Soil-plant relationships and contamination by trace elements: A review of twenty years of experimentation and monitoring after the Aznalcóllar (SW Spain) mine accident

Madejón, Paula; Domínguez, María Teresa; Madejón, Engracia; Cabrera, Francisco; Marañón, Teodoro; Murillo, J.M.

doi:10.1016/j.scitotenv.2017.12.277

Cited by 84 publications

(53 citation statements)

References 148 publications

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“…Since the plants are grown on the soil, this latter is an essential factor in their formation and growth. Therefore, pollution by trace elements has a significant impact on soil, air, and plants 4 .…”

Section: Introductionmentioning

confidence: 99%

Phytochemical screening and analysis of heavy metals of Nerium oleander (L.) leaves

Fliou¹,

Riffi²,

Amechrouq³

et al. 2020

Mediterr.J.Chem.,

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The main objective of this research is studying phytochemical screening of the extracts of polluted Nerium oleander (L.), and unpolluted Nerium oleander (L.) collected from Meknes region (Morocco), and determination of metals concentration that can have harmful effects on human health. In addition, the study provides scientific data.Studies have shown that the two extracts of polluted Nerium oleander (L.) and unpolluted Nerium oleander (L.) plant are rich in flavonoids, catechic and gallic tannins. In contrast, anthracene derivatives and flavonoids are absent. On the other hand, the comparative analysis of the results of atomic absorption spectrometry showed that the two plants of polluted Nerium oleander (L.) and unpolluted Nerium oleander (L.) contain a fairly high content of Na, Ca and Mg while the Pb concentration has exceeded the standard given by the WHO. While lithium and iron are present in low concentrations.

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Section: Introductionmentioning

confidence: 99%

Phytochemical screening and analysis of heavy metals of Nerium oleander (L.) leaves

Fliou¹,

Riffi²,

Amechrouq³

et al. 2020

Mediterr.J.Chem.,

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“…The study was conducted at the Guadiamar Green Corridor (SW Spain), an area affected by a large mining accident in 1998 (the Aznalcóllar mine spill; Madejón et al, 2018b ). The failure of a large tailings storage facility was one of the largest mining accidents in Europe to the date, which provoked the release of ca.…”

Section: Methodsmentioning

confidence: 99%

Ectomycorrhizal Fungal Communities and Their Functional Traits Mediate Plant–Soil Interactions in Trace Element Contaminated Soils

et al. 2018

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There is an increasing consensus that microbial communities have an important role in mediating ecosystem processes. Trait-based ecology predicts that the impact of the microbial communities on ecosystem functions will be mediated by the expression of their traits at community level. The link between the response of microbial community traits to environmental conditions and its effect on plant functioning is a gap in most current microbial ecology studies. In this study, we analyzed functional traits of ectomycorrhizal fungal species in order to understand the importance of their community assembly for the soil–plant relationships in holm oak trees (Quercus ilex subsp. ballota) growing in a gradient of exposure to anthropogenic trace element (TE) contamination after a metalliferous tailings spill. Particularly, we addressed how the ectomycorrhizal composition and morphological traits at community level mediate plant response to TE contamination and its capacity for phytoremediation. Ectomycorrhizal fungal taxonomy and functional diversity explained a high proportion of variance of tree functional traits, both in roots and leaves. Trees where ectomycorrhizal fungal communities were dominated by the abundant taxa Hebeloma cavipes and Thelephora terrestris showed a conservative root economics spectrum, while trees colonized by rare taxa presented a resource acquisition strategy. Conservative roots presented ectomycorrhizal functional traits characterized by high rhizomorphs formation and low melanization which may be driven by resource limitation. Soil-to-root transfer of TEs was explained substantially by the ectomycorrhizal fungal species composition, with the highest transfer found in trees whose roots were colonized by Hebeloma cavipes. Leaf phosphorus was related to ectomycorrhizal species composition, specifically higher leaf phosphorus was related to the root colonization by Thelephora terrestris. These findings support that ectomycorrhizal fungal community composition and their functional traits mediate plant performance in metal-contaminated soils, and have a high influence on plant capacity for phytoremediation of contaminants. The study also corroborates the overall effects of ectomycorrhizal fungi on ecosystem functioning through their mediation over the plant economics spectrum.

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“…After the accident, one of the main soil restoration programs carried out in Europe was realized by the implication of the Administration, the Universities and other Research Institutions (CSIC) and the investment of 280 M€ for the recovery of the area [12]. The remediation actions were focused on the removal of the tailings and the highly polluted topsoil, the application of organic and inorganic amendments and the phytostabilization with autochthonous vegetation [13]. The remediation actions finalized with the implementation in the whole area of the Guadiamar Green Corridor (GGC) in 2003, designated by the administration as a "protected landscape" were the extractive activities are forbidden (agriculture, grazing, hunting, and fishing), and the main use was focused in recreational or environmental outreach activities.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Residual Pollution in Soils after Bioremediation Treatments

et al. 2020

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This study is focused on one of the most important spills that ever happened in Europe, the Aznalcóllar’s mine spill. The extensive application of phytostabilization in the area led to the implementation of the Guadiamar Green Corridor (GGC). Soil physicochemical properties were analyzed and the total concentration of Pb, As, Zn and Cu was measured by X-ray fluorescence (XRF); bioassay using Lactuca sativa L. was applied to assess potential toxicity. Two decades after the accident, some soils affected by residual contamination continue to appear in the area. According to regulatory levels, Pb and As concentrations are exceeded in around 13%and 70%, respectively, in the uppermost part of the soils (first 10 cm). The change in soil properties after bioremediation treatment positively promoted the reduction in the potential mobility of pollutants by the increase in pH, CaCO3 content and organic carbon. Anyway, the bioassay with Lactuca sativa, indicated that around 25% of the soils showed toxicity by the reduction of the root elongation in relation to the control samples. Our results indicate that monitoring of the GGC is still needed, together with the application of soil recovery measures to reduce the potential toxicity in some sectors of the affected area.

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Soil-plant relationships and contamination by trace elements: A review of twenty years of experimentation and monitoring after the Aznalcóllar (SW Spain) mine accident

Cited by 84 publications

References 148 publications

Phytochemical screening and analysis of heavy metals of Nerium oleander (L.) leaves

Phytochemical screening and analysis of heavy metals of Nerium oleander (L.) leaves

Ectomycorrhizal Fungal Communities and Their Functional Traits Mediate Plant–Soil Interactions in Trace Element Contaminated Soils

Evolution of the Residual Pollution in Soils after Bioremediation Treatments

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