期刊论文

Phytoremediation of Uranium Contaminated Soil by Macleaya cordata and Salicaceae in Intercropping Pattern

Ding, D.

中文

原子能科学技术

1000-6931

2018

52

10

1748-1755

10.7538/yzk.2018.youxian.0116

U1401231:国家自然科学基金 2016SK2041:湖南省科技厅重点项目 2017RS3050:湖南省科技厅重点项目 2018JJ3445:湖南省自然科学基金 14B150:湖南省教育厅优秀青年项目 2015XQD35:南华大学博士启动基金

本校为第一且通讯机构

采用铀富集植物向日葵、博落回和竹柳进行单作与间作,开展铀污染土壤修复实验,研究了各植物富集铀的性能、根际土壤中微生物群落、有机酸含量以及铀的化学形态变化。结果表明,与单作相比,博落回和竹柳间作时,它们对铀的富集量分别提高了183.50%和24.93%,转运系数分别提高了120.31%和104.3%,修复效率最高。博落回和竹柳间作时,根际土壤中耐受菌Acidobacteria、促生菌Bradyrhizobium以及分泌有机酸真菌Aspergillus的比例显著升高,草酸和丙二酸的含量明显增加。Acidobacteria和Bradyrhizobium等细菌提高了植物对铀的耐受性能和富集性能,Aspergillus分泌的有机酸与铀形成螯合物,增加了土壤中可交换态...

The uranium accumulators including Helianthus annuus, Macleaya cordata and Salicaceae were planted in monoculture and intercropping patterns to remediate uranium contaminated soils. The bioaccumulation capabilities of the plants for uranium, and the microbial communities, the organic acid contents and the transformation of uranium species in their rhizosphere soils were investigated. It is found that compared with the monoculture pattern, the bioaccumulation amounts of uranium by Macleaya cordata and Salicaceae in the intercropping pattern incr...