A flow system for the determination of metal speciation in soil by sequential extraction

Shiowatana, Juwadee; Tantidanai, Nongnuch; Nookabkaew, Sumontha; Nacapricha, Duangjai

doi:10.1016/s0160-4120(01)00016-2

Cited by 46 publications

(33 citation statements)

References 15 publications

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“…A continuous-flow extraction technique has been proposed by Shiowatana et al (2001) which has the potential to be an effective and accurate method for fractionating arsenic in soil samples. Benefits of the continuous system as compared with the batch system include the removal of errors associated with repeated centrifugation, filtration and washing.…”

Section: Other Approaches Of Extractionmentioning

confidence: 99%

A Review of the Different Methods Applied in Environmental Geochemistry For Single and Sequential Extraction of Trace Elements in Soils and Related Materials

Rao

Sahuquillo

López-Sánchez

2007

Water Air Soil Pollut

444

247

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A comprehensive review of the single and sequential extraction schemes for metal fractionation in environmental samples such as soil and industrially contaminated soils, sewage sludge and sludge amended soils, road dust and run off, waste and miscellaneous materials along with other approaches of sequential extraction methods are being presented. A discussion on the application of chemometric methods in sequential extraction analysis is also being given. The study of single and sequential extraction methods for various reference materials are also being looked into. The review covers several aspects of the single and sequential extraction methodologies. The use of each reagents involved in these schemes are also discussed briefly. Finally the present upto date information by different workers in various fields of environmental geochemistry along with the possible future developments are also being outlined.

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Section: Other Approaches Of Extractionmentioning

confidence: 99%

A Review of the Different Methods Applied in Environmental Geochemistry For Single and Sequential Extraction of Trace Elements in Soils and Related Materials

Rao

Sahuquillo

López-Sánchez

2007

Water Air Soil Pollut

444

247

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“…The final stage (residual fraction), aqua regia extraction, has been employed to assess the residual fraction. Being operationally-defined procedures, sequential extraction inevitably gives results that are highly dependent on the given parameters of the procedure used, such as the extractant (pH, concentration, type), extraction time and temperature, methods of shaking and phase separation (Shiowatana et al 2001). …”

Section: Introductionmentioning

confidence: 99%

Uptake of heavy metals by vegetable plants grown on contaminated soil and their bioavailability in the human gastrointestinal tract

Intawongse

Dean

2006

Food Additives and Contaminants

278

129

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Lettuce, spinach, radish and carrot were grown on compost that had previously been contaminated at different concentrations of Cd, Cu, Mn, Pb and Zn. Control plants of each vegetable were also grown on unadulterated compost. The experiment was carried out under greenhouse conditions. Mature plants were harvested and their roots and leaves collected. Soil samples from each growing pot and plant materials were acid digested and analysed to determine total metal concentration. Flame-Atomic Absorption Spectroscopy (FAAS) was employed to determine metal concentrations in soil and plant samples (Mn and Zn), while Cd, Cu and Pb in plant materials were analysed by Differential Pulse Anodic Stripping Voltammetry (DP-ASV). Soil (BCR 146R and GBW 07310) and plant (tea leaves, INCT-TL-1) certified reference materials were used to assess accuracy and precision. The edible part of plants, i.e. the leaves of lettuce and spinach and the roots of radish and carrot, were also extracted using an in vitro gastrointestinal (GI) extraction to assess metal bioavailability. The results showed that the uptake of Cd, Cu, Mn and Zn by plants corresponded to the increasing level of soil contamination, while the uptake of Pb was low. Soil-to-plant transfer factor (TF) values decreased from Mn ) Zn > Cd > Cu > Pb. Moreover, it was observed from this investigation that individual plant types greatly differ in their metal uptake, e.g. spinach accumulated a high content of Mn and Zn, while relatively lower concentrations were found for Cu and Pb in their tissues. From the in vitro gastrointestinal (GI) study, results indicate that metal bioavailability varied widely from element to element and according to different plant types. The greatest extent of metal releasing was found in lettuce (Mn, 63.7%), radish (Cu, 62.5%), radish (Cd, 54.9%), radish (Mn, 45.8%) and in lettuce (Zn, 45.2%).

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“…Sequential extraction has been widely applied to evaluate the potential mobility of trace elements and how trace elements are linked to soil and sediment phases (Guo et al 2007;Shiowatana et al 2001;Zemberyová et al 2006). It can provide information about the origin, chemical form, source of trace metals (Shiowatana et al 2001;Tessier et al 1979;Zemberyová et al 2006) and has been used to study the bioavailability and fate of metals and metalloids in the environment (Shiowatana et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…It can provide information about the origin, chemical form, source of trace metals (Shiowatana et al 2001;Tessier et al 1979;Zemberyová et al 2006) and has been used to study the bioavailability and fate of metals and metalloids in the environment (Shiowatana et al 2001). Sequential extraction generally follows the sequence: unbuffered salts, weak acids, reducing agents, oxidizing agents, and strong acids (Guo et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Trace Metal Occurrence and Mobility Assessment in Stream Sediments near the Sungun Porphyry Copper Deposit in Northwest Iran

Moore

Aghazadeh

2012

Mine Water Environ

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The Sungun porphyry copper deposit is located 100 km northeast of Tabriz in the Azarbaijan province of Iran. The total concentration and chemical fractionation of metals and metalloids (As, Se, Cd, Cr, Ni, Co, and Zn) in sediment downstream of the Sungun mine was investigated. The degree of contamination was evaluated using the sediment pollution index (SPI) and enrichment factor. The concentrations of As, Cd, Se, and Zn in the contaminated sediments were elevated due to anthropogenic activities. According to the SPI, surface sediments in the ephemeral rivers flowing in the vicinity of the Sungun porphyry copper deposit are classified as natural sediment with no ecological risk, while sediments that received contaminated effluents are classified as slightly polluted. Sequential extraction indicated that Co was principally associated with the iron and manganese oxide fraction, while other elements (As, Zn, Cr, Se, and Ni) were mainly distributed in residual phases. Cadmium is the only element that has a high potential for mobility and bioavailability in the sediments and, of the investigated elements, it poses the greatest potential risk to the local aquatic ecosystems. The chemical fractionation pattern of elements appears to be influenced by industrial effluents. Although the bioavailable fraction of most contaminant metals is low due to the freshness of the sediments, over time, the oxidation of sulfide minerals in these sediments could contribute contaminant elements in soluble form.

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A flow system for the determination of metal speciation in soil by sequential extraction

Cited by 46 publications

References 15 publications

A Review of the Different Methods Applied in Environmental Geochemistry For Single and Sequential Extraction of Trace Elements in Soils and Related Materials

A Review of the Different Methods Applied in Environmental Geochemistry For Single and Sequential Extraction of Trace Elements in Soils and Related Materials

Uptake of heavy metals by vegetable plants grown on contaminated soil and their bioavailability in the human gastrointestinal tract

Trace Metal Occurrence and Mobility Assessment in Stream Sediments near the Sungun Porphyry Copper Deposit in Northwest Iran

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