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Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA

Phytoremediation has been explored as a cost‐effective method to remediate soil Pb contamination. A greenhouse study was conducted to evaluate the efficacy of Vigna unguiculata, Brassica pekinensis, Gomphrena globose, and Helianthus annuus for removing and immobilizing Pb in soil collected from the...

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Autores principales: Yao, X., Saikawa, E., Warner, S., D’Souza, P. E., Ryan, P. B., Barr, D. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450253/
https://www.ncbi.nlm.nih.gov/pubmed/37637997
http://dx.doi.org/10.1029/2022GH000752
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author Yao, X.
Saikawa, E.
Warner, S.
D’Souza, P. E.
Ryan, P. B.
Barr, D. B.
author_facet Yao, X.
Saikawa, E.
Warner, S.
D’Souza, P. E.
Ryan, P. B.
Barr, D. B.
author_sort Yao, X.
collection PubMed
description Phytoremediation has been explored as a cost‐effective method to remediate soil Pb contamination. A greenhouse study was conducted to evaluate the efficacy of Vigna unguiculata, Brassica pekinensis, Gomphrena globose, and Helianthus annuus for removing and immobilizing Pb in soil collected from the Westside Lead Superfund site in Atlanta. Plants were cultivated in sampled soil with a Pb concentration of 515 ± 10 mg/kg for 60 days. Soils growing H. annuus were additionally treated with ethylenediaminetetraacetic acid (EDTA) (0.1 g/kg) or compost (20% soil blend) to assess their capabilities for enhancing phytoremediation. Mean post‐phytoremediation Pb concentrations in the four plant species were 23.5, 25.7, 50.0, and 58.1 mg/kg dry weight (DW), respectively, and were substantially higher than 1.55 mg/kg DW in respective plant species grown in control soils with no Pb contamination. The highest Pb concentration, translocation factor, and biomass were found in V. unguiculate among four species without soil amendments. H. annuus treated with EDTA and compost resulted in a significant increase in the total Pb uptake and larger biomass compared to non‐treated plants, respectively. Although this study found that V. unguiculata was the best candidate for Pb accumulation and immobilization among four species, soil remediation was limited to 54 mg/kg in a growing season. We find that it is critically important to perform phytostabilization in a secure manner, since Pb bioavailability of edible plant parts implies the potential risk associated with their unintentional consumption. Efficiently and effectively remediating Pb‐contaminated soils in a low‐cost manner needs to be further studied.
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spelling pubmed-104502532023-08-26 Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA Yao, X. Saikawa, E. Warner, S. D’Souza, P. E. Ryan, P. B. Barr, D. B. Geohealth Research Article Phytoremediation has been explored as a cost‐effective method to remediate soil Pb contamination. A greenhouse study was conducted to evaluate the efficacy of Vigna unguiculata, Brassica pekinensis, Gomphrena globose, and Helianthus annuus for removing and immobilizing Pb in soil collected from the Westside Lead Superfund site in Atlanta. Plants were cultivated in sampled soil with a Pb concentration of 515 ± 10 mg/kg for 60 days. Soils growing H. annuus were additionally treated with ethylenediaminetetraacetic acid (EDTA) (0.1 g/kg) or compost (20% soil blend) to assess their capabilities for enhancing phytoremediation. Mean post‐phytoremediation Pb concentrations in the four plant species were 23.5, 25.7, 50.0, and 58.1 mg/kg dry weight (DW), respectively, and were substantially higher than 1.55 mg/kg DW in respective plant species grown in control soils with no Pb contamination. The highest Pb concentration, translocation factor, and biomass were found in V. unguiculate among four species without soil amendments. H. annuus treated with EDTA and compost resulted in a significant increase in the total Pb uptake and larger biomass compared to non‐treated plants, respectively. Although this study found that V. unguiculata was the best candidate for Pb accumulation and immobilization among four species, soil remediation was limited to 54 mg/kg in a growing season. We find that it is critically important to perform phytostabilization in a secure manner, since Pb bioavailability of edible plant parts implies the potential risk associated with their unintentional consumption. Efficiently and effectively remediating Pb‐contaminated soils in a low‐cost manner needs to be further studied. John Wiley and Sons Inc. 2023-08-25 /pmc/articles/PMC10450253/ /pubmed/37637997 http://dx.doi.org/10.1029/2022GH000752 Text en © 2023 The Authors. GeoHealth published by Wiley Periodicals LLC on behalf of American Geophysical Union. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Research Article
Yao, X.
Saikawa, E.
Warner, S.
D’Souza, P. E.
Ryan, P. B.
Barr, D. B.
Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title_full Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title_fullStr Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title_full_unstemmed Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title_short Phytoremediation of Lead‐Contaminated Soil in the Westside of Atlanta, GA
title_sort phytoremediation of lead‐contaminated soil in the westside of atlanta, ga
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450253/
https://www.ncbi.nlm.nih.gov/pubmed/37637997
http://dx.doi.org/10.1029/2022GH000752
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