摘要
本研究选择四川省冕宁牦牛坪稀土矿区南侧的植物和土壤为研究对象,野外采样后通过电感耦合等离子体质谱仪分析、富集系数及转运系数等方法,计算了该区域6种优势植物(附地菜、凤尾蕨、活麻、艾草、平枝栒子、井栏边草)的钍、铀富集能力,并筛选出当地钍、铀的耐受性植物。结果表明:土壤中重金属镉(Cd)、铅(Pb)、钍(Th)及铀(U)含量超出国家背景值及四川背景值,土壤存在一定的污染;6种优势植物钍的富集系数范围为0.001~0.057,转运系数范围为0.01~3.87,铀的富集系数范围为0.003~0.070,转运系数范围为0.04~1.42。凤尾蕨属的井栏边草是对钍、铀富集能力最强的植物,可考虑将井栏边草作为当地土壤修复的耐受性植物使用。
In this study,six dominant plants were analyzed and calculated by field sampling,ICP-MS analysis,enrichment coefficient,transport coefficient,root retention coefficient,etc.Suaeda salsa,Trigonotis peduncularis,Pteris cretica,Laportea cuspidate,Artemisia argyi,Cotoneaster horizontalis,Pteris multifida were used to screen enrichment plants of uranium and thorium.The results showed that the contents of heavy metals cadmium(Cd),lead(Pb),thorium(Th)and uranium(U)in the soil on the south side of the mining area exceed the national background value and the Sichuan background value,and the soil is polluted to a certain extent;the enrichment coefficient and transport coefficient of thorium nuclides were 0.001~0.057 and 0.01~3.87 respectively.The enrichment coefficient of uranium nuclides in dominant plants is 0.01~0.08,the transport coefficient is 0.03~0.33,and the root retention coefficient is 0.003-0.070 and 0.04~1.42.The plant with the strongest enrichment ability for thorium and uranium is the Pteris multifida.It can be considered as a tolerant plant for local soil remediation.
作者
鲜杨
周芙蓉
董浩
唐鹤溪
XIAN Yang;ZHOU Furong;DONG Hao;TANG Hexi(Sichuan Radiation Detection and Protection Institute of Nuclear industry(Sichuan Nuclear Emergency Technical Support Center),Chengdu 610052,China)
出处
《四川有色金属》
2023年第3期1-4,共4页
Sichuan Nonferrous Metals
关键词
稀土矿区
土壤
钍
铀
植物筛选
rare earth mining area
soil,
thorium
uranium
plant screening
