| REE geochemistry of Chaohu and Longgan lakes, eastern China |
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| 作者姓名： | Zhaozhou ZHU Congqiang LIU Zhongliang WANG Bo GAO Zhihua ZHOU Jun LI |
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| 作者单位： | [1]The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Guiyang 550002, China [2]The College of Resource, Environment ＆ Earth Sciences of Yunnan University, Kunming 650091, China |
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| 摘 要： | The rare-earth elements （REEs） are a series of elements including lanthanides with atomic numbers from 57 to 71, as well as Y with an atomic number of 39. The REEs are commonly used as geochemical tracers in the study of many geologic processes because of their unique and chemically coherent behavior. The main purpose of this research is to understand the effect of water-particle interaction on trace metal transport, the distribution and chemical species of the REEs in water through case studies on geochemical behavior of the REEs in the Chaohu and Longgan lakes, eastern China. Concentrations of the dissolved REEs were detected by ICP-MS （Inductively Coupled Plasma-Mass Spectrometry）. Before ICP-MS measurement, REEs were concentrated from water samples by using solvent extraction and back extraction with a mixture 65% HDEHP （2-etheylhexyl hydrogen phosphate） and 35% H2MEHP （2-ehtylhexyl dihydrogen phosphate）. The results showed that the average concentrations of dissolved REEs in summer are higher than in winter for Chaohu Lake： they were 162.6 ng/kg and 86.5 ng/kg, respectively. On the country, the REE contents of winter samples were higher than those of summer water samples for Longganhu Lake： they were 111.1 ng/kg and 44.0 ng/kg, respectively. The contents of suspended particulate matter and pH are the two important factors controlling the concentrations of dissolved REE in the lakes. The contents of the REEs decrease with increasing pH in the Longgan and Chaohu lakes. The suspended particulate matter shows different sorption/desorption toward the dissolved REEs in the two water bodies. Most lake water samples have a fiat NASC-normalized REE pattern, and the others have heavy REE-enrichment patterns relative to NASC, which may imply that the dissolved REEs were mainly present in the form of fine colloids in the Chaohu and Longgan lakes.
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| 关 键 词： | REE 湖泊 地球化学 稀土元素 |
REE geochemistry of Chaohu and Longgan lakes, eastern China |
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| Zhaozhou ZHU Congqiang LIU Zhongliang WANG Bo GAO Zhihua ZHOU Jun LI.REE geochemistry of Chaohu and Longgan lakes, eastern China[J].Chinese Journal of Geochemistry,2006,25(B08):150-150. |
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| Abstract: | |
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| Keywords: | REE lake concentration pattern |
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