Evaluation of some chelating agents on phytoremediation efficiency of Amaranthus caudatus L. and Tagetes patula L. in soils contaminated with lead



This study was designed to evaluate the possible effects of some chelating agents on phytoremediation efficiency and plant growth parameters of Amaranthus caudatus L. and Tagetes patula L. in soils contaminated with lead.


The plant species were grown in pots and treated with lead nitrate and in combination with 2.5, 2.0 and 2.5 mmol/kg of EDTA, SA and CA, respectively.


The results showed that the highest accumulations of Pb (mg/kg) with 0.74 and 0.13 were found in the roots and stems of A. caudatus exposed to 400 mg/kg Pb containing EDTA and SA, respectively. Moreover, the highest accumulation of Pb in the roots and stems of T. patula with 0.87 and 1.5 mg/kg were observed in 400 mg/kg Pb- contaminated soil containing SA.


Although the results obtained showed that T. patula would have a better phytoextraction potential than A. caudatus, it should be noted that due to the Pb behavior in the soil and/or leaching of Pb from the soil columns during the irrigation period the low amounts of Pb absorption by the root and aerial parts of the plants compared to the added doses of Pb(NO3)2 solution to the soil samples, imply the studied plants haven’t the adequate potential for phytoextraction of Pb from contaminated soils.

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The authors are grateful to the Hamedan Branch, Islamic Azad University for providing facilities to conduct and complete this study.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by [Nastaran Aghelan, Soheil Sobhan Ardakani, Mehrdad Cheraghi, Bahareh Lorestani and Hajar Merrikhpour]. The first draft of the manuscript was written by [Soheil Sobhan Ardakani] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Soheil Sobhanardakani.

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Aghelan, N., Sobhanardakani, S., Cheraghi, M. et al. Evaluation of some chelating agents on phytoremediation efficiency of Amaranthus caudatus L. and Tagetes patula L. in soils contaminated with lead. J Environ Health Sci Engineer (2021). https://doi.org/10.1007/s40201-021-00623-y

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  • Chelating agent
  • Pb-contaminated soil
  • Ornamental plants
  • Phytoremediation