Effects of β-cyclodextrin on phytoremediation of soil co-contaminated with Cd and BDE-209 by arbuscular mycorrhizal amaranth

Xing Li; Ao Yu Chen; Le Yi Yu; Xue Xue Chen; Lei Xiang; Hai Ming Zhao; Ce Hui Mo; Yan Wen Li; Quan Ying Cai; Ming Hung Wong; Hui Li

doi:10.1016/j.chemosphere.2018.12.211

Effects of β-cyclodextrin on phytoremediation of soil co-contaminated with Cd and BDE-209 by arbuscular mycorrhizal amaranth

Chemosphere. 2019 Apr:220:910-920. doi: 10.1016/j.chemosphere.2018.12.211. Epub 2019 Jan 2.

Authors

Xing Li¹, Ao Yu Chen¹, Le Yi Yu¹, Xue Xue Chen¹, Lei Xiang¹, Hai Ming Zhao¹, Ce Hui Mo¹, Yan Wen Li¹, Quan Ying Cai¹, Ming Hung Wong², Hui Li³

Affiliations

¹ Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, PR China.
² Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, PR China; Consortium on Environment, Health, Education and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China.
³ Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, PR China. Electronic address: tlihui@jnu.edu.cn.

PMID: 33395812
DOI: 10.1016/j.chemosphere.2018.12.211

Abstract

Pot experiments were conducted to investigate the effects of a series of β-cyclodextrin (β-CD) on phytoremediation of soil co-contaminated with Cd and BDE-209 by amaranth (Amaranthus hypochondriacus L.) inoculated with arbuscular mycorrhizal fungus (AMF) - Rhizophagus intraradices. Results showed that the combination of mycorrhizal amaranth and 0.4% β-CD (RI+β_0.4) significantly enhanced Cd concentrations and contents in shoots, total PBDEs concentration in roots, and BDE-209 dissipation in soil. Moreover, the RI+β_0.4 treatment exerted the highest removal efficiency of both Cd and BDE-209. On the contrary, the xylem area, shoot Cd and BDE-209 concentrations and contents, and removal efficiency of Cd were markedly reduced in mycorrhizal amaranth with 0.8% or 1.2% β-CD treatments (RI+β_0.8, RI+β_1.2), compared with single inoculation treatment. The well-organized chloroplast and well-defined root anatomical structure were also observed in the treatment of RI+β_0.4. Positive correlation was found between shoot biomass and chlorophyll concentrations. Shoot Cd or BDE-209 concentrations were positively correlated with xylem areas. In conclusion, mycorrhizal amaranth added with 0.4% β-CD could be used for the decontamination of soil polluted with mixture of Cd and BDE-209 due to the higher chlorophyll concentration and the larger xylem area.

Keywords: Arbuscular mycorrhizal fungi; Cd-hyperaccumulator; PBDEs; Remediation; Surfactant.