Soil remediation approach and bacterial community structure in a long-term contaminated soil by a mining spill (Aznalcóllar, Spain)

Paniagua-López, Mario; Vela-Cano, M.; Correa‐Galeote, David; Martín-Peinado, Francisco José; Pozo, Clementina; González‐López, Jesús; Aragón, Manuel Sierra

doi:10.1016/j.scitotenv.2021.145128

Cited by 17 publications

(4 citation statements)

References 82 publications

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“…In the case of bioavailable content (Xx_B) obtained by extraction with EDTA, heavy metal concentrations were even higher in the recovered soil (SR) than in the contaminated one (CS). These results agreed with those reported by [13,56], in which an increase in EDTAextractable Cu, As, Pb and Cd with increasing soil organic matter content was reported, as organic matter can be considered as a key soil property for the extractability of metals by chelators such as EDTA [57,58]. Additionally, the use of the selected amendments decreased for all studied elements their bioavailable content compared to the CS, the application of marble sludge (M) being the remediation technique that showed the highest decrease in bioavailability for all elements.…”

Section: Availability and Solubility Of The Studied Elementssupporting

confidence: 94%

Ecotoxicological Assessment of Polluted Soils One Year after the Application of Different Soil Remediation Techniques

Paniagua-López

Aguilar-Garrido

Contero-Hurtado

et al. 2023

Toxics

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The present work evaluated the influence of eight different soil remediation techniques, based on the use of residual materials (gypsum, marble, vermicompost) on the reduction in metal(loid)s toxicity (Cu, Zn, As, Pb and Cd) in a polluted natural area. Selected remediation treatments were applied in a field exposed to real conditions and they were evaluated one year after the application. More specifically, five ecotoxicological tests were carried out using different organisms on either the solid or the aqueous (leachate) fraction of the amended soils. Likewise, the main soil properties and the total, water-soluble and bioavailable metal fractions were determined to evaluate their influence on soil toxicity. According to the toxicity bioassays performed, the response of organisms to the treatments differed depending on whether the solid or the aqueous fraction was used. Our results highlighted that the use of a single bioassay may not be sufficient as an indicator of toxicity pathways to select soil remediation methods, so that the joint determination of metal availability and ecotoxicological response will be determinant for the correct establishment of any remediation technique carried out under natural conditions. Our results indicated that, of the different treatments used, the best technique for the remediation of metal(loid)s toxicity was the addition of marble sludge with vermicompost.

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Section: Availability and Solubility Of The Studied Elementssupporting

confidence: 94%

Ecotoxicological Assessment of Polluted Soils One Year after the Application of Different Soil Remediation Techniques

Paniagua-López

Aguilar-Garrido

Contero-Hurtado

et al. 2023

Toxics

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“…In both Technosols, As increased in the bioavailable fraction while Pb decreased, which is consistent with previous studies [ 9 , 88 , 89 ], where an increase in organic C can both result in reduced mobility/bioavailability of Pb and increased bioavailability of other PHE (e.g., As). Moreover, when pH was higher than 6.5 in non- or low-carbonated soils such as these Technosols, As bioavailability increases, as it can be desorbed from iron oxides and/or organic matter [ 90 , 91 , 92 ]. The increase of As bioavailability can also be attributed to the increase of extractable P concentration ( Table 1 ) in Technosols [ 9 ], as phosphate anions can compete with As anions for binding sites in soil components, increasing As bioavailability [ 93 ].…”

Section: Resultsmentioning

confidence: 99%

A Green Solution for the Rehabilitation of Marginal Lands: The Case of Lablab purpureus (L.) Sweet Grown in Technosols

Aguilar-Garrido

Reyes-Martín

Vidigal

et al. 2023

Plants

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Reclamation of abandoned mining areas can be a potentially viable solution to tackle three major problems: waste mismanagement, environmental contamination, and growing food demand. This study aims to evaluate the rehabilitation of mining areas into agricultural production areas using integrated biotechnology and combining Technosols with a multipurpose (forage, food, ornamental and medicinal) drought-resistant legume, the Lablab purpureus (L.) Sweet. Two Technosols were prepared by combining gossan waste (GW) from an abandoned mining area with a mix of low-cost organic and inorganic materials. Before and after plant growth, several parameters were analysed, such as soil physicochemical characteristics, nutritional status, bioavailable concentrations of potentially hazardous elements (PHE), soil enzymatic activities, and development and accumulation of PHE in Lablab, among others. Both Technosols improved physicochemical conditions, nutritional status and microbiological activity, and reduced the bioavailability of most PHE (except As) of GW. Lablab thrived in both Technosols and showed PHE accumulation mainly in the roots, with PHE concentrations in the shoots that are safe for cattle and sheep consumption. Thus, this is a potential plant that, in conjunction with Technosols, constitutes a potential integrated biotechnology approach for the conversion of marginal lands, such as abandoned mining areas, into food-production areas.

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“…Tailing dams pose a potential risk to the environment and the safety of people due to the characteristics of the wastes and the intensive storage [18]. The poor management of mining waste has triggered the failure of dams with catastrophic consequences for the environment, as reported in Minas Gerais-Brazil [19,20], Aznalcóllar-Spain [21], and Karamken-Russia [22].…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

et al. 2022

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Mining environmental liabilities (MEL) are of great concern because of potential risks to ecosystems and human health. In this research, the environmental risk (RI) related to MEL existing in three artisanal and small-scale gold-mining areas of Ecuador was evaluated. For this purpose, data of 167 MEL including landfills, mining galleries, tailing deposits, and mineral processing plants from Macuchi, Tenguel–Ponce Enriquez, and Puyango mining areas, were analyzed. The risk assessment related to the presence of waste deposits was carried out based on the methodology proposed by the Spanish Geological Survey. Moreover, the procedure outlined in the Environmental Risk Assessment Guide of the Ministry of Environment of Peru for nonwaste deposits was applied. The highest RI values were identified in Puyango and Tenguel–Ponce Enriquez. Thus, they were both categorized as priority control areas requiring intervention and rehabilitation plans. The MEL that require a high level of intervention include waste deposits and mine entrances associated with potentially toxic elements. Moreover, the point risk maps showed that rivers in the studied areas have a potential pollution risk. This study provides risk levels associated with MEL in mining areas from Ecuador. This information could be used for environmental management and pollution mitigation.

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Soil remediation approach and bacterial community structure in a long-term contaminated soil by a mining spill (Aznalcóllar, Spain)

Cited by 17 publications

References 82 publications

Ecotoxicological Assessment of Polluted Soils One Year after the Application of Different Soil Remediation Techniques

Ecotoxicological Assessment of Polluted Soils One Year after the Application of Different Soil Remediation Techniques

A Green Solution for the Rehabilitation of Marginal Lands: The Case of Lablab purpureus (L.) Sweet Grown in Technosols

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

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