| 阿哈湖Fe、Mn沉积后再迁移的生物地球化学机理 |
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| 引用本文： | 万曦,万国江,黄荣贵,普勇.阿哈湖Fe、Mn沉积后再迁移的生物地球化学机理[J].湖泊科学,1997,9(2):129-134. |
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| 作者姓名： | 万曦 万国江 黄荣贵 普勇 |
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| 作者单位： | 中国农业科学院土壤肥料研究所!北京100081(万曦)，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!贵阳550002(万国江，黄荣贵，普勇) |
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| 基金项目： | 国家自然科学基金!49333040；49503049 |
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| 摘 要： | 贵州阿哈湖是一底层滞水带季节性缺氧的中型人工湖。由于长期积累。沉积物顶部微粒悬浮层出现了Ｆｅ、Ｍｎ富集。湖底缺氧时，经生物氧化作用形成的Ｆｅ＾２＋、Ｍｎ＾２＋自沉积物向上覆水体扩散，水体Ｆｅ＾２＋浓度增高比Ｍｎ＾２＋滞后出现且超过前结束。
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| 关 键 词： | 铁 锰 生物地球化学 阿哈湖 湖泊 沉积 |
| 收稿时间： | 4/8/1996 12:00:00 AM |
| 修稿时间： | 1996/7/12 0:00:00 |
Biogeochemical Effect on Postdepositional Remobilization of Fe-Mn in Lake Aha, Guizhou Province |
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| Wan Xi,Wan Guojiang,Huang Ronggui and Pu Yong.Biogeochemical Effect on Postdepositional Remobilization of Fe-Mn in Lake Aha, Guizhou Province[J].Journal of Lake Science,1997,9(2):129-134. |
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| Authors: | Wan Xi Wan Guojiang Huang Ronggui and Pu Yong |
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| Institution: | institute of Soil and Fertilizer, Chiese Academy of Agricultural Sciences, Beijing 100081,State Key Lab.of Environmental Geochemistry, institute of Geochemistry, CAS, Guiyang 550002,State Key Lab.of Environmental Geochemistry, institute of Geochemistry, CAS, Guiyang 550002 and State Key Lab.of Environmental Geochemistry, institute of Geochemistry, CAS, Guiyang 550002 |
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| Abstract: | Lake Aha, located in the suburb of Guiyang, Guizhou Province, is a medium artificial reservoir with seasonally anoxic hypolimina. After a long-term accumulation,iron and manganese are enriched in the upper sediments. When waters of oplimnion and hypolimnion are anoxic in late summer and early autumn. Fe2+ and Mn2+ formed by biological respiration, are diffused upto the overlying waters from the sediments. However. the concentration of Fe2+ increases later and secreases earlier than that of Mn2+. Generally, sulphate reduction takes place within 6cm depth of the sediments, Whereas in the anoxic season, the reduction reaches the upper sediment, inhibiting the diffusion of Fe2+.Meanwhile, manganese oxidation needing molecular oxygen as catalyst, causes the violent diffusion of Mn2+. Because manganese can be accumulated by microorganism in natural fresh water,it is important to seek method to control manganese remobilization through manganese accumulated action. |
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| Keywords: | Postdepositional remobilizaton of Fe-Mn biogeochemical effect Lake Aha |
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