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Phytoremediation of Cadmium-Contaminated Soils Using the Cadmium and Zinc Hyperaccumulator Sedum plumbizincicola

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Twenty Years of Research and Development on Soil Pollution and Remediation in China

Abstract

Sedum plumbizincicola X. H. Guo et S. B. Zhou ex L. H. Wu (Crassulaceae), a new Sedum species, was firstly found in 2005 when our research team undertook extensive field investigations for searching metal hyperaccumulator species in Zhejiang Province. It was identified as new cadmium (Cd)/zinc (Zn) hyperaccumulator in 2007. During the past decade, great efforts have been taken to understand its metal-hyperaccumulating capacities, physiological metal hypertolerance and hyperaccumulation, enhancement of phytoextraction, and field application practice of phytoremediation. This paper provides a brief review on the progress on phytoremediation of Cd-contaminated soils using this species. Agronomic measures to enhance Cd and Zn phytoextraction efficiency by S. plumbizincicola were studied, including cultivation management, intercropping with other plant species, nutrient management, microbial assistant, and so on. Repeated phytoextraction of Cd- and Zn-contaminated soils using S. plumbizincicola was conducted in pot experiments to determine plant metal uptake, the changes of soil metal concentration and speciation, and soil microbial properties. So far, several research and demonstration bases have been established in numerous Chinese provinces including Zhejiang, Hunan, Henan, Jiangxi, Jiangsu, Guangdong, and Guizhou. Field assessment results confirmed that phytoextraction using S. plumbizincicola is a promising technique for the remediation of slightly Cd-polluted soils without halting normal agricultural production. Safe disposal or treatment of S. plumbizincicola biomass is also an important part for practical use of phytoextraction. Incineration and pyrolysis were employed to treat S. plumbizincicola biomass.

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Authors and Affiliations

  1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing, China

    Longhua Wu, Pengjie Hu, Zhu Li, Tong Zhou & Daoxu Zhong

  2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China

    Yongming Luo

  3. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China

    Yongming Luo

Authors
  1. Longhua Wu
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  2. Pengjie Hu
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  3. Zhu Li
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  4. Tong Zhou
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  5. Daoxu Zhong
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  6. Yongming Luo
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Corresponding author

Correspondence to Longhua Wu .

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Editors and Affiliations

  1. Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China

    Yongming Luo

  2. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China

    Chen Tu

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Wu, L., Hu, P., Li, Z., Zhou, T., Zhong, D., Luo, Y. (2018). Phytoremediation of Cadmium-Contaminated Soils Using the Cadmium and Zinc Hyperaccumulator Sedum plumbizincicola . In: Luo, Y., Tu, C. (eds) Twenty Years of Research and Development on Soil Pollution and Remediation in China. Springer, Singapore. https://doi.org/10.1007/978-981-10-6029-8_17

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