Selective chemical extraction of heavy metals in tailings and soils contaminated by mining activity: Environmental implications

Favas, Paulo J.C.; Pratas, João; Gomes, M. E. P.; Cala, V.

doi:10.1016/j.gexplo.2011.04.009

Cited by 126 publications

(65 citation statements)

References 47 publications

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“…Similar behaviour for Pb in soils was found in other studies (Cajuste et al, 2000;Shrivastava and Banerjee, 2004;Zhao et al, 2009;Favas et al, 2011;Kabala et al, 2011).…”

Section: Chemical Speciationsupporting

confidence: 89%

Time evolution of Pb(II) speciation in Pampa soil fractions

Ferreyroa

Montenegro

Tudino

et al. 2014

Chemical Speciation & Bioavailability

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Soil pollution by heavy metals, particularly lead, is an important environmental concern; the bioavailability of such pollutants is strongly dependent on their chemical form. Here, the speciation of Pb(II) in soil fractions as a function of time shortly after its incorporation is studied, using a selective sequential extraction method. The sample came from an Argentinean Pampas region and was extensively characterised, including Rietveld analysis of the silt+clay fraction XRD pattern to find the major mineral components. Experiments were run twice, once in the winter and once in the summer. The results show different speciation time profiles in both cases, showing faster changes in winter due to the higher water content. The summer experiment corresponds to an earlier stage in the speciation profile evolution compared with winter. The soluble/ exchangeable fraction decreases with time in summer but shows a lower and constant value in the winter. A high proportion is found to be adsorbed onto the stable (aluminosilicates+quartz) mineral fraction. The results strongly suggest that, even at a short time following soil pollution with Pb, a high proportion is adsorbed onto the mineral fraction, with only a low fraction being bioavailable. The most stable (mineral incorporated) form is observed to increase with time. Soil water content appears to be more important than temperature in determining the differences between the two.

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“…Similar behaviour for Pb in soils was found in other studies (Cajuste et al, 2000;Shrivastava and Banerjee, 2004;Zhao et al, 2009;Favas et al, 2011;Kabala et al, 2011).…”

Section: Chemical Speciationsupporting

confidence: 89%

Time evolution of Pb(II) speciation in Pampa soil fractions

Ferreyroa

Montenegro

Tudino

et al. 2014

Chemical Speciation & Bioavailability

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“…The sequential selective chemical extraction verified that pH is the most important factor in the control of the geochemical distribution of the elements. Consequently a majority of the metallic cations (Mn, Cd, Cu, Zn, Pb, Co, Cr, Ni) show an identical behaviour, presenting important enrichments in the most bioavailable fractions (water soluble and changeable), contrasting with the oxianions, as the As and the Mo, which evidence a lower mobility, due to adsorption to the Fe oxi-hydroxides, revealing important increase of reducible fractions (Favas et al, 2011). Biochemical data show that the studied species are able to provide indications on the pedogeochemical contamination created by different mineralization.…”

Section: Resultsmentioning

confidence: 99%

Heavy metals biogeochemistry in abandoned mining areas

Favas

Pratas

2013

E3S Web of Conferences

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Abstract. Plants growing on the abandoned Portuguese mines, highly contaminated with W, Sn, As, Cd, Cu, Zn and Pb, have been studied for their biogeochemical indication/prospecting and mine restoration potential. The results of analysis show that the species best suited for biogeochemical indicating are: aerial tissues of Halimium umbellatum (L.) Spach, for As and W; leaves of Erica arborea L. for Bi, Sn, W and mostly Pb; stems of Erica arborea L. for Pb; needles of Pinus pinaster Aiton and aerial tissues of Pteridium aquilinum (L.) Kuhn for W; and leaves of Quercus faginea Lam. for Sn. The aquatic plant studied (Ranunculus peltatus Schrank) can be used to decrease the heavy metals, and arsenic amounts into the aquatic environment affected by acid mine drainages.

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“…For most of these, the Mo concentrations exceed those for uncontaminated soils (<10 mg/kg [5]) and upper continental crust (1.1 mg/kg, [26]). Exceptions include soils more than 250 m from the Portuguese Neves Corvo Cu-Pb-Zn mine [27], mine tailings and soils from the Portugues Ervedoa Sn-As mine [28] and rhizosphere soil around the Spanish Panasqueira Sn-W mine [29]. These low concentrations may be due to the distance from the mine, or to low Mo concentrations in the original mine materials and background soils.…”

Section: Molybdenum In Tailings and Mining-affected Soils And Sedimentsmentioning

confidence: 99%

“…The moderately reducible fraction, representing metals bound to long-range-order Fe, Al and Mn (oxy) hydroxides and well-crystallised ferric hydroxysulfates, accounted for the 5.8%-100% of the total Mo [28]. Molybdenum was also extracted in the primary sulfide (0.0%-43.76%), organic matter (0.0%-7.1%) and residual fractions (0.0%-19.9%).…”

Section: Mineralogy Of Mo In Mine Wastesmentioning

confidence: 99%

“…7 Huang et al [14] Balya mine, Turkey Pb-Zn-Ag early 1880s-late 1940s Kocacay river water arid 1.12; 1. 28 Aykol et al [21] San Telmo mine, Iberian Pyrite Belt, Spain Cu 1970-1989 Acid mine drainage, leachate, pH 0.16-0. 82 10,400 Sánchez-España et al [7] Antamina mine, Peru Cu-Zn-Mo 2002-present Mine drainage, pH 2.2-8.4, median 7.9 10-13,900 Skierszkan et al [8] Machalí, Cachapoal Province, Chile Cu porphyry 1819-present Tailings impoundment channel water 2670-3900 Smuda et al [9] Nickel Rim mine, Sudbury, Canada Ni-Cu 1953-1958 Tailings pore water <0.…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

Frascoli

Hudson‐Edwards

2018

Minerals

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Abstract:Molybdenum is an essential element for life, with growing production due to a constantly expanding variety of industrial applications. The potentially harmful effects of Mo on the environment, and on human and ecosystem health, require knowledge of Mo behavior in mining-affected environments. Mo is usually present in trace amounts in ore deposits, but mining exploitation can lead to wastes with very high Mo concentrations (up to 4000 mg/kg Mo for tailings), as well as soil, sediments and water contamination in surrounding areas. In mine wastes, molybdenum is liberated from sulfide mineral oxidation and can be sorbed onto secondary Fe(III)-minerals surfaces (jarosite, schwertmannite, ferrihydrite) at moderately acidic waters, or taken up in secondary minerals such as powellite and wulfenite at neutral to alkaline pH. To date, no Mo-metabolising bacteria have been isolated from mine wastes. However, laboratory and in-situ experiments in other types of contaminated land have suggested that several Mo-reducing and -oxidising bacteria may be involved in the cycling of Mo in and from mine wastes, with good potential for bioremediation. Overall, a general lack of data is highlighted, emphasizing the need for further research on the contamination, geochemistry, bio-availability and microbial cycling of Mo in mining-affected environments to improve environmental management and remediation actions.

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Selective chemical extraction of heavy metals in tailings and soils contaminated by mining activity: Environmental implications

Cited by 126 publications

References 47 publications

Time evolution of Pb(II) speciation in Pampa soil fractions

Time evolution of Pb(II) speciation in Pampa soil fractions

Heavy metals biogeochemistry in abandoned mining areas

Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

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