School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, PR China.
Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang, PR China.
Int J Phytoremediation. 2020;22(2):140-147. doi: 10.1080/15226514.2019.1652560. Epub 2019 Aug 20.
The mosses have been widely used as bioindicators to investigate pollution and changes of heavy metals in different countries and regions. In this research, the field surveys were carried out for understanding the moss community and enrichment effects of the dominant species of mosses around the uranium mill tailings impoundment in South China, especially for the enriched contentions of Pb and Po in soil and . The results showed that the maximum concentrations of U and Ra in the study sites were 93 mg kg and 1130.8 Bq kg, respectively. The exhalation rate of Rn (), soil U, and Ra contents in SS, SS, and SS were higher than CKS. With the increase of the distance from the central well, the contents of nuclides (U and Ra) in soils and were both decreased. And, the bioconcentration factors of for Pb and Po ranged from 1.05 to 1.49, and 1.25 to 1.40, respectively, indicating an accumulation of Po and Pb from soil by . These results indicated that is hopeful to become an accumulator plant for remediation of radon pollution, and also can be used as a potential indicator plant for radon pollution monitoring.
苔藓已被广泛用作生物指标，以研究不同国家和地区的污染和重金属变化。本研究通过野外调查，了解了华南铀尾矿库周边苔藓群落和优势种的富集效应，特别是土壤中 Pb 和 Po 的富集情况。结果表明，研究点的 U 和 Ra 最大浓度分别为 93mg/kg 和 1130.8Bq/kg。SS、SS 和 SS 中Rn（）的逸出率、土壤 U 和 Ra 含量均高于 CKS。随着离中心井距离的增加，土壤和 中的核素（U 和 Ra）含量均降低。并且， 对 Pb 和 Po 的生物浓缩因子分别为 1.05-1.49 和 1.25-1.40，表明 从土壤中积累了 Po 和 Pb。这些结果表明， 有望成为修复氡污染的积累植物，也可作为氡污染监测的潜在指示植物。
