北部湾东侧沉积物硫酸盐还原菌含量及其意义

Content of Sulphate-Reduing Bacteria in the Sediment on the East Side of Beibu Gulf and Its Significance

关键词:  硫酸盐还原菌  北部湾  沉积物  腐蚀  环境

Key words:  sulphate reducing bacteria  Beibu Gulf  sediment  corrosion  environment

摘要:

用MPN(the Most Probable Number)法测定了北部湾东侧沉积物硫酸盐还原菌(SRB)含量,表层沉积物SRB的检出率约76.3%。浅层(表层下0.5m~3.7m)中是31.3%。表层和浅层中各自的SRB平均含量分别是1760.0个每克(湿重,下同)和344.4个每克。分析了测区不同区域的SRB含量分布。讨论了SRB含量与硫化物(W_s^2-)、Eh、T(℃)、pH值间的关系和对腐蚀环境评价的意义。

Abstract:

The content of sulphate reducing bacteria(SRB) in the sediment on the east side of Beibu Gulf was determinated by using the most probable number (MPN) method. The percentage detection of SRB in the surface sediment was about 76.3%, that in the shallow layer of the sediment(0.5 m~3.7 m under the surface sediment) was 31.3%. Average content of the SRB were 1760.0cells·g^-1 (wetbasis), (the same below) and 344.4 cells·g^-1 in the surface sediment and the shallow one respectively. The content distribution of the SRB was analysed in the different area determinated. The relationships among SRB content and sulphide (W_s^2-)、Eh、T(℃)、pH value were discussed, and the significance of SRB to evalute the environmental corrosion was also explained.