Abstract
Phytoremediation is a promising method for the removal of toxic trace elements, specifically of copper, from the contaminated soil in the mining regions of Armenia. Thereby, the objectives of our study were the assessment of copper accumulation capacity and phytoremediation suitability of wormwood (Artemisia absinthium L.), a potential metal hyperaccumulator, as well as the identification of the influence of some chelating agents and their combinations on copper phytoremediation effectiveness. The results of studies have shown that A. absinthium is a relatively well-adapted plant species with the ability to grow in copper-contaminated soils collected from the surroundings of Zangezur Copper and Molybdenum Combine (south-east of Armenia). The observed decrease in plant growth in contaminated soil was possible to restore by the use of ammonium nitrate. It was revealed that for the remediation of copper-contaminated soils by phytostabilisation method, A. absinthium could be grown without the application of chelating agents, as being a perennial herb, it is able to accumulate relatively high contents of copper in its root and do not transfer this metal to the above-ground part at the same time. As opposed to the phytostabilisation method, for the cleaning of copper-contaminated soils through phytoextraction method by A. absinthium, the application of chemical amendments is needed for the enhancement of copper bioavailability and for its intensive transportation to the above-ground part of the plant. Collating the effects of various chemical agents on the plant, we concluded that the growth scheme, when the application of NH4NO3, a promoter of plant growth, is combined with the joint use of citric and malic acids, can be applied as the most expedient approach for remediation of copper-contaminated soils by phytoextraction method.
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This work was supported by the RA Science Committee and the Russian Foundation for Basic Research (RF) in the frames of the joint research project SCS No 20RF-036 and RFBR No 20-55-05014 accordingly.
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Karen Ghazaryan—Supervision, Conceptualization, Project administration, Data curation, Funding acquisition, Methodology, Writing—original draft. Hasmik Movsesyan—Conceptualization, Formal analysis, Funding acquisition, Resources, Investigation, Writing—review and editing. Tatiana Minkina—Conceptualization, Methodology, Formal analysis, Writing—Review and Editing. Dina Nevidomskaya—Investigation, Data curation, Funding acquisition, Methodology. Vishnu Rajput—Investigation, Data curation, Methodology, Visualization.
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Ghazaryan, K.A., Movsesyan, H.S., Minkina, T.M. et al. Phytoremediation of copper-contaminated soil by Artemisia absinthium: comparative effect of chelating agents. Environ Geochem Health 44, 1203–1215 (2022). https://doi.org/10.1007/s10653-021-01151-2
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DOI: https://doi.org/10.1007/s10653-021-01151-2