Ela Marie Sofia J. Celiz, Dustin Dwight M. Doctolero, Karli Anne O. Lao (March 2012)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
Dissolved oxygen is one of the chemical parameters that describe water quality. This study aimed to determine the concentrations of dissolved oxygen of the water discharged of the three major rivers of Banate Bay nameluy, Guintas, Tinorian, and Talokgangan during months of May to November 2011. Sampling was done every 14 days during the transition of high and low tides. Winkler Method was used in determining the DO concentrations wherein the fixing was done on-site and the titration part of the method was conducted in in Philippine Science High School – Western Visayas Campus Laboratory. Results show that the DO ranges from 1.3 to 6.17 mg/L with a mean of 3.40 mg/L. These concentrations were lower compared to the range of the bay which is from 5.8 mg/L. These concentrations were lower compared to the range of the bay which is from 5.8mg/L to 6.5mg/L and to the standards set by the DENR which has its minimum at 5 mg/L.