Matrix solid phase dispersion-assisted BCR sequential extraction method for metal partitioning in surface estuarine sediments

Martínez-Fernández, Marta; Barciela‐Alonso, María Carmen; Moreda-Piñeiro, Antonio; Bermejo-Barrera, Pilar

doi:10.1016/j.talanta.2010.10.035

Cited by 25 publications

(5 citation statements)

References 26 publications

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“…This type of single-stage extraction is characterized by its simplicity and speed [ 28 ], and it provides important information about the potential risk of transfer between environmental compartments. A number of different extractants have been used with this aim, including water [ 29 ], ammonium acetate [ 30 , 31 ] or chelating agents such as ethylenediamine tetra acetic acid [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Speciation and Mobility of Pb, Zn and Cd in Relation to Transport Processes in a Mining Environment

Elmayel

Esbrí

García-Ordiales

et al. 2020

IJERPH

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Elements in mining extracts can be potentially toxic if they are incorporated into soils, sediments or biota. Numerous approaches have been used to assess this problem, and these include sequential extractions and selective extractions. These two methods have limitations and advantages, and their combined use usually provides a rough estimate of the availability or (bio)availability of potentially toxic elements and, therefore, of their real potential as toxicants in food chains. These indirect speciation data are interesting in absolute terms, but in the work described here, this aspect was developed further by assessing the evolution of availability-related speciation in relation to the transport processes from the emission source, which are mainly fluvial- and wind-driven. This objective was achieved by characterizing tailings samples as the source of elements in soils and sediments at increasing distances to investigate the evolution of certain elements. The standard procedures employed included a sequential five-step extraction and a selective extraction with ammonium acetate. The results show that the highest percentages of Zn and Pb in tailings, soils and sediment samples are associated with oxyhydroxides, along with a significant presence of resistant mineralogical forms. In the case of Cd, its association with organic matter is the second-most important trapping mechanism in the area. The physicochemical mechanisms of transport did not transform the main mineralogical associations (oxyhydroxides and resistant mineralogical forms) along the transects, but they produced a chaotic evolution pattern for the other minor matrix associations for Zn and a decrease in exchangeable and carbonate-bound forms for Pb in soils. Interestingly, in sediments, these mobile forms showed a decrease in Zn and a chaotic evolution for Pb. The most probable reason for these observations is that Zn2+ can form smithsonite (ZnCO3) or hydrozincite (Zn5(CO3)2(OH)6), which explains the retention of a carbonate-bound form for Zn in the soil transect. In contrast, Pb and Cd can appear as different mineral phases. The order of (bio)availability was Pb > Zn > Cd in tailings but Cd > Pb > Zn in soils. The physicochemical processes involved in transport from tailings to soils produce an increase in Cd (bio)availability. The trend is a decrease in bioavailability on moving away from the source (tailings), with maximum values obtained for Cd near to the source area (200–400 m).

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Section: Introductionmentioning

confidence: 99%

Evolution of the Speciation and Mobility of Pb, Zn and Cd in Relation to Transport Processes in a Mining Environment

Elmayel

Esbrí

García-Ordiales

et al. 2020

IJERPH

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“…Soil and sediment samples received much scientific attention because of the significance of element pollution and the threat pollution poses to human health. There are many available SE techniques, with the currently most commonly used variety being the SE technique proposed by the European Community Bureau of References (BCR SE) (Alonso Castillo et al, 2011;Bacon and Davidson, 2008;Canepari et al, 2005;Ciceri et al, 2008;De Andrade Passos et al, 2011;Jamali et al, 2009;Martínez-Fernández et al, 2011;Nemati et al, 2011;Passos et al, 2010;Pérez-Cid et al, 1999;Relić et al, 2013aRelić et al, , 2013bTokaliog̈lu et al, 2010). With used SE we determined acid soluble, reducible, oxidizable and residual fractions of elements in four subsequent steps from soil and sediment samples.…”

Section: Introductionmentioning

confidence: 99%

Ranking and similarity of conventional, microwave and ultrasound element sequential extraction methods

et al. 2018

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This study aims to compare three extraction techniques of four sequential element extraction steps from soil and sediment samples that were taken from the location of the Pančevo petrochemical industry (Serbia). Elements were extracted using three different techniques: conventional, microwave and ultrasound extraction. A novel procedure - sum of the ranking differences (SRD) - was able to rank the techniques and elements, to see whether this method is a suitable tool to reveal the similarities and dissimilarities in element extraction techniques, provided that a proper ranking reference is available. The concentrations of the following elements Al, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Si, Sn, Sr, V and Zn were determined through ICP OES. The different efficiencies and recovery values of element concentrations using each of the three extraction techniques were examined by the CRM BCR-701. By using SRD, we obtained a better separation between the different extraction techniques and steps when we rank their differences among the samples while lower separation was obtained according to analysed elements. Appling this method for ordering the elements could be useful for three purposes: (i) to find possible associations among the elements; (ii) to find possible elements that have outlier concentrations or (iii) detect differences in geochemical origin or behaviour of elements. Cross-validation of the SRD values in combination with cluster and principal component analysis revealed the same groups of extraction steps and techniques.

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“…It is also a harmful environmental pollutant. − Studying the speciation of mercury in FGD gypsum is essential to determine the risk when the wastes are recycled or disposed . The sequential extraction method proposed by the European Community Bureau of Reference (BCR) in 1993 has been widely used to analyze soil and sediments. − The BCR method is based on the solubility of mercury compounds and is commonly used for Hg speciation studies. , The BCR method divides the mercury in the FGD gypsum into five different forms. The forms are water-soluble Hg (F1), weak acid extractable Hg (F2), reducible state Hg (F3), oxidizable state Hg (F4), and residual state Hg (F5).…”

Section: Introductionmentioning

confidence: 99%

Increasing Recovery Ratios with an Improved European Community Bureau of Reference Method for Mercury Analysis in Flue Gas Desulfurization Gypsum

Bian

Zhang

et al. 2018

Energy Fuels

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Coal-fired power plants produce flue gas desulfurization (FGD) gypsum as a byproduct of the sulfur removal process. This gypsum is contaminated with trace elements. Knowing the occurrence and release characteristics of trace elements from the FGD gypsum is very important if the gypsum is to be safely used in different applications. The sequential extraction procedure proposed by the European Community Bureau of Reference (BCR) can be used to provide mercury speciation information for FGD gypsum samples. Many researchers have used the BCR sequential extraction method to analyze the occurrence of mercury in FGD gypsum. Unfortunately, the recovery ratio is low, around 50–60%. The recovery is low because the BCR method does not include the portion of elemental mercury (Hg0) lost during each leaching step. In this work, modifications to the BCR method were made to more accurately determine the amount of mercury lost during the extraction. Using this “improved BCR method”, the Lumex RA-915+/PYRO-915 mercury analyzer measures the mercury content in the residues at each extraction step. The difference between the sample and residue concentrations is equal to the amount of Hg released. This indirect measurement method was used to overcome the shortcomings of the traditional BCR sequential extraction process. The results show that the “improved BCR method” has a recovery ratio of about 99%, which can more accurately evaluate the environmental stability of mercury in gypsum. Thus, an improved five-step sequential extraction procedure for analysis of mercury was successfully applied to FGD gypsum samples in this study.

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Matrix solid phase dispersion-assisted BCR sequential extraction method for metal partitioning in surface estuarine sediments

Cited by 25 publications

References 26 publications

Evolution of the Speciation and Mobility of Pb, Zn and Cd in Relation to Transport Processes in a Mining Environment

Evolution of the Speciation and Mobility of Pb, Zn and Cd in Relation to Transport Processes in a Mining Environment

Ranking and similarity of conventional, microwave and ultrasound element sequential extraction methods

Increasing Recovery Ratios with an Improved European Community Bureau of Reference Method for Mercury Analysis in Flue Gas Desulfurization Gypsum

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