|
|||||
|
|
| 有机配体对稀土元素在小麦体内积累和分异的影响 | |
| 引用本文： | 丁士明,梁涛,闫军才,张自立,孙琴.有机配体对稀土元素在小麦体内积累和分异的影响[J].生态学报,2005,25(11):2888-2894. |
| 作者姓名： | 丁士明 梁涛 闫军才 张自立 孙琴 |
| 作者单位： | 1. 中国科学院南京地理与湖泊研究所,南京,2100082;中国科学院地理科学与资源研究所,北京,100101 2. 中国科学院地理科学与资源研究所,北京,100101 3. 安徽农业大学资环学院,合肥,230036 4. 河海大学环境学院,南京,210098 |
| 基金项目： | 国家自然科学基金资助项目(40232022,40571146)~~ |
| 摘 要： | 采用营养液培养和添加外源混合稀土等方法,研究了有机配体柠檬酸、EDTA和DTPA对稀土元素在小麦的根和叶中积累与分异的影响。结果表明,低浓度有机配体对小麦根和叶中的稀土元素,尤其是轻稀土元素的积累有轻微的促进作用,随浓度的升高则表现出显著的降低作用。有机配体对重稀土的作用比轻稀土强,使根和叶中稀土元素的分布曲线向重稀土相对亏缺的方向发展。3种配体对轻、重稀土分异的作用强度为:EDTA>DTPA>柠檬酸。通过VM INTEQ计算表明,在EDTA和DTPA作用下小麦叶中稀土元素的积累与轻、重稀土的分异主要由溶液中呈自由离子态稀土元素的含量和组成控制;柠檬酸作用下小麦叶中稀土元素的变化与自由离子态稀土的含量和组成关系较弱,推测REE-柠檬酸络合物可被小麦直接吸收并运转到小麦的叶中。 |
| 关 键 词： | 稀土元素 分异 有机配体 形态 生物积累 |
| 文章编号： | 1000-0933（2005）11-2888-07 |
| 收稿时间： | 10 21 2004 12:00AM |
| 修稿时间： | 2004-10-212005-03-21 |
Effects of organic ligands on accumulation and fractionation of rare earth elements REEs in wheat |
|
| DING Shiming,LIANG Tao,YAN Juncai,ZHANG Zili and SUN Qin.Effects of organic ligands on accumulation and fractionation of rare earth elements REEs in wheat[J].Acta Ecologica Sinica,2005,25(11):2888-2894. | |
| Authors: | DING Shiming LIANG Tao YAN Juncai ZHANG Zili and SUN Qin |
| Institution: | 1. Nanjing Institute of Geography Limnology, Chinese Academy of Sciences, Nanjing 210008, China; 2. Institute of Geographical Science and Nat.ural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3. College of Resource and Environmental Sciences, Anhui Agricultural University, Hefei 230036, China ; 4. College of Environmntal Sciences, Hohai University, Nanjing 210098, China |
| Abstract: | There is an increasing interest in the bioaccumulation processes of rare earth elements(REEs) due to the wide application of REEs in a variety of non-nuclear industries,agriculture and medicine,resulting in possible environmental contamination.However,most previous studies focused on the characteristics of single REEs,and less attention has been paid to the fractionation of REEs in bioaccumulation process,as the REEs comprise a group of trivalent metallic elements with similar chemical properties.In this st... |
| Keywords: | rare earth elements fractionation organic ligand speciation bioaccumulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《生态学报》浏览原始摘要信息 | |
| 点击此处可从《生态学报》下载免费的PDF全文 | |