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为详细了解湛江港湾海洋沉积物的氧化还原特征,于2009年5月调查了湛江港湾表层沉积物氧化还原电位的大小、分布特征及其影响因素。结果表明,湛江港湾表层沉积物总体上为还原环境,Eh在-63～-268 mV之间变化,大部分在-230 mV左右;从湾内到湾外,表层沉积物的Eh区域分布不均一,同一断面近岸较低、中部较高。相关性分析表明,海湾表层沉积物的氧化还原行为主要受硫化物影响,而pH、TOC的影响甚微,其原因主要是受到水动力因素和航道疏浚作业的影响。
In order to understand the redox characteristics of marine sediments in Zhanjiang Harbor in detail, the redox potential of Zangjiang Harbor sediment in May 2009 was investigated for its size, distribution and influencing factors. The results show that the surface sediments of Zhanjiang Harbor are generally in a reducing environment with Eh ranging from -63 to -268 mV, mostly around -230 mV. The Eh distribution of surface sediments is not uniform from the bay to the bay, The same section near the shore is lower, the central higher. Correlation analysis shows that the redox behavior of surface sediments in the Gulf is mainly affected by sulfide, while the effects of pH and TOC are negligible. The main reasons are the influence of hydrodynamic factors and channel dredging operations.