【作者】 程娟；

【导师】 马启敏；

【作者基本信息】 中国海洋大学 ， 环境科学， 2006， 硕士

【摘要】 本文根据国内外对重金属络合容量的研究现状,采用阳极溶出伏安法,在国家自然科学基金重点课题“渤海典型环境负荷物的迁移、转化过程和环境容量研究”(批准号:40136020)的支持下,研究了黄海海域表层海水重金属Cu的络合容量及其分布规律,为黄海重金属迁移转化过程和环境容量研究提供技术支撑;以日照港为例,研究了养殖区内表层海水重金属Cu的络合容量,为了解黄海海域养殖区内重金属Cu的存在形态、对养殖生物的毒性提供了技术支撑;以青岛近岸为例,连续测定了七、八月份表层海水铜络合容量(CuCC),初步探讨了CuCC与化学需氧量(COD)、溶解有机碳(DOC)之间的关系。主要结果如下:黄海海域表层海水CuCC的平均值为385.3nmol/L;条件稳定常数对数值(lgK)的平均值为7.65;络合容量指数(CCI)平均值为76.94%;黄海海域表层海水的CuCC在西部青岛近岸处较高,在中部较低;lgK在黄海北部和青岛近岸较低,在中部较高。黄海海域表层海水的CuCC比渤海湾北部、南海海域的CuCC低,比黄河口、杭州湾、海口湾等海域高;lgK值与黄河口、南海海域相近,比渤海湾北部、杭州湾、海口湾等海域低。总体来说,黄海海域表层海水的平均络合能力较弱。日照港养殖区表层海水CuCC的平均值为407.1nmol/L;lgK的平均值为8.23;CCI的平均值为88.12%。养殖区表层海水的CuCC基本上是在中心低四周高,高值区出现在养殖区的东南部;lgK的分布与CuCC不同,高值出现在养殖区的东北部。养殖区内表层海水的重金属Cu络合能力要比黄海海域(非养殖区)表层海水高,主要原因可能是养殖区有机污染较重。青岛近岸七月份表层海水CuCC平均值为678.0nmol/L;lgK平均值为7.78;COD平均值为1.03mg/L;DOC平均值为1.42mg/L。八月份表层海水CuCC平均值为744.9nmol/L;lgK平均值为7.90;COD平均值为1.12mg/L;DOC平均值为2.87mg/L。青岛近岸七、八月份表层海水CuCC与COD之间的相关系数分别为0.0002、0.1402;CuCC与DOC之间的相关系数分别为0.1433、0.0432。总体来说,青岛近岸七、八月份表层海水CuCC与COD、DOC之间的相关性都不显著。更多还原

【Abstract】 This paper based on the task of“Study on Mobility, Transformation of Typical Environmental Contaminations and Environmental Capacity in the Bohai Sea”. The heavy metal complexation capacity (CC) of natural waters is a quality parameter which measures the ability of the system to complex heavy metals. By using anodic stripping voltammetry (ASV) technique combined with“pre-equibrium”complexo- metric titration, CC and the conditional stability constant (K) of metal -ligands of seawater samples collected in the Yellow Sea, Rizhao Sea-farming area and offshore at Qingdao city are determined. This paper also studies the changing rules and distri- bution rules of these areas. All the research provides primary data to CC in the surface seawater of the Yellow Sea. The main results achieved are as follows:In the surface seawater of Yellow Sea the mean value of copper complexation capacity (CuCC), lgK and Complexation Capacity Index (CCI) is 385.3nmol/L, 7.65 and 76.94% respectively. CuCC is larger in offshore areas and smaller in the middle of the Yellow Sea, while lgK is just the reverse. CuCC in the Yellow Sea is smaller than CuCC in the North area of the Bohai Bay and the South Sea, while larger than CuCC in the Yellow River estuary, Hangzhou Bay and Haikou Bay. Lgk in the Yellow Sea is similar to lgK in the Yellow River estuary and the South Sea, while smaller than lgK in the North area of the Bohai Bay, Hangzhou Bay and Haikou Bay. There- fore, the surface seawater of the Yellow Sea has a weaker complexation capacity with copper.The mean value of CuCC, lgK and CCI is 407.1nmol/L, 8.23 and 88.12% res- pectively in the sea-farming area of Rizhao.CuCC is the smallest in the middle of the sea-farming area, larger in the southeast, while lgK is larger in the northeast. The ability of surface seawater of sea-farming areas to complex copper is stronger than the Yellow Sea possibly because there is more organic contaminations in the sea-farming areas.更多还原