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The effectiveness and risk comparison of EDTA with EGTA in enhancing Cd phytoextraction by Mirabilis jalapa L.

Environmental Monitoring and Assessment volume 186, pages 751–759 (2014)Cite this article

Abstract

In the previous study, Mirabilis jalapa L. had revealed the basic Cd hyperaccumulator characteristics, but the accumulation ability was not as strong as that of other known Cd hyperaccumulators. In order to improve the accumulation ability of this ornamental plant, the chelants were used to activate the Cd in soil. As a substitute, ethylene glycol bis(2-aminoethyl) tetraacetic acid (EGTA) was selected to testify whether it has better effectiveness and can bring lesser metal leaching risk than EDTA. The data showed that the growth of M. jalapa was inhibited, while the Cd concentration of the plant was significantly increased under the treatments containing EDTA or EGTA. The Cd translocation ability under the EGTA treatments was higher than that under the EDTA treatments. The available Cd resulted from the application of chelant EGTA to the contaminated soils can be limited to the top 5 cm, while the application of chelant EDTA to the contaminated soils can be limited to the top 10 cm. In a word, EGTA showed better effectiveness than EDTA in enhancing Cd phytoextraction of M. jalapa. As an ornamental plant, M. jalapa has the potential to be used for phytoextraction of Cd-contaminated soils and it can beautify the environment at the same time.

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Acknowledgements

The work was supported by the Specialized Research Fund for the Doctoral Program of Higher Education (grant no. 20100031120030) and the National Natural Foundation of Science (grant no. 31200395, 41140008).

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  1. Tianjin Academy of Environmental Sciences, Tianjin, 300191, People’s Republic of China

    Song Wang

  2. Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 30071, People’s Republic of China

    Jianv Liu

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  1. Song Wang
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Correspondence to Jianv Liu.

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Wang, S., Liu, J. The effectiveness and risk comparison of EDTA with EGTA in enhancing Cd phytoextraction by Mirabilis jalapa L.. Environ Monit Assess 186, 751–759 (2014). https://doi.org/10.1007/s10661-013-3414-x

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  • DOI: https://doi.org/10.1007/s10661-013-3414-x

Keywords

  • Cd
  • Mirabilis jalapa L
  • Phytoremediation
  • EDTA
  • EGTA