Sequential extraction of soils for multielement analysis by ICP-AES

Li, Xiangdong; Coles, Barry J.; Ramsey, Michael H.; Thornton, I.

doi:10.1016/0009-2541(95)00029-l

Cited by 300 publications

(154 citation statements)

References 24 publications

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“…Selected sediment samples were also analysed for chemical partitioning, using a five-step sequential extraction method (Tessier et al, 1979;Li et al, 1995). The same quality control scheme was adopted in the sequential extraction.…”

Section: Analyses Of Trace and Major Elementsmentioning

confidence: 99%

Trace metal distribution in sediments of the Pearl River Estuary and the surrounding coastal area, South China

Zhang

et al. 2007

Environmental Pollution

445

149

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In the present study, surface sediments and sediment cores were collected at the Pearl River Estuary (PRE) and its surrounding coastal area. The samples were analysed for total metal concentrations, metal concentrations in the five operationally defined chemical fractions, and Pb isotopic compositions. The concentrations of Co, Cr, Pb, and Zn of the sediments in the PRE were about twice of those at the adjacent coastal area, while the Cu concentrations of the PRE sediments were four times higher than the sediments at the coastal area. The distribution of Cu, Cr, Pb, and Zn demonstrated a typical diffusion pattern from the land to the direction of the sea. Two hotspots of trace metal contamination were located at the mixed zone between freshwater and marine waters. The distribution of trace metals in sediments showed that the major sources of metal contaminants were probably from the discharges of sewage and other outlets in the west bank of the estuary. The enrichment of metal in the sediments could be attributed to the deposition of the dissolved and particulate trace metals in the water column at the estuarine area. The similar Pb isotopic signatures of the sediments at the PRE and its surrounding coastal area offered strong evidence that the This is the Pre-Published Version.

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Section: Analyses Of Trace and Major Elementsmentioning

confidence: 99%

Trace metal distribution in sediments of the Pearl River Estuary and the surrounding coastal area, South China

Zhang

et al. 2007

Environmental Pollution

445

149

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“…Soils were then analysed by a sequential chemical extraction scheme using the established 5-step Tessier method modified for the analysis of soil samples by ICP-AES (Li et al, 1995). This operationally defined 5-step scheme assesses the association of metals with different soil phases and the implications this has for trace metal mobility and subsequent availability to sensitive environmental receptors.…”

Section: Chemical Speciation Metal Solubility and Bioavailabilitymentioning

confidence: 99%

Urban geochemistry: research strategies to assist risk assessment and remediation of brownfield sites in urban areas

Thornton

Farago

Thums

et al. 2008

Environ Geochem Health

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Urban geochemical maps of Wolverhampton and Nottingham, based on multielements analysis of surface soils, have shown distribution patterns of "total" metals concentrations relating to past and present industrial and domestic land use and transport systems. Several methods have been used to estimate the solubility and potential bioavailability of metals, their mineral forms and potential risks to urban population groups. These include sequential chemical extraction, soil pore water extraction and analysis, mineralogical analysis by scanning electron microscopy, source apportionment by lead isotope analysis, and the development of models to predict metal uptake by home grown vegetables and to provide an estimate of risk from metal consumption and exposure. The results from these research strategies have been integrated by GIS to provide data for future land use planning. KeywordsUrban geochemistry, Wolverhampton, Nottingham, risk assessment, brownfield, metals, chemical speciation, scanning electron microscopy, lead isotopes, predictive modelling of metal solubility and vegetable uptake.

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“…Five operationally defined fractions can be obtained by sequential extraction procedures (Tessier et al, 1979;Li et al, 1995): the exchangeable form (1.0 M MgCl 2 , pH 7.0, for 20 min), the carbonate bound form (1.0 M NaOAc, pH 5.0, for 6 h), the Fe/Mn oxide bound form (reducible phase; 0.04 M NH 2 OHHCl in 25% HOAc at 96C for 6 h), the organic matter/sulfides bound form (oxidized phase; 30% H 2 O 2 at 85C for 3 h) and the residual form (total digestion with a concentrated mixture of HNO 3 and HClO 4 ). After each step, the separation of solid and solution was implemented by centrifuging at 2000 rpm for 15 min.…”

Section: Chemical Analysismentioning

confidence: 99%

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Liu

Shen

et al. 2003

Environmental Pollution

373

159

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analysis identified the heavy metal accumulation layers of sediment profiles and showed the various sources of metals in the estuary. AbstractThe concentrations and chemical partitioning of heavy metals in the sediment cores of the Pearl River Estuary were studied. Based on Pearson correlation coefficients and principal component analysis results, Al was selected as the concentration normalizer for Pb, while Fe was used as the normalizing element for Co, Cu, Ni and Zn. In each profile, sections with metal concentrations exceeding the upper 95% prediction interval of the linear regression model were regarded as metal enrichment layers. The heavy metal accumulation mainly occurred at sites in the western shallow water areas and east channel, which reflected the hydraulic conditions and influence from riparian anthropogenic activities. Heavy metals in the enrichment sections were evaluated by a sequential extraction method for possible chemical forms in sediments. Since the residual, Fe/Mn oxides and organic/sulfide fractions were dominant geochemical phases in the enriched sections, the bioavailability of heavy metals in sediments was generally low. The 206 Pb/ 207 Pb ratios in the metal-enriched sediment sections also revealed the influence of anthropogenic sources. The spatial distribution of cumulative heavy metals in the sediments suggested that the Zn and Cu mainly originated from point sources, while the Pb probably came from non-point sources in the estuary. #

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Sequential extraction of soils for multielement analysis by ICP-AES

Cited by 300 publications

References 24 publications

Trace metal distribution in sediments of the Pearl River Estuary and the surrounding coastal area, South China

Trace metal distribution in sediments of the Pearl River Estuary and the surrounding coastal area, South China

Urban geochemistry: research strategies to assist risk assessment and remediation of brownfield sites in urban areas

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

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