Abstract

Edrianna Godon¹, Khairul Nizam Mohamed^1,2, Mohamad Azrul Gani^1,2 and Shamsuddin Johan^1,2

DOI : http://dx.doi.org/10.13005/ojc/3404021

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.

Cu Speciation; Cu Toxicity; Northeast Monsoon; CLE-AdCSV; South China Sea

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