Some Experiments on Extraction of Heavy Metals Present in Soil

Calvet, Raoul; Bourgeois, S.; Msaky, J. J.

doi:10.1080/03067319008027680

Cited by 58 publications

(24 citation statements)

References 18 publications

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“…Nonselectivity of the reagents and trace element redistributions among phases during fractionation are the main problems reported (Rendell and Batley, 1980;Tipping et al, 1985;Belzile et al, 1989;Bermond and Sommer, 1989;Calvet et al, 1990;Shannon and White, 1991;Bermond, 1992;Bermond and Eustache, 1993;Förstner, 1993;Xiao-Quan and Bin, 1993). Despite all the restrictions, sequential fractionation procedures have proved to be useful in the field of environmental analytical chemistry (Tessier and Campbell, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Tack

Verloo

1996

Science of The Total Environment

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The solid phase distribution of metals in a contaminated dredged sediment as affected by a single reagent extraction (0.5 mol/L NH 4 OAc + 0.02 mol/L EDTA) was studied. A sediment was dried and portions were heated at 250°C and 450°C. From each treatment, a portion was extracted with NH 4 OAc-EDTA. Both the extracted and the unextracted portions were then subjected to a sequential fractionation.NH 4 OAc-EDTA extraction decreased both the acid extractable and the reducible fractions. The oxidizable and residual fractions were not significantly affected. Larger portions of the acid extractable and reducible fractions were extracted with NH 4 OAc-EDTA when the sediment was previously heated at 250°C. After heating the sediment at 450°C the NH 4 OAc-EDTA-extractable portions decreased.Fractionation procedures can provide reliable information on the chemical associations of pollutants in sediments. To estimate short and medium term metal availability, single reagent leaching tests appear more appropriate.

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Section: Introductionmentioning

confidence: 99%

“…Two approaches can be discerned to characterize the pollution status of soils and sediments (Cottenie and Verloo, 1984;Lake et al, 1984;Calvet et al, 1990). The first concerns single reagent extractions to assess mobile and bioavailable fractions of metals.…”

Section: Introductionmentioning

confidence: 99%

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Tack

Verloo

1996

Science of The Total Environment

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“…Such information is valuable for [41] predicting the heavy metal mobility, bioavailability and leaching fractions from the different sampling media [51]. However, there has been criticism regarding the application of sequential extraction procedures [49,[52][53][54]. According to these authors the methods are not entirely specific for the geochemical fraction of the soil and the eluates may also remove metals from other fractions.…”

Section: Sequential Extractionsmentioning

confidence: 99%

Appropriate sampling strategy and analytical methodology to address contamination by industry. Part 2: Geochemistry and speciation analysis

Shtiza

Swennen

2011

Open Geosciences

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Abstract:The degree of contamination in soils, sediments and dusts can be assessed based on knowledge of a variety of factors, such as industrialization, type of contaminants, deposition conditions, contamination-control techniques, along with the characteristics of the recipient environmental compartments, which include pathways for contamination transport, depth of infiltration, and degree of groundwater contamination. The impact of contaminants also depends on the quantity, mobility and speciation of contaminants/wastes as well as on the sensitivity of the recipient compartments. With sufficient knowledge of these factors, a number of conclusions can be drawn concerning the status of contamination in industrialized areas. This literature review aims to scrutinize some of the methods used to analyse the occurrence, speciation, mobility, bioavailability and likely the toxic effects of contaminants in the environment. IntroductionThe intensive industrial production and transformation of ores and metals, and particularly, the transportation and storage of contaminants/wastes in the environment in the last hundred years have produced large quantities of waste. Erosion and weathering of contaminated soils and wastes results in the release of heavy metals and metalloids into nearby rivers and sediments [1]. To * E-mail: aurela_shtiza@yahoo.com; Tel: +3292417738; Fax: +3292424445 investigate the pollution levels and the mobility of the heavy metals and metalloids classical and/or innovative techniques can be used [2]. To measure contamination levels and assess heavy metal mobility is a challenging task because many factors affect the occurrence and the mobility of heavy metals, such as pH, solubility, cation exchange capacity, presence of clays, acid/base neutralizing capacity of soils/sediments, and so on. The selection of an appropriate conceptual sampling model requires that the entire surface under investigation is characterized accurately and any 'hot spots' are properly represented in the sampling inventory [3].The development of a conceptual model and the selection of appropriate sampling media for characterization of con-53 Unauthenticated Download Date | 5/12/18 5:19 PM Appropriate sampling strategy and analytical methodology to address contamination by industry.Part 2: Geochemistry and speciation analysis taminants were addressed in the first part of this article [4]. Once the sampling types are selected and collected, the measurement protocols are applied. An analytical protocol is a specific procedure to make observations, determine the characteristics, and conclusions for each sample or for a group of samples [5]. Analytical chemistry has become the science that does not just provide the results, but the best strategy to measure chemical properties of various sampling media. Selection of appropriate sampling types, sample collection, sample pre-treatment and chemistry analysis are the main subsequent steps that will infer the contamination in a specific site [6]. The aim of this literature review is to ...

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“…The increase or decrease in extractability depends on the nature and chemistry of the considered element and on the nature of the extraction agent used [6,10,11]. Consequently, the extractable metal content may change.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Optimized Homogenization by Ball Mills for Quantitative Chemical Analysis in Sandy Soils

Rudoviča¹,

Tjutrins²,

Vīksna³

et al. 2011

Latvian Journal of Chemistry

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The efficiency of homogenization was studied by examining particle size distribution and element quantification in the sandy soils using the ball mills. The following parameters were optimized -sample volume, oscillation frequency and grinding time. The homogenized soil fraction with ~ 85% of particles with sizes below 40 m was established to give high precision and accuracy of quantitative analysis of the results.

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Some Experiments on Extraction of Heavy Metals Present in Soil

Cited by 58 publications

References 18 publications

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Appropriate sampling strategy and analytical methodology to address contamination by industry. Part 2: Geochemistry and speciation analysis

Investigation of Optimized Homogenization by Ball Mills for Quantitative Chemical Analysis in Sandy Soils

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