Study of dissolved Copper(II) Speciation at Coastal Water of Peninsular Malaysia

Samples from Perhentian and Pangkor Island Marine Park, Peninsular Malaysia were analyzed for Cu(II) speciation by using CLE-AdCSV. Northeast monsoon's effect was studied in Perhentian and compared with Pangkor. Excess concentration of CuL found for all stations in both islands showed > 99.5% of total dissolved Cu (dCu) was bound to Cu (II) complexing ligands. The log K'(CUL)>12 data indicated the presence of strong natural ligands (L1) in Perhentian Island. Lower log K' (log K'=10 to 12) and two types of ligands (L-1 and L-2) were found in Pangkor Island. The ratio of CuL/dCu was analyzed to see the ligand distribution and saturation rate, and saturation rate with dissolved Cu. Statistical analysis showed weak relationship between the in-situ parameters to log K' values (p>0.05).The log K'(CUL)(PP: 12.00-12.96, PG: 10.93-12.840) data suggested that the dissolved Cu are used by marine organisms, thus preventing the free Cu2+ ions to be produced.