【作者】 王爱红；

【导师】 马启敏；

【作者基本信息】 中国海洋大学 ， 环境工程， 2006， 硕士

【摘要】 本课题来源于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)。本文采用阳极溶出伏安法(ASV),选择Cu、Pb作为表征渤海海水重金属络合容量的参考金属,以黄河口及其附近海域和大连开发区近岸海域作为渤海典型海域,通过测定海水中铜的络合容量(CuCC)和铅的络合容量(PbCC),探讨了其分布和变化规律,为研究渤海重金属的迁移、转化过程和环境容量提供技术支撑,进一步对调查海域溶解态Cu的形态和潜在毒性进行初步研究,结合海水交换周期,对莱州湾、渤海湾、渤海中部海域海水对Cu的自净能力进行了初步定量估算,得到主要结论如下:(1)黄河口及其附近海域海水重金属络合容量黄河口及其附近海域表层海水CuCC平均值为398.4nmol/L,lgKCu平均值为8.35;表层海水PbCC平均值为212.9nmol/L,lgKPb平均值为7.91。底层海水CuCC平均值为376.2nmol/L,lgKCu平均值为8.21;底层海水PbCC平均值为144.4 nmol/L,lgKPb平均值为7.87。黄河口及其附近海域海水中CuCC>PbCC,表层海水中CuCC、PbCC的平均值都高于底层水的其平均值。黄河口及其附近海域表层海水CuCC的分布特征与表层海水COD的分布特征相似,自南向北逐渐减小,且南部海区高、分布不均,北部海区低、分布均匀;表层海水PbCC的分布特征与CuCC的分布特征相似,也是南部海区高,北部海区低。(2)大连开发区近岸海域海水重金属络合容量大连开发区近岸海域表层海水CuCC平均值为543.6nmol/L,lgKCu平均值为7.35;表层海水PbCC平均值为276.3nmol/L,lgKPb平均值为7.57。大连开发区近岸海域表层海水中CuCC>PbCC,这与黄河口及其附近海域海水中的测量结果相一致,但大连开发区近岸海域表层海水中CC值比黄河口及其附近海域表层海水CC值(平均值)高。大连开发区近岸海域表层海水CuCC的分布特征是近岸海域低,南部海区较高,中部出现CuCC的高值区,北半部海区CuCC值自南向北逐渐减小,南半部更多还原

【Abstract】 The heavy metal complexation capacity, CC, of nature water is a quality parameter which measures the ability of the system to complex heavy metals. The thesis is based on the study to the sea area near the Yellow River estuary and the sea area near Dalian ETD Zone of the Bohai Sea, which are selected as typical areas. Copper and plumbum are selected as reference metals. By using anodic stripping voltammetry (ASV) technique combined with‘pre-equilibrium’complexometry, the Copper complexation capacity (CuCC) and plumbum complexation capacity(PbCC) of the seawater and the conditional stability constants (K) of metal-ligands of seawater samples collected in the typical areas of the Bohai Sea are determined. The thesis also studies the changing rules and distribution rules of the typical areas. On this basis, the thesis makes further research on copper ion’s toxicity and the self-purification capacity of seawater to copper. From these srudies, we have obtained the several conclusions as following:a) The CC of the sea area near the Yellow River estuaryThe mean value of CuCC in the sea area near the Yellow River estuary for the surface seawater is 398.4nmol/L, the mean value of lgKCu is 8.35; The mean value of PbCC is 212.9nmol/L, the mean value of lgKPb is 7.91. The mean value of CuCC is 376.2nmol/L for the bottom seawater, the mean value of lgKCu is 8.21; The mean value of PbCC is 144.4nmol/L, the mean value of lgKPb is 7.87. The order of CuCC, PbCC is as follows: CuCC>PbCC.The distribution characteristic of CuCC in the sea area near the Yellow River estuary for the surface seawater is that the south sea area is high and its distribution is badly-proportioned, the north sea area is low and its distribution is well-proportioned. The distribution characteristic of PbCC is similar to CuCC’, which is high in the south sea area, low in the north sea area.b) The CC of the sea area near Dalian ETD ZoneThe mean value of CuCC in the sea area near Dalian ETD Zone for the surface seawater is 543.6nmol/L, the mean value of lgKCu is 7.35; the mean value of PbCC is 276.3nmol/L, the mean value of lgKPb is 7.57. The order of CuCC, PbCC in the sea area near Dalian ETD Zone for the surface seawater is as follows: CuCC>PbCC,更多还原