Accumulation of Rare Earth Elements in Spinach and Soil under Condition of Using REE and Acid Rain Stress
来源期刊：JOURNAL OF RARE EARTHS2002年第2期
论文作者：李心清 王世杰 严重玲 梁洁 林鹏 洪业汤
Key words：rare earths; acid rain stress; spinach; soil;
Abstract: The content and distribution characteristics of REE in spinach and soil under using REE and acid rain stress were studied by pot experiments. The results show that the content of REE is 0.527～0.696 (μgg-1) in the above-ground portion of spinach, 2.668～3.003 (μg*g-1) in the under-ground portion of spinach and 229.09～250.30 (μg*g-1) in the soil. With the acidity of acid rain increasing, the leaching of REE in plants and soil is strengthened and the amount of REE reduces with decreasing of pH value. After REE are used, though plants show the selective absorption to Ce group elements (especially spraying on leaves), regardless under acid rain stress or using REE or not, the distribution model of REE in the above-ground and under-ground portion of plants is basically the same with the control. Plants also follow the Oddo-Harkins rule of the REE of distribution abundance, light rare earth elements is enriched, the minus of Eu is abnormal and admeasure of Ce is a rich model. The results show that REE in plants mainly come from soil and are affected by it.
李心清1，王世杰2，严重玲3，梁洁3，林鹏3，洪业汤2
(1.College of Resource and Environment Science, Lanzhou University, Lanzhou 730000, China;
2.State Key Laboratory of Environmental Geochemistry, Chinese Academy of Science, Guizhou 550002, China;
3.School of Life Sciences, Xiamen University, Xiamen 361005, China)
Abstract:The content and distribution characteristics of REE in spinach and soil under using REE and acid rain stress were studied by pot experiments. The results show that the content of REE is 0.527～0.696 (μgg-1) in the above-ground portion of spinach, 2.668～3.003 (μg*g-1) in the under-ground portion of spinach and 229.09～250.30 (μg*g-1) in the soil. With the acidity of acid rain increasing, the leaching of REE in plants and soil is strengthened and the amount of REE reduces with decreasing of pH value. After REE are used, though plants show the selective absorption to Ce group elements (especially spraying on leaves), regardless under acid rain stress or using REE or not, the distribution model of REE in the above-ground and under-ground portion of plants is basically the same with the control. Plants also follow the Oddo-Harkins rule of the REE of distribution abundance, light rare earth elements is enriched, the minus of Eu is abnormal and admeasure of Ce is a rich model. The results show that REE in plants mainly come from soil and are affected by it.
Key words:rare earths; acid rain stress; spinach; soil;
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