Chemical and Biological Analyses of Bay Sediment Where Magnesium Oxide Compounds Are Applied

  • Cho, Daechul (Department of Energy & Environmental Engineering, Soonchunhyang University) ;
  • Jiang, Sunny (Department of Civil and Environmental Engineering, University of California) ;
  • Kwon, Sung-Hyun (Department of Marine Environmental Engineering and, Engineering Research Institute, Gyeongsang National University)
  • Received : 2013.12.17
  • Accepted : 2014.01.10
  • Published : 2014.03.30


Three magnesium compounds, $MgO_2$, MgO, and $Mg(OH)_2$, which are supposed to supply oxygen continuously, were applied onto contaminated bay sediment and its ecology in order to activate the local microbial flora. Those compounds were found to reduce chemical oxygen demand (COD), total nitrogen (T-N), and total phosphorus (T-P). Magnesium oxide, in particular, reduced COD by 30% and T-N and T-P considerably. All compounds also suppressed the release of pollutants in the order $MgO_2$, MgO, and $Mg(OH)_2$. Analysis of microbial flora showed that the microbial group treated by $MgO_2$ and $Mg(OH)_2$ was predictably stable; meanwhile, that treated by MgO increased the number of species, but decreased the total number of microorganisms.


Supported by : National Research Foundation of Korea


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