Phytoextraction of Cd and Zn with Noccaea caerulescens for urban soil remediation: influence of nitrogen fertilization and planting density

Jacobs, Arnaud; Brabandere, Léna De; Drouet, Thomas; Sterckeman, Thibault; Noret, Nausicaa

doi:10.1016/j.ecoleng.2018.03.007

Cited by 44 publications

(13 citation statements)

References 52 publications

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“…This shows that the high plant density chosen in this study was indeed limiting the individual growth of N. caerulescens. Jacobs et al (2018) recently reported a similar growth limitation of N. caerulescens by high plant density (100 plant m -2 compared to 50 plant m-2 ), but also showed that the higher density led to a better removal of Cd and Zn from the soil because of the higher biomass production.…”

Section: Efficiency Of Phytoextraction Over Timementioning

confidence: 68%

“…In particular, hyperaccumulators correspond to plants which are able to reach very high shoot metal concentrations, typically 100 mg kg -1 for Cd, 1000 mg kg -1 for Ni or Pb and 10,000 mg kg -1 for Zn (Baker and Brooks, 1989), although alternative thresholds can be defined (van der Ent et al, 2013). The use of hyperaccumulators has been tested in field conditions with various success rates (Hammer and Keller, 2003;Jacobs et al, 2018;McGrath et al, 2006). One of the main limitations of phytoextraction is the time needed for reaching acceptable soil metal concentrations, which can range from 4 to more than 100 years (Hammer and Keller, 2003;Mahar et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…One of the main limitations of phytoextraction is the time needed for reaching acceptable soil metal concentrations, which can range from 4 to more than 100 years (Hammer and Keller, 2003;Mahar et al, 2016). For this reason, some have suggested that phytoextraction of metals with hyperaccumulators may be more suited to a strategy of bioavailable contaminant stripping, aiming to significantly decrease the size of plant-available pool of metals (Jacobs et al, 2018). Whether phytoextraction can be sustained over repeated harvests is also uncertain, as metal phytoavailability may decrease over time and thus continuously reduce the amount of metal removed from the soil.…”

Section: Introductionmentioning

confidence: 99%

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Biochar-assisted phytoextraction of Cd and Zn by Noccaea caerulescens on a contaminated soil: A four-year lysimeter study

Rees¹,

Sterckeman²,

Morel³

2020

Science of The Total Environment

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Amendments of biochar, the residual solid of biomass pyrolysis, have been shown to enhance metal phytoextraction from contaminated soils with hyperaccumulating plants in specific situations. In order to investigate this phenomenon over successive harvests in field conditions, two identical undisturbed soil cylinders (1-m 2 section x 1.85-m height) were excavated from a contaminated agricultural plot and monitored with instrumented lysimeters. Wood-derived biochar was added at a rate of 5% (w/w) in the first 30 cm of one of the two lysimeters. The Cd/Znhyperaccumulator Noccaea caerulescens was then grown for the next four years on both lysimeters. Our results showed that the hyperaccumulating plant was able to remove about 2 g m-2 of Cd and 12-16 g m-2 of Zn within four years, representing about 40% and 4% of the initial Cd and Zn soil contamination, respectively. Biochar amendment improved plant germination and survival and increased root surface density. However, no significant effect of biochar on shoot metal content of N. caerulescens was observed. Mass balances suggested that up to 10% the metal contamination moved from the disturbed Ap horizon to the deeper horizons, particularly in the biochar-amended soil profile. Furthermore, shoot Cd and Zn concentration generally decreased over the successive harvests, together with soil metal availability. Depending on the way to account for this progressive decrease in efficiency, our estimations of the time necessary to remove the excess of metals in the topsoil in these conditions ranged from 11 to 111 years for Cd and from 97 years to an infinite time for Zn. In conclusion, the simultaneous use of N. caerulescens and biochar amendment can lead to a significant removal of specific metallic elements from the topsoil, but the risk of metal movement down the soil profile and the observed decrease in phytoextraction efficiency over time deserve further investigations.

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Section: Efficiency Of Phytoextraction Over Timementioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biochar-assisted phytoextraction of Cd and Zn by Noccaea caerulescens on a contaminated soil: A four-year lysimeter study

Rees¹,

Sterckeman²,

Morel³

2020

Science of The Total Environment

Self Cite

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“…In contrast, biological technologies, including microbial remediation, phytoremediation, and integrated approaches, are more environmentally friendly and cost-effective processes [110][111][112][113] that exploit plants and microorganisms to remove or extract elemental pollutants in various environments including soils, sediments, wastewater, and sludge, etc. [114][115][116][117].…”

Section: Soil Remediation and Phytoextraction Of Hmsmentioning

confidence: 99%

Biofuel Production Using Thermochemical Conversion of Heavy Metal-Contaminated Biomass (HMCB) Harvested from Phytoextraction Process

Dastyar

Raheem

et al. 2019

Chemical Engineering Journal

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Over the past few decades, bioenergy production from heavy metalcontaminated biomass (HMCB) has been drawing increasing attention from scientists in diverse disciplines and countries owing to their potential roles in addressing both energy crisis and environmental challenges. In this review, bioenergy recovery from HMCBs, i.e. contaminated plants and energy crops, using thermochemical processes (pyrolysis, gasification, combustion, and liquefaction) has been scrutinized. Furthermore, the necessity of the implementation of practical strategies towards sustainable phytoextraction and metalfree biofuels production has been critically discussed. To meet this aim, the paper firstly delivers the fundamental concepts regarding phytoremediation approach, and then, reviews

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“…Moreover, in urban and suburban sites, soils can undergo a lower pressure for use: in fact, areas allocated to public green would have no alternative uses and could be considered stable in the short and medium term. These two aspects, which are relatively unique to urban and suburban areas, make phytoremediation a particularly attractive technique [11].…”

Section: Introductionmentioning

confidence: 99%

The Suitability of Short Rotation Coppice Crops for Phytoremediation of Urban Soils

et al. 2019

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This experiment was aimed at verifying the usefulness of phytoremediation using Short Rotation Coppice (SRC) in an urban Zn-contaminated site. Besides elemental uptake and reclamation, the SRC method was applied to evaluate the additional benefits of a green infrastructure. Nine different plants with rapid growth and large biomass production were selected: three Populus clones, three Salix hybrids, and three Robinia genotypes. Annual and biennial coppicing were evaluated. Poplar clones were more productive using annual coppicing, while Salix and Robinia produced higher biomass in blocks not coppiced. Poplar had the highest phytoextraction rate during the second year, with 1077 g/ha. Salix clones S1 and S3 extracted similar quantities using biennial coppicing. After two years, the bioavailable fraction of Zn decreased significantly using all species, from the 26% decrease of Robinia to the 36% decrease of Salix. The short rotation coppice method proved to be useful in an urban context, for both landscape and limiting the access to the contaminated area. Improving the biomass yield through the phytomanagement options (fertilization, irrigation, coppicing, etc.) could make SRC phytoremediation an economic and effective solution to manage urban contaminated areas, coupling the added values of biomass production to the landscape benefits.

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Phytoextraction of Cd and Zn with Noccaea caerulescens for urban soil remediation: influence of nitrogen fertilization and planting density

Cited by 44 publications

References 52 publications

Biochar-assisted phytoextraction of Cd and Zn by Noccaea caerulescens on a contaminated soil: A four-year lysimeter study

Biochar-assisted phytoextraction of Cd and Zn by Noccaea caerulescens on a contaminated soil: A four-year lysimeter study

Biofuel Production Using Thermochemical Conversion of Heavy Metal-Contaminated Biomass (HMCB) Harvested from Phytoextraction Process

The Suitability of Short Rotation Coppice Crops for Phytoremediation of Urban Soils

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