Guidelines for a phytomanagement plan by the phytostabilization of mining wastes

Zine, Hamza; Midhat, Laila; Hakkou, Rachid; Adnani, Mariam El; Ouhammou, Ahmed

doi:10.1016/j.sciaf.2020.e00654

Cited by 30 publications

(22 citation statements)

References 133 publications

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“…This relationship correlates with the results reported by Wyszkowski and Radziemska [30], and Shah and Daverey [31], who found that a lower level of biomass was observed at high PTE concentrations in the soil. It is worth emphasizing that the degree of tolerance of plants to excessive levels of PTEs in the soil depends primarily on the plant species, the soil pH value and its granulometric composition and the organic matter content [32,33]. The use of soil amendments such as biochar has a beneficial effect on the use of the ingredients contained in them, which can lead to an increase in plant biomass [34].…”

Section: Dactylis Glomerata L Biomass 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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Section: Dactylis Glomerata L Biomass After Biochar Applicationmentioning

confidence: 99%

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

et al. 2021

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“…For this, excluder plant species can be used, which have low TE transfer to the aboveground shoot biomass [15]. Contrary to conventional remediation techniques, phytotechnologies need to be adapted specifically to the site where they are used, as pedoagronomics parameters and climate conditions can impact TE soil mobility and the species that can be grown [16]. Field experiments need to be performed to confirm the feasibility of the phytotechnology.…”

Section: Introductionmentioning

confidence: 99%

The Use of Sorghum in a Phytoattenuation Strategy: A Field Experiment on a TE-Contaminated Site

et al. 2021

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Phytoattenuation combines phytoextraction or phytostabilization with the economic valorization of the biomass produced on the contaminated soil. Sorghum bicolor is a suitable crop for this strategy, as it is known to be metal-tolerant and can be used for biogas or bioethanol production or in strategies toward biofortification. In the current investigation, two cultivars, Biomass 133 and Trudan Headless (HL), were studied in a metal-contaminated (Cd, Pb, Zn) field site located in northern France to assess their potential use in a phytoattenuation strategy. The biomass yield and the metal transfer in the produced biomass were monitored in three plots with different pollution levels. Both cultivars were tolerant to high levels of metal pollution in field conditions, with yields similar to that obtained on uncontaminated sites. Neither of the cultivars changed the metal mobility of the soil and both exhibited a metal-excluder behavior. Nevertheless, Cd concentration in the aboveground part of Trudan HL, and of Biomass 133 to a lesser extent, could restrict their use in some valorization options. However, biogas production was possible with the produced biomass, indicating anaerobic digestion to be a possible valorization route for sorghum grown on contaminated sites.

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“…Plant species growing on metal-polluted soils have, in principle, a higher potential to be used in the phytoremediation programs of metal-contaminated environments since they are often genetically better equipped to survive and reproduce under metal-polluted environments [8]. Furthermore, these species are suitable models to study the mechanisms underlying the tolerance to metals [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, these species are suitable models to study the mechanisms underlying the tolerance to metals [9,10]. The Syrian beancaper (Zygophyllum fabago L.) is a perennial shrub able to grow in nutrient-poor soils, as well as in areas severely contaminated with heavy metals [8,11,12]. Previous studies showed that Z. fabago populations, both adapted and non-adapted to metals, responded differently to high doses of Pb (the detected toxicity was 25 µM), with the adapted plants altering their antioxidative metabolisms more promptly and efficiently [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Genotoxicity and Cytotoxicity Induced in Zygophyllum fabago by Low Pb Doses Depends on the Population’s Redox Plasticity

et al. 2021

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Lead (Pb) soil contamination remains a major ecological challenge. Zygophyllum fabago is a candidate for the Pb phytostabilisation of mining tailings; nevertheless, the cytogenotoxic effects of low doses of Pb on this species are still unknown. Therefore, Z. fabago seeds collected from non-mining (NM) and mining (M) areas were exposed to 0, 5 and 20 µM Pb for four weeks, after which seedling growth, Pb cytogenotoxic effects and redox status were analyzed. The data revealed that Pb did not affect seedling growth in M populations, in contrast to the NM population. Cell cycle progression delay/arrest was detected in both NM and M seedlings, mostly in the roots. DNA damage (DNAd) was induced by Pb, particularly in NM seedlings. In contrast, M populations, which showed a higher Pb content, exhibited lower levels of DNAd and protein oxidation, together with higher levels of antioxidants. Upon Pb exposure, reduced glutathione (GSH) and non-protein thiols were upregulated in shoots and were unaffected/decreased in roots from the NM population, whereas M populations maintained higher levels of flavanols and hydroxycinnamic acids in shoots and triggered GSH in roots and shoots. These differential organ-specific mechanisms seem to be a competitive strategy that allows M populations to overcome Pb toxicity, contrarily to NM, thus stressing the importance of seed provenance in phytostabilisation programs.

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Guidelines for a phytomanagement plan by the phytostabilization of mining wastes

Cited by 30 publications

References 133 publications

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

The Use of Sorghum in a Phytoattenuation Strategy: A Field Experiment on a TE-Contaminated Site

Genotoxicity and Cytotoxicity Induced in Zygophyllum fabago by Low Pb Doses Depends on the Population’s Redox Plasticity

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