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Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Sedum plumbizincicola

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Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Sedum plumbizincicola. / Li, Zhu; Wu, Longhua; Hu, Pengjie; Zhang, Hao; Christie, Peter.

In: Environmental Pollution, Vol. 189, 06.2014, p. 176-183.

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Li, Zhu ; Wu, Longhua ; Hu, Pengjie ; Zhang, Hao ; Christie, Peter. / Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Sedum plumbizincicola. In: Environmental Pollution. 2014 ; Vol. 189. pp. 176-183.

Bibtex

@article{513734ca0e9542c69937070c036cacca,
title = "Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Sedum plumbizincicola",
abstract = "A cadmium/zinc hyperaccumulator extracted metals from four contaminated soils over three years in a glasshouse experiment. Changes in plant metal uptake and soil total (aqua regia-extractable) and available metals were investigated. Plant Cd concentrations in a high-Cd acid soil and plant Zn concentrations in two acid soils decreased during repeated phytoextraction and were predicted by soil available metal concentrations. However, on repeated phytoextraction, plant Cd concentrations remained constant in lightly Cd-polluted acid soils, as did plant Cd and Zn in alkaline soils, although soil available metal concentrations decreased markedly. After phytoextraction acid soils showed much higher total metal removal efficiencies, indicating possible suitability of phytoextraction for acid soils. However, DGT-testing, which takes soil metal re-supply into consideration, showed substantial removal of available metal and distinct decreases in metal supply capacity in alkaline soils after phytoextraction, suggesting that a strategy based on lowering the bioavailable contaminant might be feasible.",
keywords = "Phytoremediation, Metal bioavailability, Bioavailable contaminated stripping (BCS), Diffusive gradients in thin-films (DGT)",
author = "Zhu Li and Longhua Wu and Pengjie Hu and Hao Zhang and Peter Christie",
year = "2014",
month = jun,
doi = "10.1016/j.envpol.2014.02.034",
language = "English",
volume = "189",
pages = "176--183",
journal = "Environmental Pollution",
issn = "0269-7491",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Sedum plumbizincicola

AU - Li, Zhu

AU - Wu, Longhua

AU - Hu, Pengjie

AU - Zhang, Hao

AU - Christie, Peter

PY - 2014/6

Y1 - 2014/6

N2 - A cadmium/zinc hyperaccumulator extracted metals from four contaminated soils over three years in a glasshouse experiment. Changes in plant metal uptake and soil total (aqua regia-extractable) and available metals were investigated. Plant Cd concentrations in a high-Cd acid soil and plant Zn concentrations in two acid soils decreased during repeated phytoextraction and were predicted by soil available metal concentrations. However, on repeated phytoextraction, plant Cd concentrations remained constant in lightly Cd-polluted acid soils, as did plant Cd and Zn in alkaline soils, although soil available metal concentrations decreased markedly. After phytoextraction acid soils showed much higher total metal removal efficiencies, indicating possible suitability of phytoextraction for acid soils. However, DGT-testing, which takes soil metal re-supply into consideration, showed substantial removal of available metal and distinct decreases in metal supply capacity in alkaline soils after phytoextraction, suggesting that a strategy based on lowering the bioavailable contaminant might be feasible.

AB - A cadmium/zinc hyperaccumulator extracted metals from four contaminated soils over three years in a glasshouse experiment. Changes in plant metal uptake and soil total (aqua regia-extractable) and available metals were investigated. Plant Cd concentrations in a high-Cd acid soil and plant Zn concentrations in two acid soils decreased during repeated phytoextraction and were predicted by soil available metal concentrations. However, on repeated phytoextraction, plant Cd concentrations remained constant in lightly Cd-polluted acid soils, as did plant Cd and Zn in alkaline soils, although soil available metal concentrations decreased markedly. After phytoextraction acid soils showed much higher total metal removal efficiencies, indicating possible suitability of phytoextraction for acid soils. However, DGT-testing, which takes soil metal re-supply into consideration, showed substantial removal of available metal and distinct decreases in metal supply capacity in alkaline soils after phytoextraction, suggesting that a strategy based on lowering the bioavailable contaminant might be feasible.

KW - Phytoremediation

KW - Metal bioavailability

KW - Bioavailable contaminated stripping (BCS)

KW - Diffusive gradients in thin-films (DGT)

U2 - 10.1016/j.envpol.2014.02.034

DO - 10.1016/j.envpol.2014.02.034

M3 - Journal article

VL - 189

SP - 176

EP - 183

JO - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

ER -