The Estimation of Removed and Released COD Fluxes in Tongan Bay, Xiamen
- 海洋环境－已发表论文 
以COD为有机污染物指标 ,在不考虑水动力因素的条件下 ,根据实验室模拟实验的结果和相关的研究结果 ,估算了同安湾海域水体的生化净化作用、悬浮颗粒物沉积作用的去除通量和底质沉积物的再释放通量 .研究结果表明 :同安湾海域生化净化作用对有机污染物的去除通量为 10 42 9t·y-1,悬浮颗粒物沉积作用的去除通量为 4137t·y-1,而底质沉积物COD的最大可能释放通量为 3317t·y-1,说明该海域生化净化作用对有机物的去除占主导地位 ,而底质沉积物COD的释放量与悬浮颗粒物沉积作用的COD去除量大致相等 .因而在考虑同安湾污染物的总允许排放量时 ,可以只考虑水体COD的生化降解作用 ,而忽略悬浮颗粒物沉积的去除作用和底质沉积物释放的二次污染作用According to the results of laboratory simulation experiment and some relative researches, with COD as the index of organic pollutant, the flux of removing of biochemistry and suspended particulate matter (SPM) deposition, release of bottom sediment in Tongan Bay were estimated under the condition of neglecting hydrodynamic factor, which can provide important parameter and basis for the research of environment capacity in Tongan Bay. The results showed that the removed flux of organic pollutant by biochemical cleaning and by deposition of SPM was 10 429 and 4 137 t·y -1 , respectively, and the largest probably released flux of COD by bottom sediment was 3 317 t·y -1 . This indicated that cleaning of biochemistry played a leading role in removing of organic matter, the released flux of COD by bottom sediment was roughly equal to the deposition flux by SPM. Therefore, when thinking over permitted output discharge of pollutant in Tongan Bay, we can only consider the biochemistry degradation of COD in water body, and neglect deposition of SPM and the secondary pollution caused by bottom sediment releasing.