摘要
采用阳极溶出伏安法(ASV)对1999年10月采自浙江省三门湾健跳港表层海水中溶解态铅的形态进行了分析,结果表明:海水中游离态铅的浓度为2.2 nmol/dm3,有机配位态则可分为两类,即PbL1和PbL2;两类有机配位体条件稳定常数的对数(logKpcobnLd1,pb2+和logKpcobnLd2,pb2+)分别为8.4和9.1;两类有机配位体浓度(L1和L2)分别为37.4 nmol/dm3和52.7 nmol/dm3,将上述结果与以往三门湾海区研究中海洋生物急性毒性试验结果和不同介质中铅含量进行对比可知,浙江三门湾健跳港海区表层海水中溶解态铅浓度对海洋生物是安全的,但个别底栖生物物种中较高的铅含量已影响到人类的食用安全。
For discovering the speciation of lead in the coastal water, Anodic Stripping Voltammetry （ASV） method was used to detect lead speciation of surface sea-water in Jiantiao Harbor of Sanmenwan Bay, Zhejiang Province. The results show that concentration of free lead is 2.2 nmol/dm^3. The organic ligands in sea water complexation with lead could be divided into two kinds ：L1 and L2. Conditional stability eond constants of different ligands is logKpbL1,pb^2＋ ^cond=8.4 and logKpbL2,pb^2＋ ^cond = 9.1 respectively, while concentrations of different ligands is L1=37. 4 nmol/dm^3 and L2=52.7 nmol/dm^3. Compared acute toxicity of lead to different marine organism and lead concentration in various media in literatures ,conclusion was made that the solved lead in surface sea water of Jiantiao Harbor is safe to local marine organism, but lead in individual benthos affect food security.
出处
《海洋学研究》
北大核心
2008年第1期22-29,共8页
Journal of Marine Sciences
基金
国家自然科学基金资助项目(40206012、40076025)
浙江省自然科学基金资助项目(499021)
我国近海海洋综合调查与评价资助项目(908-02-04-02)
关键词
海水
铅
配位体
条件稳定常数
安全浓度
sea water
lead
ligands
conditional stability constant
safe concentration
