稳定碳同位素在海洋倾倒活动监测中的应用

Application of stable carbon isotope composition to monitor ocean dumping movement

通过测定倾倒区海域沉积物,产品码头和原油码头的疏浚物的有机碳同位素,分析来自不同区域的样品同位素变化特征,结果显示各区域碳同位素值有较大的差别。倾倒区有机碳同位素在-22.95‰～-23.05‰之内变化;产品码头疏浚物有机碳同位素在-25.20‰～-23.50‰;原油码头疏浚物碳同位素在-22.35‰～-21.89‰。通过碳同位素变化特征可以界定悬沙大致扩散范围。经混合配比实验,得到碳同位素组成与配比系数之间的关系,由此可推算倾倒活动中各码头的倾倒量。

The samples were collected form the sediment in ocean dumping area and dredged materials in the product and crude oil shipside.The stable carbon isotope compositions in the samples were measured.The result showed that there was a large difference of stable carbon isotope compositions in different areas.The carbon isotope values ranged from-22.95‰ to-23.09‰ in the dump ocean;The carbon isotope ratios were between-25.20‰ and-23.50‰ in the product shipside;and the heaviest carbon isotope compositions were observed in the crude oil shipside,which were reached to-22.35‰^-21.89‰.The mixture experiments were carried out in this study,and the relationship between the stable carbon isotope compositions and the mixing ratios were found,which estimated the dump situation of either shipside and judge whether the dumping movement was suitable or not.