Distribution Characteristics of Water Pollution in the Sea Area of Wanning Moon Island, Hainan

In this paper, the content and distribution characteristics of chemical oxygen demand (COD), inorganic nitrogen (DIN), active phosphate (PO43−), sulfide and petroleum of the Hainan moon Island before and after the demolition were studied. The results show that the concentrations of COD, DIN, PO43−, sulfide and petroleum can meet the first quality standard of Seawater Quality Standard which indicating that the water quality of the sea area are good. The coefficients variation of COD, sulfide, phosphate (PO43−), inorganic nitrogen (DIN) and petroleum were 54.70, 32.87, 61.72, 59.86 and 70.91%, respectively, indicating that the distribution of each pollutant was relatively average. In this study, SPSS was used to conduct correlation analysis of pollutants, and the results showed that COD, inorganic nitrogen and active phosphate had good correlation and homology, and were the main pollutants in the sea area, which were greatly affected by human activities.