| Experimental Study on the Effects of Organic Acids on the Dissolution of REE in the Weathering Crust of Granite |
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| 引用本文： | 陈炳辉 毋福海 等. Experimental Study on the Effects of Organic Acids on the Dissolution of REE in the Weathering Crust of Granite[J]. 中国地球化学学报, 2001, 20(2): 144-151. DOI: 10.1007/BF03165996 |
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| 作者姓名： | 陈炳辉 毋福海 等 |
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| 作者单位： | [1]DepartmentofEarthSciences,ZhongshanUniversity,Cuangzhou510275,China [2]GangdongPharmaceuticalCollege,Gua |
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| 摘 要： | The results of REE leached by some organic acids with various concentrations and water/rock ratios for different durations from a mixed samples of the weathering crust of a granite in Gonghe,Guangdong,China,showed that:1)the contents of REE leached increase with increasing concentrations of the organic acids;2) the contents of REE leached by 0.01mol/L organic acids increase with increasing water/rock ration;3) the interaction between the organic acids and the samples enhances the pH value of the medium and the contents of REE leached tend to increase with decreasing pH value;and 4) compared with those leached by ammonia sulfate,the REE leached by the organic acids are characterized by a weaker negative C e anomaly,a stronger negative Eu anomaly,and lower(La/Sm)N and (Gd/Yb)N ratios,indicating that the organic acids have made contributions to the fractionation of REE in the weathering crust.
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| 关 键 词： | 有机酸 REE 风化壳 稀土元素 花岗岩 |
Experimental study on the effects of organic acids on the dissolution of REE in the weathering crust of granite |
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| Binghui Chen,Fuhai Wu,Fufu Liu. Experimental study on the effects of organic acids on the dissolution of REE in the weathering crust of granite[J]. Chinese Journal of Geochemistry, 2001, 20(2): 144-151. DOI: 10.1007/BF03165996 |
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| Authors: | Binghui Chen Fuhai Wu Fufu Liu |
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| Affiliation: | 1. Department of Earth Sciences, Zhongshan University, 510275, Guangzhou, China
2. Guangdong Pharmaceutical College, 510244, Guangzhou, China
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| Abstract: | The results of REE leached by some organic acids with various concentrations and water/rock ratios for different durations from a mixed sample of the weathering crust of a granite in Gonghe, Guangdong, China, showed that: 1) the contents of REE leached increase with increasing concentrations of the organic acids; 2) the contents of REE leached by 0.01 mol/L organic acids increase with increasing water/rock ratio; 3) the interaction between the organic acids and the samples enhances the pH value of the medium and the contents of REE leached tend to increase with decreasing pH value; and 4) compared with those leached by ammonia sulfate, the REE leached by the organic acids are characterized by a weaker negative Ce anomaly, a stronger negative Eu anomaly, and lower (La/Sm)N and (Gd/Yb)N ratios, indicating that the organic acids have made contributions to the fractionation of REE in the weathering crust. |
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