Effects of tree vegetation and waste amendments on the fractionation of Cr, Cu, Ni, Pb and Zn in polluted mine soils

Asensio, Verónica; Vega, F.A.; Singh, Bal Ram; Covelo, Emma F.

doi:10.1016/j.scitotenv.2012.09.069

Cited by 75 publications

(35 citation statements)

References 31 publications

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“…During the next six days, carbonate mineral in smelting slag was gradually reduced, as was the leachate pH value. As can be seen in Table 4, there exists in the smelting slag Al 3+ , which may react with OH -and then change into 3 , which may in turn intensify the Oxidative dissolution of sulfide [37][38] and result in the reduction of leachate pH value. Fig.…”

Section: Content and Occurrence State Of Metal(loid)s In Sb Smelting mentioning

confidence: 99%

“…This may be because after the first three days of leaching, the enamel surface structure of smelting slag was destroyed and stibnite (Sb 2 S 3 ) was oxidized to SbO 3 -1 in the oxygen-enriched environment to the leachate [39]. The specific reaction is as follows: (2) During the period from days 4 to 12, because of the neutralizing reaction of the carbonate minerals the leachate was weakly alkaline, and there was a certain amount of OH -in the solution, which may react with Al 3+ and Fe 3+ in the leachate, generating gels like Al(OH) 3 and Fe(OH) 3 , which formed a thin film covering the smelting slag surface to prevent further oxidation of stibnite. Moreover, as can be seen from Fig.…”

Section: Content and Occurrence State Of Metal(loid)s In Sb Smelting mentioning

confidence: 99%

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Release Law of Sb, As, and Hg in Antimony Smelting Slag Under Simulated Acid Rain

Zhou¹,

Li²,

Ren³

et al. 2017

Pol. J. Environ. Stud.

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The exploitation and smelting of heavy metals causes serious environmental pollution, which has received extensive attention from researchers all over the world [1][2][3]. The smelting slag produced by the smelting mines is not only land-occupying, but also causes lasting environmental pollution, for large amounts of harmful elements in the smelting slag are released after rain [4][5][6][7]. As the world's largest antimony (Sb) producer, China produces on average 80% of global Sb annually [8].Xikuangshan (XKS) in Hunan, the world's largest Sb mine, is reported to produce 25% of the world's total. The XKS mine has been mining and smelting for almost 120 years. Its longtime and large-scale mining and smelting has produced large amounts of smelting slag. With surface runoff and precipitation infiltration, harmful elements like Sb and the associated elements As and Hg have been released, threatening the environment and human beings [10][11][12][13][14]. When an excessive amount of Sb, As, or Hg enters the human body, it will cause diseases to the liver, skin, tumors, respiratory and cardiovascular systems, and even cancer [15][16][17][18][19]. Sb, As, Hg, and their compounds are listed as pollutants of priority interest by the United States Pol. J. Environ. Stud. Vol. 26, No. 2 (2017), 925-933 Original Research AbstractThis study takes the Southern antimony smelting slag depot in Xikuangshan (XKS) Sb mine in the city of Lengshuijiang, Hunan, China, as the research object and explores the release law of Sb, As, and Hg in smelting slag under different pH-value simulated acid rain by a semi-dynamic leaching experiment of simulating the local rain. The results show that the leachate pH value is positively correlated with the pH value of simulated acid rain, while the leachate conductivity is negatively correlated with it. The leaching rates of As and Hg are negatively correlated with the pH value of the simulated acid rain, while the leaching rate of Sb is positively correlated with it; in the leaching process, the leachate pH value goes downward slowly after shooting up, but the leachate conductivity is continuously reduced; the releasing process of Sb, As, and Hg consists of two stages, and their leaching rate forms such an order as Sb > Hg > As. The diffraction peak intensity of the main mineral composition of quartz and calcite decreases significantly after leaching; the smelting slag's surface becomes less rough than before leaching, with fewer pores and edges, and the contents of S, Si, Al, Fe, Ca, and Sb on the slag surface decrease while the content of O, As, and Hg increases.Keywords: antimony smelting slag, simulated rain, metal(loid)s, release law *e-mail: zsjaw0745@sina.com DOI: 10.15244/pjoes/65470 926 Zhou S., et al. Environmental Protection Agency [20] and the European Union [21].Until the present, studies at home and abroad are mainly on minerals' adsorption of Sb (III and V) and its desorption, as well as Sb smelting slag's impact on the surrounding environment [22][23][24][25][26][27], but f...

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Section: Content and Occurrence State Of Metal(loid)s In Sb Smelting mentioning

confidence: 99%

Section: Content and Occurrence State Of Metal(loid)s In Sb Smelting mentioning

confidence: 99%

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mentioning

confidence: 99%

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Release Law of Sb, As, and Hg in Antimony Smelting Slag Under Simulated Acid Rain

Zhou¹,

Li²,

Ren³

et al. 2017

Pol. J. Environ. Stud.

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“…The presence of vegetation has been shown to have positive effects on contaminated soil, leading to a greater rate of degradation, removal, and mineralisation of wastes than in non-vegetated soils (Gaskin et al, 2008;Gaskin and Benthan, 2010;Zhang et al, 2010). Over the past decade substantial progress has been made in applying phytoremediation to inorganic pollutants such as heavy metals (Bhargava et al, 2012;Asensio et al, 2013) and organic pollutants such as poly-aromatic hydrocarbons (PAH), nutrients and landfill leachate (Schröder et al, 2008;Souza et al, 2013). Most studies have focused on the ability of plants to hyperaccumulate inorganic heavy metals from soils (Kvesitadze et al, 2006), with relatively few exploring the potential of plants to remediate soils contaminated with petroleum hydrocarbons, especially in cold climates (Alkorta and Garbisu, 2001).…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation of hydrocarbon contaminants in subantarctic soils: An effective management option

Bramley-Alves

Wasley

King

et al. 2014

Journal of Environmental Management

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Accidental fuel spills on world heritage subantarctic Macquarie Island have caused considerable contamination. Due to the island's high latitude position, its climate, and its fragile ecosystem, traditional methods of remediation are unsuitable for on-site clean up. We investigated the tolerance of a subantarctic native tussock grass, Poa foliosa (Hook. f.), to Special Antarctic Blend (SAB) diesel fuel and its potential to reduce SAB fuel contamination via phytoremediation. Toxicity of SAB fuel to P. foliosa was assessed in an 8 month laboratory growth trial under growth conditions which simulated the island's environment. Single seedlings were planted into 1 L pots of soil spiked with SAB fuel at concentrations of 1000, 5 000, 10 000, 2000 and 40 000 mg/kg (plus control). Plants were harvested at 0, 2, 4 and 8 months and a range of plant productivity endpoints were measured (biomass production, plant morphology and photosynthetic efficiency). Poa foliosa was highly tolerant across all SAB fuel concentrations tested with respect to biomass, although higher concentrations of 20 000 and 40 000 mg SAB/kg soil caused slight reductions in leaf length, width and area. To assess the phytoremediation potential of P. foliosa (to 10 000 mg/kg), soil from the planted pots was compared with that from paired unplanted pots at each SAB fuel concentration. The effect of the plant on SAB fuel concentrations and the associated microbial communities found within the soil (total heterotrophs and hydrocarbon degraders) were compared between planted and unplanted treatments at the 0, 2, 4 and 8 month harvest periods. The presence of plants resulted in significantly less SAB fuel in soils at 2 months and a return to background concentration by 8 months. Microbes did not appear to be the sole driving force behind the observed hydrocarbon loss. This study provides evidence that phytoremediation using P. foliosa is a valuable remediation option for use at Macquarie Island, and may be applicable to the management of fuel spills in other cold climate regions. AbstractAccidental fuel spills on world heritage subantarctic Macquarie Island have caused considerable contamination. Due to the island's high latitude position, its climate, and its fragile ecosystem, traditional methods of remediation are unsuitable for on-site clean up. We investigated the tolerance of a subantarctic native tussock grass, Poa foliosa (Hook. f.), to Special Antarctic Blend (SAB) diesel fuel and its potential to reduce SAB fuel contamination via phytoremediation. Toxicity of SAB fuel to P. foliosa was assessed in an 8 month laboratory growth trial under growth conditions which simulated the island's environment. Single seedlings were planted into 1 L pots of soil spiked with SAB fuel at concentrations of 1 000, 5 000, 10 000, 20 00 and 40 000 mg/kg (plus control). Plants were harvested at 0, 2, 4 and 8 months and a range of plant productivity endpoints were measured (biomass production, plant morphology and photosynthetic efficiency). Poa foliosa was highl...

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“…Mine wastes can cause significant environmental problems in the surrounding areas if they are not reclaimed [4], remaining exposed to different forms of erosion leading to heavy metal pollution. The heavy metal pollution in the environment often has a catastrophic impact on the structure and floristic composition of plant communities [36].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of plant species during phytostabilisation of copper mine tailings and pyrite soils, Western Uganda

Ssenku¹,

Ntale²,

Backéus³

et al. 2014

J Environ Eng Ecol Sci

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Introduction: Destruction of vegetation resources emanating from deposition of mine wastes is a serious environmental problem. Conventional plant species restoration methodologies are costly and feasible only on a small scale. The current study was focussed on developing phytostabilisation protocols involving the application of limestone, compost, selected tree species and assessing the re-establishment of plants in polluted soils. Methods: Early establishment of plant species under Eucalyptus grandis, Senna siamea and Leucaena leucocephala planted on mine tailings and pyrite soils amended with compost, limestone and limestone+compost was studied. Four plant inventories were conducted on the study plots and surrounding plant communities, involving enumeration of the plant species and estimation of their ground covers. Physico-chemical characteristics of the soils of the study plots were determined each time an inventory was conducted. Data were analysed using R statistical packages vegan and lme4. Results: Mine tailings and pyrite soils had extremely low pH, poor nutritional status, low organic matter content and elevated concentrations of heavy metals as compared to the unpolluted soils. Before treatment, species richness, diversity and plant cover were extremely low with most of the ground being completely bare. Treatment of the soils significantly improved the physico-chemical characteristics starting a plant succession that increased the number of species from 18 to 215 different species, belonging to 131 genera and 34 families. Plots of the leguminous tree species Senna siamea and Leucaena leucocephala had significantly more species than the non-leguminous Eucalyptus grandis. Early changes in species composition of the restoration plots were minimal. Correspondence analysis (CA) revealed significant differences in species composition between the experimental plots and the plots at the unpolluted site. Conclusion: Application of amendment material that significantly alters the physico-chemical characteristics of mine wastes is pre-requisite for their phytostabilisation. Leguminous tree species Senna siamea and Leucaena leucocephala have a higher potential for phytostabilisation of pyrite and copper tailings as their growth led to the establishment of understory plant communities with higher species diversity and cover.

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Effects of tree vegetation and waste amendments on the fractionation of Cr, Cu, Ni, Pb and Zn in polluted mine soils

Cited by 75 publications

References 31 publications

Release Law of Sb, As, and Hg in Antimony Smelting Slag Under Simulated Acid Rain

Release Law of Sb, As, and Hg in Antimony Smelting Slag Under Simulated Acid Rain

Phytoremediation of hydrocarbon contaminants in subantarctic soils: An effective management option

Dynamics of plant species during phytostabilisation of copper mine tailings and pyrite soils, Western Uganda

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