CHENMeng-jie,CHEN Zhong-kai,LIYa-nan,et al.Microbial-assisted Phytoremediation for Cd and Ni in Sediments: Performance and Mechanism[J].China Water & Wastewater,2024,40(13):93-101.
Microbial-assisted Phytoremediation for Cd and Ni in Sediments: Performance and Mechanism
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第13期
Page:
93-101
Column:
Date of publication:
2024-07-01
- Keywords:
- phytoremediation; river sediment; AM fungi; indigenous dominant bacteria; heavy metal morphology; enzyme activity
- Abstract:
- To address the issue of heavy metal pollution in river sediments, pot experiments were conducted to investigate the ectopic repair performance and mechanism of microbial?assisted phytoremediation technology in mitigating heavy metal contamination in river sediments. The experiments involved intercropping and rotation of corn, ryegrass and alfalfa, and set up three treatment groups: simple plant, AM fungi combined plant, and AM fungi-indigenous dominant bacteria combined plant. The microbial combined plant intercropping-rotation method complemented each other and promoted the conversion of heavy metals Cd and Ni in sediments. In the first round of corn and ryegrass intercropping, there was a decrease in Cd content in sediments by 21.81% and 30.66%, respectively, particularly after the addition of AM fungi. AM fungi showed the ability to facilitate the conversion of Cd into a bioavailable state, as well as increase the activities of dehydrogenase and urease. Additionally, they enhanced the accumulation of Cd in plant roots. In the second round of alfalfa and ryegrass intercropping, the Ni content in ryegrass root sediments decreased by 24.45% and 31.80%, respectively, after the addition of AM fungi and AM fungi-indigenous dominant bacteria.
Last Update:
2024-07-01