Enhancement of cadmium phytoextraction from contaminated soils with Artemisia princeps var. orientalis

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Abstract

Phytoextraction using plants to remove toxic metals from the environment is an emerging technology for contaminated land remediation. The maximum efficiency of phytoextraction is controlled by the availability of metals in the soil. Plant availability of soil metals are often manipulated by additions of chelating agents. We conducted a greenhouse experiment to evaluate the effects of chelator and ligands on phytoextraction of Cd from contaminated soils with an endemic plant, Artemisia princeps var. orientalis. Cadmium content in the plant was highest in (NH4)2SO4 treatment, but sulfur powder had little effect on Cd accumulation in the plant due to low buffering capacity of the soil and slow turnover rate of So to SO4 2-. Cadmium content in the plant was slightly increased in oxalic acid and EDTA treatments by accompanying pH decrease in the soil. Phytoremediation Index (PI) increased in the order of control<sulfur powder (So)<oxalic acid<(NH4)2 SO4< EDTA treatments. In addition, Cd content in the plant showed the same trend with PI except for EDTA treatment. It could be postulated that EDTA addition should be avoided for the soil with high Cd availability as it might accelerate a continuous leaching of Cd-EDTA complexes from surface to subsoil during the phytoextraction. Overall results indicated that (NH4)2SO4 can be used to enhance Cd accumulation in the Artemisia princeps var. orientalis during phytoextraction.

Original languageEnglish
Pages (from-to)263-268
Number of pages6
JournalJournal of Applied Sciences
Volume7
Issue number2
Publication statusPublished - 2007 Jan 15

Fingerprint

cadmium
EDTA
oxalic acid
phytoremediation
soil
sulfur
contaminated land
chelating agent
metal
contaminated soil
buffering
subsoil
ligand
turnover
remediation
leaching
experiment
index
effect

Keywords

  • (NH)SO
  • Availability
  • Cd
  • EDTA
  • Phytoextraction
  • Sequential extraction

ASJC Scopus subject areas

  • General

Cite this

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title = "Enhancement of cadmium phytoextraction from contaminated soils with Artemisia princeps var. orientalis",
abstract = "Phytoextraction using plants to remove toxic metals from the environment is an emerging technology for contaminated land remediation. The maximum efficiency of phytoextraction is controlled by the availability of metals in the soil. Plant availability of soil metals are often manipulated by additions of chelating agents. We conducted a greenhouse experiment to evaluate the effects of chelator and ligands on phytoextraction of Cd from contaminated soils with an endemic plant, Artemisia princeps var. orientalis. Cadmium content in the plant was highest in (NH4)2SO4 treatment, but sulfur powder had little effect on Cd accumulation in the plant due to low buffering capacity of the soil and slow turnover rate of So to SO4 2-. Cadmium content in the plant was slightly increased in oxalic acid and EDTA treatments by accompanying pH decrease in the soil. Phytoremediation Index (PI) increased in the order of controlo)4)2 SO4< EDTA treatments. In addition, Cd content in the plant showed the same trend with PI except for EDTA treatment. It could be postulated that EDTA addition should be avoided for the soil with high Cd availability as it might accelerate a continuous leaching of Cd-EDTA complexes from surface to subsoil during the phytoextraction. Overall results indicated that (NH4)2SO4 can be used to enhance Cd accumulation in the Artemisia princeps var. orientalis during phytoextraction.",
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