Journal of East China Normal University(Natural Science) ›› 2022, Vol. 2022 ›› Issue (6): 150-156.doi: 10.3969/j.issn.1000-5641.2022.06.015

• Ecological and Environmental Sciences • Previous Articles     Next Articles

Study on local phytoremediation of arsenic pollution in soil from sludge reforestation

Yue REN1, Weisong ZHOU2, Guofu HE1,*(), Chunyi YANG1, Gensen YANG1, Jiayan GU1, Yuanshu HU1   

  1. 1. School of Environmental and Ecological Sciences, East China Normal University, Shanghai 200241, China
    2. Shanghai Chongming District Water Bureau, Shanghai 202150, China
  • Received:2021-05-28 Accepted:2022-03-03 Online:2022-11-25 Published:2022-11-22
  • Contact: Guofu HE E-mail:gfhe@des.ecnu.edu.cn

Abstract:

Exploring the remediation effect of native plants on soil contaminated with heavy metals has significant value for real-world applications. In this study, two native plants—reed and metasequoia—were selected for remediation of heavy metal arsenic in the soil of a woodland in Shanghai, and changes in soil indexes before and after phytoremediation were monitored. The results showed that: ① The arsenic content in rhizosphere soil of Ph. australis and Metasequoia was 52.4% and 28.6% lower, respectively, than the arsenic content in non-rhizosphere soil. The arsenic content in non-rhizosphere soil, moreover, was lower than the screening value for soil environmental risk. ② After comparing the microecological characteristics of rhizosphere between reed and metasequoia, it was found that metasequoia had a better nutrient enrichment effect than reed, demonstrating that metasequoia would have a better restoration effect in terms of soil fertility.

Key words: heavy metal, pollution degree, phytoremediation, remediation effect

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