胶州湾海洋微表层铜络合的容量

Copper Complexing Capacities of Seawater in Surface Microlayer in Jiaozhou Bay

采用阳极溶出伏安法测定了2004年胶州湾海水微表层和次表层金属铜离子的络合容量和条件稳定常数,系统地探讨了其分布规律及其与COD、DOC、TN和TP的相关性.结果表明,胶州湾海水微表层铜络合容量有富集现象,平均值微表层为3.85×10-7mol.L-1,次表层为2.45×10-7mol.L-1,富集倍数1.56.条件稳定常数(lgK)微表层为7.21,次表层为7.21;且3月、9月微表层小于次表层,6月、12月微表层大于次表层.胶州湾铜络合容量东北部>西北部>南部>中部>湾口;且9月>6月>12月>3月.海水微表层和次表层铜络合容量与COD、DOC存在显著正相关性,而与TN、TP存在较好负相关性.

Copper complexing capacities （CC） and conditional stability constants （K） of seawater surface mierolayer （SML） and subsurface layer （SSL） in Jiaozhou Bay were determined by the anodic stripping vohammetry （ASV） technique in 2004. The distribution regularity and the relationship with COD, DOC, TN, TP of Jiaozhou Bay were discussed systematically. The results are as following： The copper complexing capacities show the enrichment phenomenon of SML in Jiaozhou Bay. The average copper complexing capacities of SML and SSL are 3.85×10^-7mol·L^-1, 2.45×10^-7mol·L^-1 respectively, and the average enrichment factor of SML is 1.56. The average conditional stability constants （lgK） of SML and SSL are the same 7.21. KSML. is lower than KSSL in March and September, but KSML is higher than KSSL in June and December. The copper complexing capacities in Jiaozhou Bay become lower by one turn of northeast, northwest, south, center, entrance and the other turn of September, June, December, March. Meanwhile the obviously positive relationship between copper eomplexing capacities and COD, DOC of SML and SSL is found, comparing to the negative relationship between copper complexing capacities and TN, TP.