Investigation of heavy metal copper complexing capacity and forms in the Xihu Harbour of Zhejiang, China

Based on the seawater samples collected from the Xihu Harbour of Zhejiang, China on June 10~ 14, 2000, AA - 800 graphite furnace atomic absorption spectrophotometer (AAS) and anodic stripping voltammetry (ASV) were used to determine the content of heavy metal copper in the samples and acquire that copper in seawater is controlled by different organic complexes. Compared with different particle sizes (1.00, 0.40, 0.20 um), the apparent copper complexation capacity (ACuCC) is respectively 144.4, 103.0 and 102.0 nmol/dm3;the conditional stability constants logarithm of copper organic ligand is respectively 9.14, 8.66 and 7.25. Total copper (21.72 nmol/ dm3) in the Xihu Harbour is higher. Copper all is steady dissolved, including pH2 acid dissolved copper 95.0 % and organic high complexing copper 5.0% . Dissolved organic complexing copper accounts for 61.6% of total copper in filtered seawater.