Assessment of bacterial communities in Cu-contaminated soil immobilized by a one-time application of micro-/nano-hydroxyapatite and phytoremediation for 3 years

The results showed that the application of MHA/NHA effectively increased soil pH and decreased soil available Cu content, and showed the highest increasing effects on the activities of urease, catalase and acid phosphatase

Wen-hui Zhang; Rui-bo Sun; Lei Xu; Jia-ni Liang; Jing Zhou

2019

Scholarcy highlights

  • The addition of micro-/nano-hydroxyapatite combined with Elsholtzia splendens was efficient in immobilization
  • The abundance and the diversity of bacterial community were increased with the MHA/NHA application
  • The relative abundance of acidophiles and the indicator of soil degradation decreased by the addition of MHA/NHA
  • The relative abundance of potential plant growth promoting bacteria was increased after the MHA/NHA application
  • Analysis of the dominate population showed that the application of MHA/NHA decreased the relative abundance of acidophiles and the indicator of soil degradation
  • These results suggested that these dominate bacterial populations with significant changes may be regarded as the biomarkers for the recovery of soil ecological environment, which provides a theoretical basis for the ecological evaluation of MHA/NHA

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