  
Takeshi Suzuki ◽  
Mani Rajkumar ◽  
Shoko Fukunaga ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Extraction Procedure ◽  
Sequential Extraction Procedure
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