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Environments
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Soil Remediation
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Soil Remediation

A special issue of Environments (ISSN 2076-3298).

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 30846

Special Issue Editors

Dr. Manhattan Lebrun

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Guest Editor
INRAE, AgroParisTech, UMR ECOSYS, Université Paris-Saclay, 78850 Thiverval-Grignon, France
Interests: soil pollution; plant and root development; biogeochemical and microbiological processes; plant metal(loid)s accumulation
Special Issues, Collections and Topics in MDPI journals
Dr. Domenico Morabito

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Guest Editor
Université d'Orléans, LBLGC INRA USC1328, rue de Chartres, BP 6759, CEDEX 2, 45067 Orléans, France
Interests: proteomic response to abiotic stresses; phytomanagement; metal(loid) pollution; tree physiology; ecotoxicology; biochar
Special Issues, Collections and Topics in MDPI journals
Dr. Sylvain Bourgerie

E-Mail Website
Guest Editor
Université d'Orléans, LBLGC INRA USC1328, rue de Chartres, BP 6759, CEDEX 2, 45067 Orléans, France
Interests: biochemistry and molecular biology; eco-restoration; soil microbiology; metal(loid) transfer; bioaccumulation; biochar
Special Issues, Collections and Topics in MDPI journals
Dr. Lukas Trakal

E-Mail Website
Guest Editor
Department of Environmental Geosciences, Czech University of Life Sciences Prague, 165 21 Praha, Czech Republic·
Interests: soil chemistry; adsorption; carbon materials; nanoparticles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Anthropogenic activities such as industry, mining extraction, fertilizer use, waste storage, etc. lead to the contamination of soils, which has deleterious impacts on the environment and human health. Therefore, the remediation of these contaminated soils is a crucial challenge. Particularly, the use of sustainable remediation techniques, such as bio- and phyto-remediation, is attracting more and more interest. Moreover, the application of soil amendments—both organic and inorganic—to improve soil conditions, (im)mobilize pollutants, and ameliorate soil biological activities may be required for effective remediation results.

In addition to the removal or immobilisation of the contamination, soil remediation is also beneficial for biodiversity, the reduction of erosion and leaching, and soil functions.

This Special Issue aims at presenting both laboratory and field research, or review papers, demonstrating the effectiveness of sustainable remediation techniques, with an emphasis on the fate of the pollutants and the restoration of soil functions during and after the process.

Keywords

  • soil remediation
  • phytoremediation
  • bioremediation
  • amendments
  • biochar
  • compost
  • oxides
  • plants
  • microorganisms
  • soil functions

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Published Papers (6 papers)

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Research

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17 pages, 2365 KiB  
Article
Microfluidically-Assisted Isolation and Characterization of Achromobacter spanius from Soils for Microbial Degradation of Synthetic Polymers and Organic Solvents
by Ting Xie, J. Michael Köhler, Stefan Heyder, P. Mike Günther and Jialan Cao
Environments 2022, 9(12), 147; https://doi.org/10.3390/environments9120147 - 22 Nov 2022
Cited by 1 | Viewed by 3027
Abstract
A micro segmented-flow approach was utilized for the isolation soil bacteria that can degrade synthetic polymers as polyethylene glycols (PEG) and polyacrylamide (PAM). We had been able to obtain many strains; among them, five Achromobacter spanius strains from soil samples of specific sampling [...] Read more.
A micro segmented-flow approach was utilized for the isolation soil bacteria that can degrade synthetic polymers as polyethylene glycols (PEG) and polyacrylamide (PAM). We had been able to obtain many strains; among them, five Achromobacter spanius strains from soil samples of specific sampling sites that were connected with ancient human impacts. In addition to the characterization of community responses and isolating single strains, this microfluidic approach allowed for investigation of the susceptibility of Achromobacter spanius strains against three synthetic polymers, including PEG, PAM, and Polyvinylpyrrolidone (PVP) and two organic solvents known as 1,4-dioxane and diglyme. The small stepwise variation of effector concentrations in 500 nL droplets provides a detailed reflection of the concentration-dependent response of bacterial growth and endogenous autofluorescence activity. As a result, all five strains can use PEG600 as carbon source. Furthermore, all strains showed similar dose-response characteristics in 1,4-dioxane and diglyme. However, significantly different PAM- and PVP-tolerances were found for these strains. Samples from the surface soil of prehistorical rampart areas supplied a strain capable of degradation of PEG, PVP, and PAM. This study demonstrates on the one hand, the potential of microsegment flow for miniaturized dose-response screening studies and its ability to detect novel strains, and on the other hand, two of five isolated Achromobacter spanius strains may be useful in providing optimal growth conditions in bioremediation and biodegradation processes. Full article
(This article belongs to the Special Issue Soil Remediation)
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21 pages, 854 KiB  
Article
Biochar, Ochre, and Manure Maturation in an Acidic Technosol Helps Stabilize As and Pb in Soil and Allows Its Vegetation by Salix triandra
by Melissa Simiele, Manhattan Lebrun, Sylvain Bourgerie, Dalila Trupiano, Gabriella Stefania Scippa and Domenico Morabito
Environments 2022, 9(7), 87; https://doi.org/10.3390/environments9070087 - 8 Jul 2022
Cited by 1 | Viewed by 3484
Abstract
Past mining extraction activities still have a negative impact in the present time, the resulting metal(loid) contaminated soils affecting both the environment and human health. Assisted phytostabilization technology, combining soil conditioner application to immobilize metal(loid)s and plant growth to reduce erosion and leaching [...] Read more.
Past mining extraction activities still have a negative impact in the present time, the resulting metal(loid) contaminated soils affecting both the environment and human health. Assisted phytostabilization technology, combining soil conditioner application to immobilize metal(loid)s and plant growth to reduce erosion and leaching risks, is a useful strategy in the restoration of metal(loid) contaminated lands. However, contaminants will respond differently to a particular amendment, having their own specific characteristics. Therefore, in multi-contaminated soils, soil conditioner combination has been suggested as a good strategy for metal(loid) immobilization. In the present study, in a mesocosm experiment, organic (biochar and manure) and inorganic (ochre) amendments were evaluated in single and combined applications for their effect on metal(loid) stabilization and Salix triandra growth improvement, in an arsenic and lead highly contaminated soil. Specifically, the effects of these amendments on soil properties, metal(loid) behavior, and plant growth were evaluated after they aged in the soil for 6 months. Results showed that all amendments, except biochar alone, could reduce soil acidity, with the best outcomes obtained with the three amendments combined. The combination of the three soil conditioners has also led to reducing soil lead availability. However, only ochre, alone or combined with the other soil fertilizers, was capable of immobilizing arsenic. Moreover, amendment application enhanced plant growth, without affecting arsenic accumulation. On the contrary, plants grown on all the amended soils, except plants grown on soil added with manure alone, showed higher lead concentration in leaves, which poses a risk of return of lead into the soil when leaves will shed in autumn. Considering that the best plant growth improvement, together with the lowest increase in lead aerial accumulation, was observed in manure-treated soil, the addition of manure seems to have potential in the restoration of arsenic and lead contaminated soil. Full article
(This article belongs to the Special Issue Soil Remediation)
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15 pages, 3283 KiB  
Article
Chemical Stabilization Used to Reduce Geogenic Selenium, Molybdenum, Sulfates and Fluorides Mobility in Rocks and Soils from the Parisian Basin
by Maxime Brandely, Samuel Coussy, Denise Blanc-Biscarat, Remy Gourdon and Gaëtan Blanck
Environments 2022, 9(7), 78; https://doi.org/10.3390/environments9070078 - 25 Jun 2022
Cited by 1 | Viewed by 3556
Abstract
Rocks and soils excavated from civil works frequently present high concentrations of naturally occurring leachable (oxy-)anions. This situation raises concerns regarding the potential transfer of contaminants to groundwater in a storage scenario. This study was carried out to give practical insights on the [...] Read more.
Rocks and soils excavated from civil works frequently present high concentrations of naturally occurring leachable (oxy-)anions. This situation raises concerns regarding the potential transfer of contaminants to groundwater in a storage scenario. This study was carried out to give practical insights on the ability of various stabilizing agents to reduce molybdenum (Mo), selenium (Se), fluorides and sulfates mobility in four types of naturally contaminated excavated materials. Based on standardized leaching tests results, Mo and Se were effectively immobilized after zero valent iron or iron salts additions. Although alkaline materials were found to effectively reduce fluorides and sulfates mobility, their addition occasionally caused a subsequent increase in Mo and Se leaching due to pH increase. None of the reagents tested allowed a simultaneous immobilization of all (oxy-)anions sufficient to reach regulatory threshold values. The remaining difficulties were related to: (i) sulfates leaching from gypsum-rich samples, (ii) fluorides leaching from clayey samples and (iii) Mo and sulfates mobility from tunnel muck. Altogether, the study revealed that the choice of stabilizing agents should be made depending on the speciation of the contaminant or else an opposite impact (i.e., increase in contaminant mobility) might be triggered. Full article
(This article belongs to the Special Issue Soil Remediation)
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15 pages, 1940 KiB  
Article
Enhanced As, Pb and Zn Uptake by Helianthus annuus from a Heavily Contaminated Mining Soil Amended with EDTA and Olive Mill Wastewater Due to Increased Element Mobilization, as Verified by Sequential Extraction Schemes
by Georgios Kalyvas, Fotis Bilias, Dionisios Gasparatos, Ioannis Zafeiriou, Rania Eissa, Eleftheria Karamountzou and Ioannis Massas
Environments 2022, 9(5), 61; https://doi.org/10.3390/environments9050061 - 16 May 2022
Cited by 4 | Viewed by 4846
Abstract
Soils close to former mines or metallurgical facilities often contain extreme concentrations of potentially toxic elements (PTEs), and among soil remediation actions needed, enhanced phytoextraction techniques using chelating agents could be a very promising option. In this context, a pot experiment was conducted [...] Read more.
Soils close to former mines or metallurgical facilities often contain extreme concentrations of potentially toxic elements (PTEs), and among soil remediation actions needed, enhanced phytoextraction techniques using chelating agents could be a very promising option. In this context, a pot experiment was conducted to evaluate the effect of Na2-EDTA, olive mill wastewater (OMW), and their combination (EDTA + OMW) on As, Pb and Zn uptake by Helianthus annuus (sunflower), grown in a heavily contaminated soil from Lavrio, Greece. After harvest, aboveground and belowground biomass and the concentrations of As, Pb and Zn were determined. Additionally, composite soil samples of all treatments were subjected to appropriate sequential extraction procedures for each PTE. Results showed that although nonstatistically significant effects on plant growth and As concentration were observed, Pb and Zn plant concentrations increased by the EDTA addition, alone or combined with OMW. When the total bioavailability parameter was assessed, EDTA treatment was also found to significantly enhance As uptake (50% increase, p ≤ 0.05). These results were further supported by the respective sequential extraction schemes in which both Pb and As showed increased concentration in the corresponding more soluble soil fractions, probably as an outcome of partial Fe–Mn amorphous oxide dissolution. Our study thus suggests that the applied treatments of EDTA, OMW or their combined application could play a key role as reductive agents in enhancing the mobility of these PTEs in the soil environment, triggering their increased uptake by H. annuus. Full article
(This article belongs to the Special Issue Soil Remediation)
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Review

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18 pages, 1883 KiB  
Review
Nickel in the Environment: Bioremediation Techniques for Soils with Low or Moderate Contamination in European Union
by Costantino Vischetti, Enrica Marini, Cristiano Casucci and Arianna De Bernardi
Environments 2022, 9(10), 133; https://doi.org/10.3390/environments9100133 - 21 Oct 2022
Cited by 14 | Viewed by 5521
Abstract
The review deals with the environmental problem caused by low or moderate nickel concentrations in soils. The main effects of this potentially toxic element on the soil biota and the most common crop species are addressed. Moreover, the paper emphasises biological remediation methods [...] Read more.
The review deals with the environmental problem caused by low or moderate nickel concentrations in soils. The main effects of this potentially toxic element on the soil biota and the most common crop species are addressed. Moreover, the paper emphasises biological remediation methods against nickel pollution in European soils. The focus is on the well-accepted phytoremediation strategy alone or in combination with other more or less innovative bioremediation approaches such as microbial bioremediation, vermiremediation and the use of amendments and sequestrants. Results acquired in real field and laboratory experiments to fight against nickel contamination are summarised and compared. The main objective was to evidence the ability of the above natural techniques to reduce the nickel concentration in contaminated sites at a not-risky level. In conclusion, the examined works agree that the efficiency of phytoremediation could be implemented with co-remediation approaches, but further studies with clear and comparable indices are strongly recommended to meet the challenges for future application at a large scale. Full article
(This article belongs to the Special Issue Soil Remediation)
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17 pages, 1363 KiB  
Review
Microbial Involvement in the Bioremediation of Total Petroleum Hydrocarbon Polluted Soils: Challenges and Perspectives
by Ilaria Chicca, Simone Becarelli and Simona Di Gregorio
Environments 2022, 9(4), 52; https://doi.org/10.3390/environments9040052 - 15 Apr 2022
Cited by 25 | Viewed by 8508
Abstract
Nowadays, soil contamination by total petroleum hydrocarbons is still one of the most widespread forms of contamination. Intervention technologies are consolidated; however, full-scale interventions turn out to be not sustainable. Sustainability is essential not only in terms of costs, but also in terms [...] Read more.
Nowadays, soil contamination by total petroleum hydrocarbons is still one of the most widespread forms of contamination. Intervention technologies are consolidated; however, full-scale interventions turn out to be not sustainable. Sustainability is essential not only in terms of costs, but also in terms of restoration of the soil resilience. Bioremediation has the possibility to fill the gap of sustainability with proper knowledge. Bioremediation should be optimized by the exploitation of the recent “omic” approaches to the study of hydrocarburoclastic microbiomes. To reach the goal, an extensive and deep knowledge in the study of bacterial and fungal degradative pathways, their interactions within microbiomes and of microbiomes with the soil matrix has to be gained. “Omic” approaches permits to study both the culturable and the unculturable soil microbial communities active in degradation processes, offering the instruments to identify the key organisms responsible for soil contaminant depletion and restoration of soil resilience. Tools for the investigation of both microbial communities, their degradation pathways and their interaction, will be discussed, describing the dedicated genomic and metagenomic approaches, as well as the interpretative tools of the deriving data, that are exploitable for both optimizing bio-based approaches for the treatment of total petroleum hydrocarbon contaminated soils and for the correct scaling up of the technologies at the industrial scale. Full article
(This article belongs to the Special Issue Soil Remediation)
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