Extraction of heavy metals in Sydney Harbour sediments using 1M HCl and 0.05M EDTA and implications for sediment‐quality guidelines

McCready, S.; Birch, G.F.; Taylor, S. E.

doi:10.1046/j.1440-0952.2003.00994.x

Cited by 59 publications

(25 citation statements)

References 12 publications

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“…This is because >80% of zinc and lead, in general, was extracted by 1 M HCl, as previously found for Sydney Harbour sediments (McCready et al, 2003). In contrast, substantially poorer correlations (Tables I-II) and relationships with toxicity were obtained with SEM copper than for copper extracted with concentrated acid.…”

Section: Discussionmentioning

confidence: 69%

Relationships Between Toxicity and Concentrations of Chemical Contaminants in Sediments from Sydney Harbour, Australia, and Vicinity

McCready

Birch

Long³

et al. 2006

Environ Monit Assess

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Correlation analyses between measures of toxicity and concentrations of chemical contaminants were conducted for 103 surficial sediments from Sydney Harbour, Australia, and vicinity. Toxicity tests consisted of amphipod survival and reburial tests of whole sediments (Corophium colo), sea urchin fertilisation and larval development tests of pore waters (Heliocidaris tuberculata) and microbial bioluminescence (Microtox) tests of solvent extracts and pore waters. Toxicity in most tests correlated with concentrations of metallic contaminants, in particular, zinc, lead and copper. Organic contaminants did not correlate as significantly with toxicity. However, Heliocidaris tuberculata showed relationships with organochlorine compounds in samples with low to moderate metals contamination. Toxicity in the Microtox solvent extract test appeared to be primarily influenced by the presence of sulfur. This study has no precedent in Australia and the results support the validity of using local indigenous species in toxicity tests of field-collected sediments. This toxicity/chemistry dataset may be used in evaluations of sediment quality guidelines recently introduced to Australia.

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Section: Discussionmentioning

confidence: 69%

Relationships Between Toxicity and Concentrations of Chemical Contaminants in Sediments from Sydney Harbour, Australia, and Vicinity

McCready

Birch

Long³

et al. 2006

Environ Monit Assess

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“…The later extractants may provide more realistic estimate of bioavailability than 1 M HCl. Although metal extractability by 1 M HCl in the sediment samples from Sydney Harbour was high (>80% for Zn and Pb; >60% for Cd and Cu) even then McCready, et al(2003) concluded that 1 M HCl may have application in evaluating potential bioavailability differences for these metals among sediments. The significant positive relationship between metals extracted with single extractants and mobile fraction of metals from sequential extraction procedure suggests that both sequential and single extractants are useful to predict metals bioavailability (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Comparison of extractability of Cd, Cu, Pb and Zn with sequential extraction in contaminated and non-contaminated soils

Kashem

Singh

Kondo³

et al. 2007

Int. J. Environ. Sci. Technol.

107

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ABSTRACT:Various extraction procedures were employed for measuring extractable concentrations of potential toxic elements in soil. The extractability of Cd, Cu, Pb and Zn in four contaminated and four non-contaminated soils of Japan, was compared by single extraction (CaCl 2 , DTPA, NH 4 Cl, 0.1 M HCl and 1 M HCl ) and sequential extraction procedures [(six operationally defined chemical phases, viz. water soluble (F1), exchangeable (F2), carbonate (F3), oxide (F4), organic (F5) and residual (F6) fractions)]. Extractability of metals from soils samples varied depending on metals and/or extractants used. Among the extractants, 1 M HCl extracted the largest proportion of Cd (79 to 96% of total), Cu (61 to 83%), Pb (51 to 99%) and Zn (23 to 52%) from soils followed by 0.1 M HCl, NH 4 Cl, DTPA and CaCl 2 . In all the extractants, the proportion of extractability of metals was higher in the contaminated soils than the non-contaminated soils. Regardless of soils and extractants, relative extractability was higher for Cd as compared to other three metals. The use of 1 M HCl may be recommended for first-level screening of soil contamination with heavy metals. The other four weak extractants are believed to provide a better assessment of bioavailable/mobile metals content in soils than 1 M HCl extractant. However, 0.1 M HCl mobilized all four metals irrespective of soil types, therefore, might be the best choice if only one extractant is to be used. The sequential extraction procedures showed 22 to 64% of total Cd was in the mobile fraction (sum of F1 to F3), while the corresponding values for Cu, Pb and Zn in this fractions were 2 to 23% suggesting higher mobility of Cd than other three metals. The single extraction procedures are simple and easy to perform and obtained results are comparable with sequential extraction procedure.

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“…EDTA is commonly used in soil studies due to a strong chelating ability for a variety of metals (Weimin et al 1992;Sun et al 2001), whereas HCl extraction releases inorganic and organic-associated metals by partial fractionation leaving non-bioavailable metals within the silicate mineral matrix intact (Weimin et al 1992;McCready et al 2003). Approximately 5 g soil in field condition was combined with 25 ml 0.05 M EDTA and 5 g with 25 ml 1 M HCl.…”

Section: Laboratory Techniquesmentioning

confidence: 99%

The Nature and Distribution of Metals in Soils of the Sydney Estuary Catchment, Australia

Birch

Vanderhayden

Olmos

2010

Water Air Soil Pollut

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Total topsoil 50th percentile Cu, Pb and Zn concentrations (n=491) in the Sydney estuary catchment were 23 μgg −1 , 60 μgg −1 and 108 μgg −1 , respectively. Nine percent, 6% and 25% of samples were above soil quality guidelines, respectively and mean enrichment was 14, 35 and 29 times above background, respectively. Soils in the south-eastern region of the catchment exhibited highest metal concentrations. The close relationship between soil metal and road network distributions and outcomes of vehicular emissions modelling, strongly suggested vehicular traffic was the primary source of metals to catchment soils. Catchment soil and road dust probably make an important contribution to contamination of the adjacent estuary. The concentration of soil metals followed the land use trend: industrial> urban>undeveloped areas. A high proportion (mean 45%, 62% and 42%, for Cu, Pb and Zn, respectively) of metals in the soils may be bioavailable.

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Extraction of heavy metals in Sydney Harbour sediments using 1M HCl and 0.05M EDTA and implications for sediment‐quality guidelines

Cited by 59 publications

References 12 publications

Relationships Between Toxicity and Concentrations of Chemical Contaminants in Sediments from Sydney Harbour, Australia, and Vicinity

Relationships Between Toxicity and Concentrations of Chemical Contaminants in Sediments from Sydney Harbour, Australia, and Vicinity

Comparison of extractability of Cd, Cu, Pb and Zn with sequential extraction in contaminated and non-contaminated soils

The Nature and Distribution of Metals in Soils of the Sydney Estuary Catchment, Australia

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