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《Earth and Environment》 2013-01
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Application of Microelectrode Measurement System in Research on Biogeochemical Processes across the Water-Sediment Interface in Hongfeng Lake

WANG Jing-fu1,2,CHEN Jing-an1,,ZENG Yan1,2, YANG Yong-qiong1,2,YANG Hai-quan1,2,JI Yong-xue1,2(1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences, Guiyang 550002,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
Micro-scale distributions of oxygen and H2S across the water-sediment interface in Lake Hongfeng,which is a deep lake in southwestern China,were measured with microelectrodes.Results showed that the diffusive fluxes,J,of O2 across the water-sediment interface in two sampling sites were respectively 5.80 and 7.65 mmol·m-2·d-1.Oxygen penetration depths in the sediments were 3.6±0.3 and 3.4±0.9 mm,respectively.Vertical distribution of H2S in the sediments was related with sediment composition,oxygen consumption rate and the activity of sulfate-reducing bacteria(SRB).High-resolution microelectrode technique,whose determination results have been proved to be reliable,was of great value in the study of biogeochemical processes across the water -sediment interface in a lake.
【Fund】: 贵阳市科学技术计划项目;; 国家科技支撑计划项目(2011BAC02B02)联合资助
【CateGory Index】: X832
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