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Focused microwave energy was used to extract 15 PAH from contaminated soil. Microwave irradiation was used to avoid the use of solvents characterized by a small dielectric constant. A water and solvent mixture with different polarities was considered to improve the microwave effect. The decrease in solvatation power caused by the addition of acetone into methylene chloride, is compensated for by...
A standard method of mineralisation for soils and sediments was tested for repeatability and reproducibility by means of an interlaboratory test. This study describes the procedure we used to distinguish the different components of the final uncertainty. A wide range of analytical techniques was used (AAS, AES, ETAAS, ICP-OES, spectrocolorimetry) but all the measurements, realized on the extracts...
This paper presents a method to determine thermodynamic properties of soil organic compounds at 298.15 K: fulvic acids, humic acids, humin, microflora and plants. This method, based on thermodynamic properties of amino acids estimated by Shock and Helgeson (1990), yields results that are compared with those of solid organic compounds. This approach gives information on their solubility.L'energie...
Thallium is a non-essential trace metal that in spite of its acute toxicity to all organisms has not, up to the present time, been extensively studied by the scientific community. The aim of this review is to gather together the more significant and recent data on thallium in soils, ie, range of content, behaviour, regulation and the remediation process.Le thallium est un metal trace non essentiel...
The prediction of soil trace metal bioavailability using extractions has two direct applications: i) evaluation of soil chemical fertility and nutrient deficiency, as has been used widely in different countries for many years; and ii) risk assessment of phytotoxicity and contamination of the food chain induced by polluted soils. In this latter case, few countries have defined guide values. In order...
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