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Insights into Heavy Metals Leakage in Chelator-Induced Phytoextraction of Pb- and Tl-Contaminated Soil

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  • Xuexia Huang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Linköping University—Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China
    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Dinggui Luo

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Linköping University—Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China
    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Xiangxin Chen

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Lezhang Wei

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Linköping University—Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China)

  • Yu Liu

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Linköping University—Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China)

  • Qihang Wu

    (Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Tangfu Xiao

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Xiaotao Mai

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Guowei Liu

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Lirong Liu

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract

Chelators including DTPA (diethylene triamine pentaacetic acid) and oxalic acid were selected for inducing phytoextraction of heavy metals (HMs) from Pb-, Tl-, and Pb-Tl- contaminated soil, in which heavy metals leakage was highly remarkable. Results showed that compared with the control group without chelating agent under planting conditions, the extraction efficiency (i.e., uptake coefficient) of Pb, Tl increased by 86%, 43% from Pb-Tl- contaminated soil in the presence of oxalic acid, and there was no significant change in heavy metal leakage under rainfall conditions. It was the best phytoremediation scheme in this work. Under rainfall conditions, the HMs concentration in the leachate showed a linear decreasing trend. Acid rain promoted the leakage of heavy metals, and the average leached amount of Tl increased by 1.47 times under acid rain conditions. However, for Pb, DTPA was the main influencing factor, followed by acid rain.

Suggested Citation

  • Xuexia Huang & Dinggui Luo & Xiangxin Chen & Lezhang Wei & Yu Liu & Qihang Wu & Tangfu Xiao & Xiaotao Mai & Guowei Liu & Lirong Liu, 2019. "Insights into Heavy Metals Leakage in Chelator-Induced Phytoextraction of Pb- and Tl-Contaminated Soil," IJERPH, MDPI, vol. 16(8), pages 1-14, April.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:8:p:1328-:d:222456
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    References listed on IDEAS

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    Cited by:

    1. Lirong Liu & Dinggui Luo & Guangchao Yao & Xuexia Huang & Lezhang Wei & Yu Liu & Qihang Wu & Xiaotao Mai & Guowei Liu & Tangfu Xiao, 2020. "Comparative Activation Process of Pb, Cd and Tl Using Chelating Agents from Contaminated Red Soils," IJERPH, MDPI, vol. 17(2), pages 1-15, January.
    2. Agnieszka Pusz & Magdalena Wiśniewska & Dominik Rogalski, 2021. "Assessment of the Accumulation Ability of Festuca rubra L. and Alyssum saxatile L. Tested on Soils Contaminated with Zn, Cd, Ni, Pb, Cr, and Cu," Resources, MDPI, vol. 10(5), pages 1-18, May.

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