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Analysis of Heavy Metals in Seawater Samples Collected from the Port of Ozamiz, Philippines

Marie Rosellynn C. Enguito1, Angel Jhoyce Dispo2, Ken Jumawan2, Christopher Mahinay2, Eris Jhon Garvan2, Donn Karlo Unsang2, Leonel Rubio2, Esthanly Caguisa2, Ayam Permano2

The rapid economic growth in Ozamiz City and escalating human activities in its port may pose a threat to the water quality in the area. As an agricultural area, runoff from pesticides and fertilizer residues may also put the marine waters at risk of heavy metal pollution. Urbanization may also contribute to the threat of water pollution. The marine waters in the Port of Ozamiz have not yet been investigated for possible heavy metal pollution. Hence, this study aimed to conduct an analysis of the heavy metals [magnesium (Mg), copper (Cu), cadmium (Cd), zinc (Zn), iron (Fe), manganese (Mn), mercury (Hg), lead (Pb)] in the seawater samples from the Port of Ozamiz. Temperature, pH, dissolved oxygen, nitrite, alkalinity, and hardness were the physicochemical characteristics of the seawater determined also in this study. Water samples were collected following the standard methods. Heavy metal analysis was carried out at the Department of Science and Technology laboratory in Cagayan de Oro City. Water analysis for the physicochemical parameters was done at the Bureau of Fisheries and Agriculture laboratory in Ozamiz City. Results showed that concentrations of Mg, Cu, Zn, and Cd are above the normal accepted values. All physicochemical parameters were within the desirable range except the water hardness. This study may provide baseline information for the local government of the city to formulate plans that could help reduce heavy metal pollution in the area.

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