Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Lebrun, Manhattan; Macri, Carmelo; Miard, Florie; Hattab-Hambli, Nour; Motelica-Heino, Mikaël; Morabito, Domenico; Bourgerie, Sylvain

doi:10.1016/j.gexplo.2016.11.016

Cited by 97 publications

(52 citation statements)

References 44 publications

(43 reference statements)

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“…Application of biochar can also increase pH and enhance the physical properties of soil by raising its porosity and thereby its water holding capacity (Carlson et al 2015). Studies suggest that biochar has the potential to affect the behaviour of metals in the soil by altering their availability, solubility, transport and spatial distribution (Barrow 2012;Lebrun et al 2017), thereby immobilizing heavy metals and reducing uptake by plants (Fellet et al 2011;Karami et al 2011;Park et al 2011;Lomaglio et al 2017). The overall objective of the physical method is to reduce erosion and soil compaction while improving soil quality, thereby creating conditions suitable for re-vegetation of mine wastelands or their conversion into other productive land uses.…”

Section: Physical Methodsmentioning

confidence: 99%

Progresses in restoration of post-mining landscape in Africa

et al. 2018

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Mining alters the natural landscape and discharges large volumes of wastes that pose serious pollution hazards to the environment, to human health and to agriculture. As a result, the recent 2 decades have witnessed a global surge in research on post-mining landscape restoration, yielding a suite of techniques including physical, chemical, biological (also known as phytoremediation) and combinations. Despite the long history of mining in Africa, no systematic review has summarized advances in restoration research and practices after mining disturbance. Thus, the aim of this review was to document the state-of-knowledge and identify gaps in restoration of postmining landscape in Africa through literature review. We found that: (1) there has been substantial progress in identifying species suitable for phytoremediation; (2) few studies evaluated the feasibility of organic amendments to promote autochthonous colonization of mine wastelands or growth of planted species; and (3) restoration of limestone quarries in Kenya, sand mining tailings in South Africa, and gold mine wasteland in Ghana are successful cases of large-scale post-mining restoration practices in Africa. However, the pace of post-mining landscape restoration research and practice in Africa is sluggish compared to other parts of the global south. We recommend: (1) mainstreaming the restoration of mine wastelands in national research strategies and increased development planning to make the mining sector ''Green''; (2) inventory of the number, area, and current status of abandoned mine lands; (3) expanding the pool of candidate species for phytostabilization; (4) further evaluating the phytostabilization potential of organic amendments, e.g., biochar; (5) assessing the impacts of mining on regional biodiversity.

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Section: Physical Methodsmentioning

confidence: 99%

Progresses in restoration of post-mining landscape in Africa

et al. 2018

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“…According to earlier findings, biochar could improve the HM uptake by plants through growth increment [3,[20][21] or absorption of HM and reducing their bioavailability [22]. Regarding biochar-assisted phytoremediation with willow, Lebrun et al [23] showed that adding pinewood biochar to Pb-and As-contaminated soil increased the growth and biomass production of willow and the metal content in willow trees. In addition, a positive effect of biochar was noticed on soil quality [23].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding biochar-assisted phytoremediation with willow, Lebrun et al [23] showed that adding pinewood biochar to Pb-and As-contaminated soil increased the growth and biomass production of willow and the metal content in willow trees. In addition, a positive effect of biochar was noticed on soil quality [23]. In contrast, Lebrun et al [6] found no positive effect after the addition of pinewood biochar on willow growth parameters and on the physicochemical properties in a multi-contaminated soil.…”

Section: Introductionmentioning

confidence: 99%

Biochar improves the morphological, physiological and biochemical properties of white willow seedlings in heavy metal-contaminated soil

Mokaram-Kashtiban

Hosseini

Kouchaksaraei

et al. 2019

Arch biol sci (Beogr)

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Biochar is an efficient soil amendment used for promoting plant resistance to heavy metal (HM)-contaminated soils. There is a need for further investigation of its impacts on plants and soil. This study was undertaken as a pot experiment to assess the effect of biochar (0, 2.5, and 5% mass fractions) on the morphological, physiological and biochemical responses of white willow seedlings (Salix alba L.) cultured in uncontaminated soil and mixed soil contaminated with HM (Cu, Pb, and Cd). Additionally, some chemical properties and HM bioavailability were evaluated. Biochar increased height and diameter, root elongation, leaf area and dry biomass of the seedlings in both soils. Its addition to the contaminated soil reduced electrolyte leakage, the malondialdehyde and proline contents but increased the chlorophyll content, net photosynthesis rate, intercellular CO 2 concentration and transpiration rate in the leaf. Use of biochar (especially at 5% rate) in both soils, increased soil pH, total nitrogen, soil organic carbon and available P and K, while in the contaminated soil the availability of Cu, Pb, and Cd decreased. The results showed that biochar is a suitable amendment to contaminated soils that improves plant properties by improving soil chemical features and immobilizing HMs.Abbreviations: Brunauer-Emmett-Teller (BET); Barrett-Joyner-Halenda (BJH); intercellular CO 2 concentration (Ci); transpiration rate (E); electrolyte leakage (El); stomatal conductance (Gs); leaf area (LA); heavy metal (HM); malondialdehyde (MDA); total nitrogen (TN); scanning electron microscopy (SEM); specific leaf area (SLA); soil organic carbon (SOC); water use efficiency (WUE) Arch Biol Sci. 2019;71(2):281-291 https://doi.

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“…The phyto‐availability of metals in soils depends on the metal(loid) species and their distribution between the solid phase and the pore water due to the soil physico‐chemical characteristics. Thus, many studies have been carried out on polluted soil to evaluate metal(loid) phyto‐availability . Moreover, a wide range of individual and sequential extraction schemes have been designed to evaluate the different forms of metal binding in soils using neutral salts (CaCl 2 and NH 4 NO 3 )…”

Section: Introductionmentioning

confidence: 99%

Effect of Biochar and Amendments on Pb and As Phytotoxicity and Phytoavailability in a Technosol

Nandillon

Miard

Lebrun

et al. 2019

CLEAN Soil Air Water

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Phytostabilization has been proposed as a promising tool for long-term management of polluted sites. Optimization of the process efficiency involves choosing suitable amendments to allow both efficient plant growth and the immobilization of contaminants. The objectives of this study are to evaluate the effect of amendments on (i) the physicochemical properties of technosol and (ii) the mobility and phyto-availability of metal(loid)s. A dwarf bean growth test is conducted on technosols amended with compost, garden soil, slag, and biochar. The physicochemical properties of soil pore water (SPW) are determined as well as the phyto-available concentrations of metal(loid)s by simple extraction tests. All amendments used are able to increase SPW pH and electrical conductivity, allowing a decrease in the lead concentration in SPW by 90% and the lead phytoavailable part by 93%. However, for all amendments, SPW As concentration increased. Lastly, the amendments improve bean growth and tend to decrease the metal(oid) concentrations in aerial organs. As concentration in roots did not decrease whereas Pb concentration decreased. Metal(loid) concentrations of Pb accumulated in the aerial parts of beans and their extractable concentrations show a significant positive correlation with the extraction procedures. In contrast, the phytoavailable As shows a weak correlation with As concentrations in the aerial parts. The 1-M NH 4 NO 3 extraction procedure is the most appropriate and provides the most useful indications of the phytoavailability for the studied elements.

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Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Cited by 97 publications

References 44 publications

Progresses in restoration of post-mining landscape in Africa

Progresses in restoration of post-mining landscape in Africa

Biochar improves the morphological, physiological and biochemical properties of white willow seedlings in heavy metal-contaminated soil

Effect of Biochar and Amendments on Pb and As Phytotoxicity and Phytoavailability in a Technosol

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