Thermodynamic and kinetic study of the single extraction of mercury from soil using sodium-thiosulfate

Issaro, N.; Besançon, Stéphane; Bermond, Alain

doi:10.1016/j.talanta.2010.07.045

Cited by 20 publications

(10 citation statements)

References 32 publications

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“…Thus, it might be inferred that in places with higher anthropogenic contamination, the presence of mercury species bound to sulphur is higher than in less contaminated samples. In the case of the most contaminated site the rate of extractable Hg using Na 2 S 2 O 3 corresponds with the results reported by Issaro et al (2010). They showed that the extraction yield of Na 2 S 2 O 3 usually reaches 50 ± 5% of Hg obtained by HNO 3 extraction from soils with high Hg levels from agricultural processes near Paris, France.…”

Section: Resultssupporting

confidence: 85%

“…This phase of mercury can be obtained either by aqua regia extraction in a microwave oven (Fernándes-Martínez and Rucandio 2003), or using the saturated Na 2 S solution from the residue remaining after the extraction procedures (Revis et al 1989). The effect of the concentration of Na 2 S 2 O 3 on the extraction efficiency was in detail studied by Issaro et al (2010).…”

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confidence: 99%

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Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

et al. 2014

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The potential bioavailability of Hg from soil might be estimated by a variety of chemical extraction procedures, differing in the extraction agent, its concentration, the sample weight, and the time of extraction. In this study, a comparative analysis of several extraction methods, commonly used for obtaining the mobile and potentially mobilizable phase of the mercury was carried out. Concentrated HNO 3 , 0.01 mol/L Na 2 S 2 O 3 , 0.05 mol/L EDTA and 0.11 mol/L CH 3 COOH were used as the single extraction agents. Moreover, the sequential extraction was performed. This procedure involved the following fractions: water soluble Hg, Hg extracted in acidic conditions, Hg bound to humic substances, elemental Hg and mercury bound to complexes, and residual Hg. The results showed that even strong acid HNO 3 is unable to release the mercury tightly bound to the soil matrix. This particular method with microwave digestion is commonly used for the estimation of anthropogenic pollution. Conversely, the lowest mercury yield was obtained using the acetic acid as the single extraction agent. In this case, the concentrations were below 0.15% of the total Hg content, which is a proportion generally defined as bioavailable to plants.

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Section: Resultssupporting

confidence: 85%

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confidence: 99%

Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

et al. 2014

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“…Low soil:extractant ratios (for example, 1.0 g:100 mL or 1.5 g:100 mL) favour mercury extractions [24,28,55], although the analyst should assure sample homogeneity and representativeness and guarantee that detection limits for mercury quantification are achieved. This can be difficult in the water-soluble fraction, even in highly contaminated samples, since it generally represents a very low percentage of total mercury in soil [25].…”

Section: Soil:extractant Ratio and Time Of Extractionmentioning

confidence: 99%

“…Consequently, research dedicated to mercury speciation/fractionation has gained attention in recent years [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Overview and challenges of mercury fractionation and speciation in soils

Reis

Davidson

Vale

et al. 2016

TrAC Trends in Analytical Chemistry

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Analytical procedures to assess mercury speciation in soils still lack consensus. This article presents an overview of the mercury fractionation and speciation procedures used in soils. Mercury fractionation is the most common approach despite the operational definition of the fractions. Application of single extraction procedures that target the water-soluble, exchangeable and acid-soluble fractions and the application of EPA method 3200 for mercury sequential extraction are examined in soils with different physicochemical characteristics. A step forward in mercury speciation is thermo-desorption, a useful tool to rapidly obtain needed information about contaminated soils. The advantages and limitations of these procedures are compared; the importance of soils’ physicochemical characteristics highlighted. Criteria to be considered when choosing a suitable method are given - assessing total mercury concentration, soil physicochemical characteristics, environmental conditions, and legislation. It is recommended that the interpretation of results is done wisely, to correctly support decisions concerning intervention strategies at contaminated sites

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“…Thiosulfate salts are also suggested as the leaching reagent for the extraction of mercury from mercury-containing soil. Issaro et al [28] reported that 50% ± 5% of mercury can be extracted from contaminated soil after leaching with 0.01 M Na 2 S 2 O 3 for about 24 h. Lu et al [29] examined the effect of thiosulfate on mercury removal, and reported that Na 2 S 2 O 3 can be used as a chemical aid for improving trace mercury removal. However, since mercury may be present in various forms in contaminated wastes, detailed information on leaching behavior and mechanisms of different mercury components in the thiosulfate leaching system is lacking.…”

Section: Introductionmentioning

confidence: 99%

Study on the Leaching of Mercuric Oxide with Thiosulfate Solutions

Han

Wang

Xie

2016

Metals

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Abstract:Mercury is receiving more concern due to its high mobility and high toxicity to human health and the environment. Restrictive legislations and world-wide efforts have been made on mercury control, especially the release and disposal of mercury-contaminated wastes. This paper describes a novel technology for detoxifying mercury-containing solid wastes with thiosulfate salts. Various parameters which may potentially influence mercury extraction from mercuric oxide with the thiosulfate leaching system-including reagent concentration, solution pH, and temperature-have been examined. The experimental results show that virtually all mercuric oxide can rapidly dissolve into the thiosulfate leaching system under optimized experimental conditions, indicating that thiosulfate is an effective lixivant for recovering mercury from mercury-containing solid waste.

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Thermodynamic and kinetic study of the single extraction of mercury from soil using sodium-thiosulfate

Cited by 20 publications

References 32 publications

Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

Overview and challenges of mercury fractionation and speciation in soils

Study on the Leaching of Mercuric Oxide with Thiosulfate Solutions

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