Applying β-cyclodextrin to amaranth inoculated with white-rot fungus for more efficient remediation of soil co-contaminated with Cd and BDE-209

Xing LI, Ao Yu CHEN, Yang WU, Li WU, Lei XIANG, Hai Ming ZHAO, Quan Ying CAI, Yan Wen LI, Ce Hui MO, Ming Hung WONG, Hui LI

Research output: Contribution to journalArticles

6 Citations (Scopus)

Abstract

A pot experiment was conducted to investigate the effect of a series of β-cyclodextrin (β-CD) concentrations on bioremediation of soil co-contaminated with Cd and BDE-209 using amaranth and the white-rot fungus Phanerochaete chrysosporium, with BDE-209 degrading ability. Results showed that the white-rot fungus was beneficial to the growth of amaranth, Cd uptake and BDE-209 degradation. Addition of β-CD further increased biomass of both shoots and roots, shoot Cd concentrations and contents, chlorophyll concentrations and soil manganese peroxidase (MnP) activities. Furthermore, well-organized mesophyll cells were observed in β-CD treatments, implying that the combination of white-rot fungus and β-CD can alleviate the stresses of Cd and BDE-209 to mesophyll cells. The BDE-209 degradation rate was positively correlated to β-CD concentration and MnP activity in soil. Our results also revealed that RF + β0.8 treatment possessed the greatest Cd removal efficiency due to its well-configured mesophyll cells and the highest shoot biomass, chlorophyll concentration, and shoot Cd concentration. Considering simultaneous removal of Cd and BDE-209 from soil, using 0.8% β-CD to amaranth inoculated with white-rot fungus is a promising way forward for the phytoremediation of soil co-contaminated with Cd and BDE-209. A high percentage of mono-BDE was detected in inoculated amaranth, suggesting that BDE-209 was debrominated into low brominated PBDEs by the fungus in soil, which were then absorbed and further debrominated into mono-BDE in the plant. Copyright © 2018 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)417-426
JournalScience of the Total Environment
Volume634
Early online dateApr 2018
DOIs
Publication statusPublished - 2018

Citation

Li, X., Chen, A. Y., Wu, Y., Wu, L., Xiang, L., Zhao, H. M., . . . Li, H. (2018). Applying β-cyclodextrin to amaranth inoculated with white-rot fungus for more efficient remediation of soil co-contaminated with Cd and BDE-209. Science of The Total Environment, 634, 417-426. doi: 10.1016/j.scitotenv.2018.03.310

Keywords

  • Cd-hyperaccumulator
  • Surfactant
  • Phytoremediation
  • PBDEs
  • Manganese peroxide

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