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Potential of Cassia alata L. Coupled with Biochar for Heavy Metal Stabilization in Multi-Metal Mine Tailings

Author

Listed:
  • Lige Huang

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China)

  • Yuanyuan Li

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China)

  • Man Zhao

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China)

  • Yuanqing Chao

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
    Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
    Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou 510275, China)

  • Rongliang Qiu

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
    Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
    Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou 510275, China)

  • Yanhua Yang

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
    Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China)

  • Shizhong Wang

    (School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
    Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
    Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou 510275, China)

Abstract

To explore the effect of different biochars on Cassia alata L. growth and heavy metal immobilization in multi-metal mine tailings, a 100-day pot experiment was conducted. Three biochars derived from Hibiscus cannabinus core (HB), sewage sludge (SB) and chicken manure (MB), were added to mine tailings at rates of 0.4%, 1% and 3% ( w / w ). The results showed that the root biomass, shoot biomass, plant height and root length were 1.2–2.8, 1.7–3.2, 1–1.5 and 1.6–3.3 times of those in the control group, respectively. Pb, Zn, Cu, Cd and As contents in the shoot decreased by 63.9–89.5%, 46.9–66.0%, 32.7–62.4%, 40.4–76.4% and 54.9–77.5%, respectively. The biochar significantly increased the pH and decreased the mild acid-soluble Pb and Cu concentrations in the mine tailings. Specifically, SB immobilized Pb and Cu better than MB and HB did, although it did not immobilize As, Zn or Cd. Meanwhile, more attention should be paid to the potential As release as the biochar application rate increases. In conclusion, Cassia alata L. coupled with 3% of SB could be an effective measure for restoring multi-metal mine tailings. This study herein provided a promising ecological restoration technique for future practice of heavy metal stabilization in mine tailings.

Suggested Citation

  • Lige Huang & Yuanyuan Li & Man Zhao & Yuanqing Chao & Rongliang Qiu & Yanhua Yang & Shizhong Wang, 2018. "Potential of Cassia alata L. Coupled with Biochar for Heavy Metal Stabilization in Multi-Metal Mine Tailings," IJERPH, MDPI, vol. 15(3), pages 1-15, March.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:3:p:494-:d:135825
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    Citations

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    Cited by:

    1. Mo-Ming Lan & Chong Liu & Shi-Jiao Liu & Rong-Liang Qiu & Ye-Tao Tang, 2020. "Phytostabilization of Cd and Pb in Highly Polluted Farmland Soils Using Ramie and Amendments," IJERPH, MDPI, vol. 17(5), pages 1-12, March.
    2. Jorge Paz-Ferreiro & Gabriel Gascó & Ana Méndez & Suzie M. Reichman, 2018. "Soil Pollution and Remediation," IJERPH, MDPI, vol. 15(8), pages 1-3, August.

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