scholarly journals Sequential Extraction Analysis of Arsenic in Soil Samples Collected in an Agricultural Area of Brindisi, Apulia (Italy), in the Proximity of a Coal-Burning Power Plant

2021 ◽  
Vol 11 (5) ◽  
pp. 2115
Author(s):  
Danilo Migoni ◽  
Paride Papadia ◽  
Francesco Cannito ◽  
Francesco Paolo Fanizzi
Keyword(s):  
Power Plant ◽  
Sequential Extraction ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Speciation Analysis ◽  
Abundant Species ◽  
Conveyor Belt ◽  
Soil Samples ◽  
Coal Burning ◽  
Final Residue

In order to evaluate the local environmental risk deriving from coal transport and burning, 30 soil samples were collected along the coal conveyor belt and around the coal-burning power plant Federico II of Brindisi (Apulia, southern Italy). Since soil pollution of metals and metalloids is measured not only by their total concentration but also by evaluating their mobility and availability, arsenic sequential extraction, leaching test and speciation analysis were performed. The analytical results showed that the most abundant As amount was contained in the final residue of the sequential extraction procedure, the so-called occluded As, embedded in rock formations such as sulphides. Moreover speciation chemical analysis showed that As(V) was by far the most abundant species, whereas As(III), which represents the most soluble and available species, was only a very small fraction. No arsenic organic species were detected in the soil samples.

scholarly journals Sequential extraction and thermal desorption of mercury from contaminated soil and tailings from Mongolia

2012 ◽  
Vol 10 (5) ◽  
pp. 1565-1573 ◽  
Author(s):  
Pavel Coufalík ◽  
Pavel Krásenský ◽  
Marek Dosbaba ◽  
Josef Komárek
Keyword(s):  
Sequential Extraction ◽  
Thermal Desorption ◽  
Solid Phase ◽  
Extraction Procedure ◽  
Speciation Analysis ◽  
Water Soluble ◽  
Mercury Species ◽  
Different Temperatures ◽  
Acidic Conditions ◽  
Desorption Method

AbstractMercury forms in contaminated environmental samples were studied by means of sequential extraction and thermal desorption from the solid phase. The sequential extraction procedure involved the following fractions: water soluble mercury, mercury extracted in acidic conditions, mercury bound to humic substances, elemental Hg and mercury bound to complexes, HgS, and residual mercury. In addition to sequential extraction, the distribution of mercury species as a function of soil particles size was studied. The thermal desorption method is based on the thermal decomposition or desorption of Hg compounds at different temperatures. The following four species were observed: Hg0, HgCl2, HgS and Hg(II) bound to humic acids. The Hg release curves from artificial soils and real samples were obtained and their applicability to the speciation analysis was considered.

scholarly journals Measurement of Soluble Arsenic in Soil of Bangladesh by Acid-alkali Sequential Extraction

2008 ◽  
Vol 1 (1) ◽  
pp. 92-107 ◽  
Author(s):  
Mohammad Shafiul Azam ◽  
Md. Shafiquzzaman ◽  
Iori Mishima ◽  
Jun Nakajima
Keyword(s):  
Sequential Extraction ◽  
Soil Phosphorus ◽  
Extraction Procedure ◽  
Soil Surface ◽  
Soil Samples ◽  
Wet Season ◽  
Arsenic Mobility ◽  
Reducing Conditions ◽  
Sequential Extraction Method ◽  
Core Soil

To measure easily soluble fraction of arsenic, a sequential extraction method by 0.1N HCl and 0.1N NaOH was used according to the soil phosphorus extraction procedure. The effects of reducing conditions on arsenic extraction were examined in incubation test. In high reducing conditions arsenic solubility was shown to be high and seemed to be controlled by dissolution of iron oxy-hydroxides. pH played a predominant role in determining the concentrations of soluble arsenic. Arsenic solubility could be possible at low or high pH conditions. Released arsenic in different pH and redox conditions showed that it is a part of acid extractable arsenic which is sorbed weakly on the soil surface and can be extracted during acid-alkali sequential extraction. Therefore, the method could be applicable to measure potential solubility of arsenic as a result of alteration in soil (e.g. redox, pH) and environmental factors. Sequential extraction results of the soil samples collected in dry and wet season suggested that acid-alkali extracted arsenic fractions of surface and core soil samples of paddy field were increased in wet season. They seemed to be moved with irrigation groundwater. Keywords: Acid-alkali extraction; Arsenic contamination; Soil arsenic mobility; Groundwater contamination; Paddy soil.  © 2009 JSR Publications. ISSN: 2070-0237(Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v1i1.1058  

Sequential Extraction Procedure for the Determination of Some Trace Elements in Fertilizer Samples

2014 ◽  
Vol 97 (4) ◽  
pp. 1034-1038 ◽  
Author(s):  
Yunus Emre Unsal ◽  
Mustafa Tuzen ◽  
Mustafa Soylak
Keyword(s):  
Sequential Extraction ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Sequential Extraction Procedure ◽  
Sufficient Information ◽  
Dilute Acid ◽  
Flame Atomic Absorption ◽  
Mn Oxides

Abstract Total concentration of metal ions at trace levels does not give sufficient information about toxicity and biological availability of these elements in fertilizer samples. In the presented work, a sequential extraction procedure modified by the European Community Bureau of Reference (BCR) was applied to fractionate Cd, Cr, Co, Cu, Fe, Pb, Mn, Ni, and Zn levels in two fertilizer samples collected from cooperative agricultural retailers. The fractions extracted were exchangeable/dilute acid soluble, reducible bound to Fe/Mn oxides, oxidizable bound to organic matter and sulfides, and residual. The determination of analyte elements was done by flame atomic absorption spectrometry. The accuracy of the procedure was validated with BCR-701 sediment certified reference material. The RSD of the procedure was less than 10%.

scholarly journals Speciation And Mobility Study Of Selected Heavy Metals In Kofe Dumpsite Soil Of Jimma Town, Jimma, Ethiopia

1970 ◽  
Vol 10 (5) ◽  
pp. 629-641
Author(s):  
Kassim Kedir ◽  
Abera Gure ◽  
Yared Merdassa
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Extraction Procedure ◽  
Soil Samples ◽  
High Tendency ◽  
Depth Profiles ◽  
Flame Atomic Absorption ◽  
Bioavailable Fraction ◽  
Jimma Town ◽  
Vertical Mobility

Speciation and mobility of selected heavy metals including Cd, Pb and Fe were investigated in Kofe dumpsite soils of Jimma Town, Jimma, Ethiopia. To study vertical mobility of the metals, soil samples were collected at three depth profiles comprising surface soil (0-10 cm), subsoil (20-30 cm), and bottom soil (40-50 cm) using soil auger. Similarly, for horizontal mobility assessment, soil samples were collected from 5 m, 10 m and 15 m distances starting from the edge of the dumpsite in east, west, north and south directions. Control soil samples were also collected at the same depth profiles, from 200 m away from the dumpsite. The collected samples were air dried, sieved as well as ground before processing utilizing a Community Bureau of Reference (BCR) sequential extraction procedure. The fraction of the target metals in the extracted samples were then determined by flame atomic absorption spectroscopy (FAAS). The mobility factor (%MF) of the target metals was investigated in both vertical and horizontal variations and the obtained results showed that the target metals have exhibited both vertical and horizontal mobility. The texture, organic matter and pH of the soil samples were also analyzed for correlation study. Variation among obtained results, i.e., %MF and concentration of analytes, were evaluated using one way ANOVA at (P<0.05). It was observed that Cd and Pb exhibited vertical mobility and thus could lead to pollution of the underground water. Similarly, the highest amount of Pb in the bioavailable fraction may also indicate its horizontal mobility and its high tendency to pollute surface water, sediment as well as agricultural products.Key Words: Speciation, Mobility, Sequential extraction, Heavy metals

scholarly journals Speciation Analysis for Heavy Metals in Sediments at Kusaki Dam-Lake with Sequential Extraction Procedure

2010 ◽  
Vol 59 (9) ◽  
pp. 829-837 ◽  
Author(s):  
Koji Nakano ◽  
Masahiro Sato ◽  
Ayako Tsuda ◽  
Haruka Sekiya ◽  
Masanobu Mori ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Extraction Procedure ◽  
Speciation Analysis ◽  
Sequential Extraction Procedure

scholarly journals Metal Speciation in Sediment from Muara Angke, Jakarta Bay Using of BCR Sequential Extraction Procedure

2019 ◽  
Vol 24 (1) ◽  
pp. 23
Author(s):  
Lestari Lestari ◽  
Fitri Budiyanto
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Metal Speciation ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Low Risk ◽  
Sequential Extraction Procedure ◽  
Residual Fraction ◽  
Risk Category ◽  
Bcr Sequential Extraction

The assessment of the biological availability of metals is rarely used only by knowing the total concentration of the metal. Therefore, six sediment samples from Muara Angke, Teluk Jakarta were assessed the chemical speciation of heavy metals. This study aims to determine metal speciation using the BCR sequential extraction procedure and to determine metal speciation to evaluate bioavailability in the sediments of Muara Angke, Jakarta Bay. In sediment from Muara Angke, the ability to move sequence of heavy metals studied was Pb>Zn>Cu>Ni. The mostly accumulated in the non-residual fraction of the total concentrations are Cu, Ni, Pb and Zn which indicated that the mobility and anthropogenic inputs of these metals in Muara Angke were quite high. The Risk Assessment Code (RAC) reveal that Zn and Ni at almost station exist in exchangeable and a fraction of carbonate-bound and therefore high-risk category. Most of the Cu at most of the station is in the oxidizable fraction, except a small portion found at all station is in the exchangeable fraction and fraction of carbonate-bound thus posing a low risk for the waters environment. The patterns of Pb speciation show no to low risk to the waters environment. However, metal observations in the waters are necessary because they are persistent and can accumulate which threatening the water environment.

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