Chemical and mineralogical forms of Cu and Ni in contaminated soils from the Sudbury mining and smelting region, Canada

Adamo, Paola; Dudka, S.; Wilson, M. J.; McHardy, W. J.

doi:10.1016/0269-7491(95)00035-p

Cited by 139 publications

(70 citation statements)

References 16 publications

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“…Lower contents of Cu are associated with exchangeable and carbonate fractions. This finding is consistent with the pronounced tendency of Cu(II) to form highly stable organic complexes, as already described by several authors (McLaren and Crawford, 1973;Adamo et al, 1996;Barona et al, 1999;Banerjee, 2003), and also reported in many compilations concerning the metal complexes stability (Martell and Smith, 1997;Pettit and Powell, 1993;Martell, 1964, 1971).…”

Section: Resultssupporting

confidence: 91%

Metals distribution in the organic and inorganic fractions of soil: a case study on soils from Sicily

Giacalone

Gianguzza

Orecchio

et al. 2005

Chemical Speciation & Bioavailability

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The content of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn, has been determined in the organic and inorganic fraction of eight soil samples from Sicily. A modified type-Tessier sequential extraction procedure has been used to recognize metals in five different fractions categorised as follows: (a) exchangeable metals, (b) metals bound to carbonates, (c) metals bound to iron and manganese oxides, (d) metals bound to organic matter, and (e) metals in residual fraction. The mineralogical composition of soils samples was characterized by X-ray diffraction. Humic substances were extracted by means of an alkaline extraction procedure. It has been found that both the mineralogical composition and the different content of humic fraction of organic matter in the soils investigated are responsible for the observed trace metal distribution. The obtained data show that a significant amount of trace metals is bound to the organic fraction where different binding sites are present simultaneously. In particular, Pb and Cu seem to be the elements more tightly linked to the organic fraction of soils, whilst cadmium is mostly concentrated into the iron and manganese oxides fraction. The presence of clay minerals in soil is significant for metal distribution, playing a fundamental role in binding metal ions. Besides, it has been observed that the calcophile metal mobility is strongly dependent on the presence of sulfide phases. Applying the Risk Assessment Code to the analyzed soils, it appears that they contain, generally, less than 30% of metals in the exchangeable and carbonate fractions. Calcic brown soil from Piano Zucchi exhibits a medium up to very high risk for Pb, Cd, Co, Zn and Mn. It also been recognized the elevated presence of Cd in the exchangeable and carbonate fractions of andic brown soil on volcanites from Pachino.

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Section: Resultssupporting

confidence: 91%

Metals distribution in the organic and inorganic fractions of soil: a case study on soils from Sicily

Giacalone

Gianguzza

Orecchio

et al. 2005

Chemical Speciation & Bioavailability

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“…Although sequential extraction procedures are operationally defined, and represent pools of heavy metals rather than well-defined geochemical fractions (Barona et al, 2001), it is widely accepted that metal mobilization and bioavailability can be more easily assessed from sequential extraction data than from total metal concentrations (Adamo et al, 1996;Mester et al, 1998). The greater the accumulation of metal in the non-residual fractions, the greater the potential for metal leaching from the soil to occur.…”

Section: Discussionmentioning

confidence: 99%

“…EDTA has been found to be the most efficient chelating agent, and, to date, the best soil amendment treatment for Pb phytoextraction (Huang et al, 1997;Wu et al, 1999). Indeed, EDTA has been used in a number of studies (Adamo et al, 1996;Blaylock et al, 1997;Cooper et al, 1999;Ghestem and Bermond, 1998). On the other hand, when EDTA was used as the chelating agent, the uptake of Pb by Chinese cabbage was reduced.…”

Section: Introductionmentioning

confidence: 99%

Slow release chelate enhancement of lead phytoextraction by corn (Zea mays L.) from contaminated soil—a preliminary study

Wang

Cui

et al. 2005

Science of The Total Environment

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(2005). Slow release chelate enhancement of lead phytoextraction by corn (Zea mays L.) from contaminated soil: A preliminary study. Science of The Total Environment, 339(1-3), 179-187. DOI: 10.1016179-187. DOI: 10. /j.scitotenv.2004 Published in: Science of The Total Environment Queen's University Belfast -Research Portal: Link to publication record in Queen's University Belfast Research Portal General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Abstract Short-term enhancement of lead (Pb) and zinc (Zn) uptake by corn (Zea mays L.) seedlings from a contaminated soil was compared using slow-release coated EDTA granules-a coated chelating agent (CCA), uncoated EDTA granules, and EDTA solution in a greenhouse experiment. Soil Pb and Zn fractions were determined using a sequential extraction scheme. Release of the metals in the soil was examined in a column leaching study. After only 7 days of seedling growth, shoot biomass was decreased by all EDTA treatments compared with the zero-EDTA control. The amount of shoot biomass produced was highest with uncoated EDTA, intermediate with CCA, and lowest with the EDTA solution. Shoot Pb contents were highest with solid EDTA, intermediate with CCA, and lowest with EDTA solution, and they were always higher with EDTA treatments than in controls. In contrast, shoot Zn contents following EDTA treatments were lower than in the control. Levels of soil dissolved organic carbon (DOC) in aqueous soil extracts were much lower after CCA application than following treatments with solid EDTA and EDTA solution. After 17 days of plant growth, when most of the chelating agent had been released from the CCA, soil organic carbon levels remained relatively constant and similar to those in the control, indicating that a relatively low chelating agent concentration can be maintained for the plants to take up the metals. The distribution of Pb in the sequential extraction procedure showed that the Pb level in the exchangeable+carbonate-bound fraction with CCA was significantly lower than that with solid EDTA or EDTA solution, further indicating that slow release of CCA improves the bioavailability of metals in the soil to match plant uptake of those metals. The results suggest that CCA can enhance shoot content of Pb but not of Zn from the contaminated soil in the short term, and may also reduce the risk of metal leaching from the soil. D

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“…Furthermore, because of the predominantly sandy nature of the soil, the metals may have co-precipitated with various silicate species consequent to their adsorption into the mineral lattice (Manceau et al, 1996;Manceau et al, 1999). Previous workers (Adano et al, 1995;Chlopecka et al, 1996) have also reported the presence of cadmium, lead and copper in the residual fraction.…”

mentioning

confidence: 99%

Screening and speciation of heavy metal contaminated soil from an automobile spare-parts market

Asagba

Okieimen

Osokpor

2007

Chemical Speciation & Bioavailability

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The contributions of automobile spare-parts market activities to heavy metals burden and the forms in which some of these metals exist in the soil environment were assessed. Total values of 150.0 mgykg lead, 98.7 mgykg copper, 5.0 mgykg cadmium, 250.3 mgykg manganese, and 14.0 mgykg nickel were obtained on screening the soil in an automobile spare-parts market. Only lead, cadmium and copper were above threshold values and were consequently speciated. Upon speciating, 6.2% lead, 25.7% copper and 52.0% cadmium were potentially bioavailable.

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Chemical and mineralogical forms of Cu and Ni in contaminated soils from the Sudbury mining and smelting region, Canada

Cited by 139 publications

References 16 publications

Metals distribution in the organic and inorganic fractions of soil: a case study on soils from Sicily

Metals distribution in the organic and inorganic fractions of soil: a case study on soils from Sicily

Slow release chelate enhancement of lead phytoextraction by corn (Zea mays L.) from contaminated soil—a preliminary study

Screening and speciation of heavy metal contaminated soil from an automobile spare-parts market

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