Evaluation of remediation techniques in soils affected by residual contamination with heavy metals and arsenic

García-Carmona, Minerva; Romero‐Freire, Ana; Aragón, Manuel Sierra; Garzón, F.J. Martínez

doi:10.1016/j.jenvman.2016.12.041

Cited by 86 publications

(35 citation statements)

References 44 publications

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“…The most significant change in this sector affected to the EC; in this case, the initial mean values of this property were above 4 dS m −1 in all studied depths (up to 50 cm) and twenty years after the recovery and bioremediation treatments these mean values significantly decreased below 0.4 dS m −1 for all studied depths. The decrease in the EC over time in this type of pollution is considered an indicator of the degree of pollution [27], the significant reduction in S2 in relation to S1 could be related to the better evolution of the soils in the S2 and the presence of residual pollution in the S1 soils.…”

Section: Depthmentioning

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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Section: Depthmentioning

confidence: 99%

Evolution of the Residual Pollution in Soils after Bioremediation Treatments

et al. 2020

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“…Biopiles improved soil properties and reduced the solubility of contaminants [26] Zn, Cu Bioremediation using Rhodobacter sphaeroides [27] Microbial electrochemical system (MES)…”

Section: Type Of Remediation Pollutantmentioning

confidence: 99%

Introductory Chapter: Soil Contamination and Alternatives for Sustainable Development

Vázquez-Luna¹,

Cuevas-Díaz²

2019

Soil Contamination and Alternatives for Sustainable Development

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“…Advantages and disadvantages of biological, physical-chemical, and thermal treatments for arsenic, cadmium, and mercury remediation. Adapted from [16] and [17]. The remediation of environments contaminated with potential toxic elements by chemical methods can be excessively expensive due to the specificity of potential toxic elements reactivity.…”

Section: Introductionmentioning

confidence: 99%

Remediation of Potential Toxic Elements from Wastes and Soils: Analysis and Energy Prospects

et al. 2019

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The aim of this study is to evaluate the application of the main hazardous waste management techniques in mining operations and in dumping sites being conscious of the inter-linkages and inter-compartment of the contaminated soils and sediments. For this purpose, a systematic review of the literature on the reduction or elimination of different potential toxic elements was carried out, focusing on As, Cd and Hg as main current contaminant agents. Selected techniques are feasible according to several European countries’ directives, especially in Spain. In the case of arsenic, we verified that there exists a main line that is based on the use of iron minerals and its derivatives. It is important to determine its speciation since As (III) is more toxic and mobile than As (V). For cadmium (II), we observed a certain predominance of the use of biotic techniques, compared to a variety of others. Finally, in mercury case, treatments include a phytoremediation technique using Limnocharis flava and the use of a new natural adsorbent: a modified nanobiocomposite hydrogel. The use of biological treatments is increasingly being studied because they are environmentally friendly, efficient and highly viable in both process and energy terms. The study of techniques for the removal of potential toxic elements should be performed with a focus on the simultaneous removal of several metals, since in nature they do not appear in isolation. Moreover, we found that energy analysis constitutes a limiting factor in relation to the feasibility of these techniques.

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Evaluation of remediation techniques in soils affected by residual contamination with heavy metals and arsenic

Cited by 86 publications

References 44 publications

Evolution of the Residual Pollution in Soils after Bioremediation Treatments

Evolution of the Residual Pollution in Soils after Bioremediation Treatments

Introductory Chapter: Soil Contamination and Alternatives for Sustainable Development

Remediation of Potential Toxic Elements from Wastes and Soils: Analysis and Energy Prospects

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