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引用本文:汪福顺,刘丛强,梁小兵,魏中青,李军,徐海.湖泊沉积物中微量金属二次迁移过程中微生物作用的实验研究.湖泊科学,2006,18(1):49-56. DOI:10.18307/2006.0107
WANG Fushun,LIU Congqiang,LIANG Xiaobing,WEI Zhongqin,LI Jun,XU Hai.Impact on the remobilization of trace metals in lake sediments by micro-organisms. J. Lake Sci.2006,18(1):49-56. DOI:10.18307/2006.0107
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湖泊沉积物中微量金属二次迁移过程中微生物作用的实验研究
汪福顺1,2, 刘丛强2, 梁小兵2, 魏中青2, 李军2, 徐海2
1.华东师范大学河口海岸国家重点实验室, 上海 200062;2.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
摘要:
蓄积在湖泊沉积物中污染物质某些情况下可以成为威胁上覆水体水质安全的二次污染源.根据贵州省阿哈湖季节性缺氧的特性,通过控制氧化还原状况,设计了对该湖沉积物-水柱的原样/抑菌条件的培养实验.实验发现,微生物活动对界面附近氧化还原反应具有控制作用;改变水体的含氧状况可以显著影响上覆水体水质,包括表观性状和水体中污染物含量.聚类分析结果表明,早期成岩过程中Mn,Ga,SO42-,Cu,Cr,Pb和Co,Ni,Fe,Sc,V,Rb两大类分别具有相似的地球化学行为.根据实验结果,计算了厌氧培养过程中,微量元素的最大释放量,发现铁、锰在厌氧过程中可以大量向水体释放.
关键词:  湖泊沉积物  微量元素  释放  抑菌培养  阿哈湖
DOI:10.18307/2006.0107
分类号:
基金项目:中国科学院重要方向项目(KZCX3-SW-140,KZCX2-105);国家自然科学基金(40303013);贵州省基金(2004[3081])联合资助
Impact on the remobilization of trace metals in lake sediments by micro-organisms
WANG Fushun1,2, LIU Congqiang2, LIANG Xiaobing2, WEI Zhongqin2, LI Jun2, XU Hai2
1.State Key Lab. of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, P. R. China;2.State Key Lab. of Environmental Geochemistry, Institute Geochemistry, CAS, Guiyang 550002, P. R. China
Abstract:
It is of great concerns on some pollutants cumulated in lake sediments to become the source of pollution, under certain circumstances, causing serious harm on overlying water quality. In this research, experiment was designed based on the fact of seasonal hypoxia near sediment-water interface (SWI) in Lake Aha,Guizhou Province. By means of the control of redox potential, together with microbiological activities, it was found that microbiological activities has significant influences on the redox reactions happened around SWI; and the overlying water quality can be changed remarkably, along with the variation of redox potential, including transparency, odor and poUutant contents. The cluster analysis of experimental data demonstrated that two main groups with similar geochemical behavior during diagenesis process, could be sorted as Mn,Ga, SO42-,Cu,Cr,Pb and Co,Ni,Fe, Sc,V, Rb. Finally, the maximum release of some metals when lake water turned to hypoxia, were calculated, of which plenty of Fe and Mn found can be released into overlying water.
Key words:  Lake sediments  trace metals  releasing  micro-organisms  Lake Aha
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