| 大地震发生的网络性质——兼论有关地震预测的争论 |
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| 引用本文： | 郑宝山,王滨滨,朱广伟,余孝颖.大地震发生的网络性质——兼论有关地震预测的争论[J].地学前缘,2001,8(2):0-0. |
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| 作者姓名： | 郑宝山 王滨滨 朱广伟 余孝颖 |
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| 作者单位： | 中国科学院地球化学研究所 |
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| 基金项目： | 国家自然科学基金!资助项目 (496 732 0 3) |
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| 摘 要： | 大量研究结果证实 ,人体摄入的碘 80 %以上来自于食品 ,因此 ,碘缺乏病病区的形成应归因于植物含碘量的区域性差异。植物中的碘来自于大气和土壤 ,至今科学尚不能搞清在不同情况下 ,哪一部分碘占据主要部分。土壤中的碘与成土母岩中的碘含量基本无关 ,土壤碘含量主要决定于母岩风化产物对大气干湿沉降碘的吸收和保持能力。限于植物和大气中碘测定的困难 ,在碘的地球化学与碘缺乏病病区成因的问题上 ,目前仍有许多未解之谜。笔者提出 ,土壤中某种形态的碘可能以气态挥发并在近地大气层富集 ,存在植物吸收利用这一部分碘的条件的地区 ,不会有碘缺乏病的流行。
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| 关 键 词： | 碘 大气 植物 地球化学 |
| 文章编号： | 1005-2321(2001)02-0359-07 |
| 修稿时间： | 2001年1月5日 |
ENVIRONMENTAL GEOCHEMISTRY OF IODINE IN ATMOSPHERE AND PLANT —REVIEW AND A HYPOTHESIS |
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| ZHENG Bao-shan,WANG Bin-bin,ZHU Guang-wei,YU Xiao-ying.ENVIRONMENTAL GEOCHEMISTRY OF IODINE IN ATMOSPHERE AND PLANT —REVIEW AND A HYPOTHESIS[J].Earth Science Frontiers,2001,8(2):0-0. |
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| Authors: | ZHENG Bao-shan WANG Bin-bin ZHU Guang-wei YU Xiao-ying |
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| Abstract: | Many previous studies have demonstrated that food supplies more than 80% of total iodine intake of human being. Therefore, the development of iodine deficiency disorders (IDD) is a result of various iodine content of different territorial plants. Iodine in plants is from atmosphere and soils, but it is still uncertain that which one is the main source under the various conditions. Iodine content in soils is not determined by the iodine content in the parent rocks but their weathering offspring’s absorption and preservation of the iodine of the dry and wet precipitation from atmosphere. Because it is difficult in analyzing iodine in plants and atmosphere, there are lots of puzzles in the geochemistry of iodine and the causes of IDD development. A possibility of certain speciation of iodine vaporizing and accumulating at the low altitude atmosphere from the soils is proposed. No IDD occurs in the region where plants have the ability to absorb the iodine from low altitude atmosphere. |
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| Keywords: | iodine atmosphere plant geochemistry |
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