Fire effects on the distribution and bioavailability of potentially toxic elements (PTEs) in agricultural soils

Terzano, Roberto; Rascio, Ida; Allegretta, Ignazio; Porfido, Carlo; Spagnuolo, Matteo; Khanghahi, Mohammad Yaghoubi; Crecchio, Carmine; Sakellariadou, Fani; Gattullo, Concetta Eliana

doi:10.1016/j.chemosphere.2021.130752

Cited by 39 publications

(19 citation statements)

References 180 publications

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“…An important factor in the increase in PTE toxicity in soils is the pH [37]. An increase in the PTE share in the biogeochemical cycle is largely related to the acid pH of the soil [38].…”

Section: Soil Ph After Biochar Applicationmentioning

confidence: 99%

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

et al. 2021

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In response to the growing threat to the quality of the soil environment, new technologies are being developed to protect and remediate contaminated sites. A new approach, namely, assisted phytostabilization, has been used in areas contaminated with high levels of potentially toxic elements (PTEs), using various soil additives. This paper determined the effectiveness of biochar-assisted phytostabilization using Dactylis glomerata L. of soil contaminated with high concentrations of the selected PTEs (in mg/kg soil): Cu (780 ± 144), Cd (25.9 ± 2.5), Pb (13,540 ± 669) and Zn (8433 ± 1376). The content of the selected PTEs in the roots and above-ground parts of the tested grass, and in the soil, was determined by atomic absorption spectrometry (AAS). The addition of biochar to the contaminated soil led to an increase in plant biomass and caused an increase in soil pH values. Concentrations of Cu, Cd, Pb and Zn were higher in the roots than in the above-ground parts of Dactylis glomerata L. The application of biochar significantly reduced the total content of PTEs in the soil after finishing the phytostabilization experiment, as well as reducing the content of bioavailable forms extracted from the soil using CaCl2 solution, which was clearly visible with respect to Cd and Pb. It is concluded that the use of biochar in supporting the processes of assisted phytostabilization of soils contaminated with PTEs is justified.

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“…An important factor in the increase in PTE toxicity in soils is the pH [37]. An increase in the PTE share in the biogeochemical cycle is largely related to the acid pH of the soil [38].…”

Section: Soil Ph After Biochar Applicationmentioning

confidence: 99%

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

et al. 2021

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“…Notwithstanding, an overall evaluation highlighted that fire differently affected soils under HO and H as compared with soils under P and BL; in fact, in burnt soils under HO and H, metal availability did not control the enzymatic activities, whereas the opposite occurred in those under P and BL. Fire occurrence induced transformations on soil metal content, exposing metals to the soil solution and enhancing their bioavailability [52]. The increased metal availability can cause the excessive accumulation of them in microorganisms, inducing oxidative stress or chelation of essential metabolites and causing enzyme inactivation and cell damage [52].…”

Section: Discussionmentioning

confidence: 99%

“…Fire occurrence induced transformations on soil metal content, exposing metals to the soil solution and enhancing their bioavailability [52]. The increased metal availability can cause the excessive accumulation of them in microorganisms, inducing oxidative stress or chelation of essential metabolites and causing enzyme inactivation and cell damage [52]. This was particularly evident in soils under pine, where the variations of several soil functions were of greater extent as compared with the other vegetation cover in Mediterranean area [14].…”

Section: Discussionmentioning

confidence: 99%

Role of Seasonality and Fire in Regulating the Enzymatic Activities in Soils Covered by Different Vegetation in a Mediterranean Area

et al. 2021

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As they quickly respond to environmental conditions, soil enzymes, involved in nutrient cycles, are considered good indicators of soil quality. The Mediterranean area is a peculiar environment for climatic conditions and for fire frequency. Therefore, the research aimed to evaluate the role of seasonality and fire on enzymatic activities (i.e., hydrolase, dehydrogenase, and β-glucosidase) in soils covered by herbs, black locust, pine, and holm oak. In addition, the main soil abiotic properties that drive the enzymatic activities were also investigated. In order to achieve the aims, surface soils were collected in unburnt and burnt areas and characterized for water and organic matter contents, pH, concentrations of C and N, and available fractions of Al, Ca, Cu, Fe, Mg, Mn, Na, and Pb. The results highlighted that the soil enzymatic activities were mainly affected by seasonality more than by fire; in unburnt soils, their main drivers were nutrient availabilities, whereas, in burnt soils they were pH, water and organic matter contents, C and N concentrations, and both nutrient and metal availabilities. Finally, holm oak, as compared with herbs, pine, and black locust, conferred higher stability to soils that were affected by seasonality and fire.

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“…The destruction of organic matter by fire can also dramatically affect the behavior of metals in the soil. Their altered mobility can lead to significant quantities of heavy metals leaching into groundwater [52], which can be a major source of environmental contamination. This should also be considered for green technologies that leave traces of metals in the soil during the remediation process.…”

Section: Effects Of Global Change On Contaminant Behaviourmentioning

confidence: 99%

Soil Remediation: Towards a Resilient and Adaptive Approach to Deal with the Ever-Changing Environmental Challenges

Grifoni¹,

Franchi

Fusini

et al. 2022

Environments

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Pollution from numerous contaminants due to many anthropogenic activities affects soils quality. Industrialized countries have many contaminated sites; their remediation is a priority in environmental legislation. The aim of this overview is to consider the evolution of soil remediation from consolidated invasive technologies to environmentally friendly green strategies. The selection of technology is no longer exclusively based on eliminating the source of pollution but aims at remediation, which includes the recovery of soil quality. “Green remediation” appears to be the key to addressing the issue of remediation of contaminated sites as it focuses on environmental quality, including the preservation of the environment. Further developments in green remediation reflect the aim of promoting clean-up strategies that also address the effects of climate change. Sustainable and resilient remediation faces the environmental challenge of achieving targets while reducing the environmental damage caused by clean-up interventions and must involve an awareness that social systems and environmental systems are closely connected.

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Fire effects on the distribution and bioavailability of potentially toxic elements (PTEs) in agricultural soils

Cited by 39 publications

References 180 publications

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

Role of Seasonality and Fire in Regulating the Enzymatic Activities in Soils Covered by Different Vegetation in a Mediterranean Area

Soil Remediation: Towards a Resilient and Adaptive Approach to Deal with the Ever-Changing Environmental Challenges

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