[Copper complexing capacities of seawater in surface microlayer in Jiaozhou Bay].

Copper complexing capacities (CC) and conditional stability constants (K) of seawater surface microlayer (SML) and subsurface layer (SSL) in Jiaozhou Bay were determined by the anodic stripping voltammetry (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 x 10(-7) mol x L(-1), 2.45 x 10(-7) mol x 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. K(SML) is lower than K(SSL) in March and September, but K(SML) is higher than K(SSL) 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 complexing capacities and COD, DOC of SML and SSL is found, comparing to the negative relationship between copper complexing capacities and TN, TP.