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- Title
The Mechanism of Nickel in Nickel-Pyrene-Contaminated Soil Remediated by Bidens pilosa L. with Applying Polyaspartic Acid, Aminotriacetic Acid, and Tea Saponin.
- Authors
Gao, Mingjing; He, Lihong; Mao, Ying; Chen, Zongze; Zhang, Xinying; Liu, Xiaoyan; Wang, Chuanhua
- Abstract
Three kinds of fortifiers, polyaspartic acid (PASP), aminotriacetic acid (NTA), and tea saponin (TS) were applied in strengthening the phytoremediation efficiency of nickel by Bidens pilosa L. (B. pilosa) in nickel-pyrene-contaminated soil. The growth of B. pilosa, Ni distribution in B. pilosa, chemical morphology of Ni, and soil microbial community structure were investigated by pot experiment in this study. Results showed that the removal rate of Ni increased by 10.02% in the PASP treatment and 8.81% in the PASP-TS treatment, compared with the only planting B. pilosa treatment. The Ni content in roots of these two treatment groups was increased by 86.8% and 87.9%, and Ni content in the cell wall and soluble fraction of roots were increased by 99.31% and 82.60% and 109.05% and 43.69%, respectively. More inorganic and water-soluble Ni was converted to Ni bounded to polysaccharides or proteins. In addition, the residual and organic matter-bounded state of Ni in soil greatly transformed into the iron-manganese oxide-bounded state after adding PASP. The relative abundance of bacteria related to Ni transformation increased significantly. Sphingomonas was promoted to 19.2% in PASP-TS treatment. Correlation analysis showed that plant extraction and soil microbial transformation were obviously related to Ni removal. The application of NTA and TS had little effect on the remediation efficiency of Ni. In conclusion, the use of PASP was conducive to the remediation effect of Ni in co-contaminated soil by B. pilosa.
- Subjects
NICKEL; MICROBIAL communities; TEA; PLANT-soil relationships; ACIDS; SOILS
- Publication
Water, Air & Soil Pollution, 2023, Vol 234, Issue 3, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-023-06177-z