巢湖的稀土元素地球化学特征
Geochemical characteristics of rare earth elements in Lake Chaohu, East China
查看参考文献28篇
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文摘
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采用液-液萃取法和ICP-MS测试技术对巢湖的溶解态稀土元素进行了分析.结果表明,巢湖的溶解态稀土的含量与世界淡水相当,丰水期的样品含量高于其他季节.pH值和悬浮物、胶体是控制巢湖水体中溶解态稀土含量的主要因素.巢湖的溶解态稀土的分布模式以平坦型为主,少数呈现重稀土富集.丰水期和枯水期的溶解态稀土的(La/Yb)N值从西半湖区到东半湖区呈现有规律性的逐渐增大,并且丰水期的(La/Yb)N值低于枯水期.在富营养化湖泊中,胶体和水生生物可能是造成这一现象的主要原因. |
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其他语种文摘
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The dissolved rare earth elemenls (REEs) in the aquatic environment of Lake Chaohu were determined by inductively coupled plasma mass spectrometry (ICP-MS) after solvent extraction and back-extraction. The results show that the concentrations of dissolved REEs in Lake Chaohu are similar to those in freshwater of the world. Furthermore, these concentrations of dissolved REEs during high-water period are clearly higher than those during low-water season. The concentrations of dissolved REEs are mainly controlled by pH and the concentration of suspended and colloidal particles. The dissolved REEs in most lake waters show flat NASC-normalized REE patterns, but a few samples showing heavy REE enrichment relative to NASC. The values of (La/Yb)_N in high-water period and low-water season increase from west to east, and they in high-water period are larger than those in low-water season. These phenomena might be mainly resulted from colloidal particles and hydrophytes in the eutrophication lake. |
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来源
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地球化学
,2006,35(6):639-644 【核心库】
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关键词
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稀土元素
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pH值
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胶体
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悬浮物
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富营养化
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巢湖
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地址
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1.
天津师范大学, 天津市水资源与环境重点实验室, 天津, 300387
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中国科学院,地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学;环境科学基础理论 |
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基金
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中国科学院知识创新工程重要方向项目
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国家973计划
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国家自然科学基金
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文献收藏号
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CSCD:2656785
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