Study of dissolved copper (II) speciation at coastal water of Peninsular Malaysia

• Main Authors: Godon, Edrianna, Mohamed, Khairul Nizam, Gani, Mohamad Azrul, Johan, Shamsuddin
• Format: Article
• Language: English
• Published: Oriental Scientific Publishing Company 2018
• Online Access: http://psasir.upm.edu.my/id/eprint/73998/1/Study%20of%20dissolved%20copper%20%28II%29%20speciation%20at%20coastal%20water%20of%20Peninsular%20Malaysia.pdf; http://psasir.upm.edu.my/id/eprint/73998/

Samples from Perhentian and Pangkor Island Marine Park, Peninsular Malaysia were analyzed for Cu(II) speciation by using CLE-AdCSV. Northeast monsoon 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 (L1 and L2) were found in Pangkor Island. The ratio of CuL/dCu was analysed to see the ligand distributions, 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.