| BIOGEOCHEMICAL MECHANISM OF POSTDEPOSITIONAL MIGRATION OF Fe AND Mn IN LAKE AHA, CHINA |
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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： | Wan Xi (Institute of Soil and Fertilizer，the Chinese Academy of Agricultural Sciences，Beijing 100081，P. R. China |
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| 摘 要： | I.INTRODUCTIONLakeAhaisamedium--sizedartificialreservoirwithseasonallyanoxichypolirnnion,andawaterresourceofGuizhouProvince,China,builtin1958,workedin1960andexpandedin1982.Ithasadrainagebasinof190kmZwithaverageannualtemperatureof15.3tandprecipitationof1109rum.Openplantcover,containiflgshrubandgrass,surroundsthelake,andsialliticandstfeteyellowsoilisdevelopedonPe~ianlimestoneandcoallayer,meanwhile,OThisprojectwassupportedbytheNationalNaturalaudienceFOundationofChinaandtheaudienceFOund…
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| 收稿时间： | 10 March 1997 |
Biogeochemical mechanism of postdepositional migration of Fe and Mn in Lake Aha, China |
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| Xi Wan,Guojiang Wan,Ronggui Huang,Yong Pu.BIOGEOCHEMICAL MECHANISM OF POSTDEPOSITIONAL MIGRATION OF Fe AND Mn IN LAKE AHA, CHINA[J].Chinese Geographical Science,1997,7(4):368-374. |
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| Authors: | Xi Wan Guojiang Wan Ronggui Huang Yong Pu |
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| Institution: | (1) Institute of Soil and Fertilizer, the Chinese Academy of Agricultural Sciences, 100081 Beijing, P. R. China;(2) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, the Chinese Academy of Sciences, 550002 Guiyang, P.R. China |
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| Abstract: | Lake Aha in Guizhou Province, China is a medium-sized artificial reservoir with seasonally anoxic hypolimnion. Long-term sedimentary accumulation of iron and manganese resulted in their enrichment in the upper sediments. In anoxic season, Fe2 and Mn2 formed from bioledcal oxidation, would diffuse upto upper water from sediments. However, the concentration of Fe2 incrlater and decreased earlier than that of Mn2 . Generally, Sulfate reduction occUrred at 6cm below the sediment-water interface. Whereas, in anoxic season, the reduction reached sediment top, inhibiting the release of Fe2 . As the oxidation of Mn2 required molecular oxygen as catalyst, Serious anoxia caused the violent diffusion of Mn2 . Based on the bio-effects on the accumulation of Mn in natural fresh water, it's necessary to seek a way to control manganese rerelease through accumulated manganese bacteria action.Keywrods: petdeopitional migration of Fe and Mn, biogaxhemical effect, Lake Aha |
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| Keywords: | postdepositional migration of Fe and Mn biogeochemical effect Lake Aha |
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