Level and health risk assessment of arsenic in milkfish (Chanos chanos Forsskal) cultured in the west bay of Laguna Lake / Lowell Carpio Bernados.

Thesis Bachelor of Science in Environmental Science University of Rizal System Tanay 2019

Includes bibliographical references.

The human health risks associated with arsenic exposure from milkfishes cultured in west bay of Laguna Lake were assessed. The levels of arsenic in water and fish samples were determined using Atomic Absorption Spectrophotometry - Hydride Vapor Generation Technique. The other physicochemical properties of water were determined using HORIBA multi-parameter water quality meter. All of the physicochemical properties of water in all sampling sites are within the water quality standard of Class C water set by the Department of Environment and Natural Resources except pH. All of the levels of arsenic in milkfishes from all sampling sites were below 0.005 mg/kg. The computed THQ value of arsenic in milkfish in all sampling sites is less than 2.88 X 10-4. Hence, any adverse non-carcinogenic health risks were not demonstrated in this study since all the computed THQs were less than 1. The average lifetime cancer risk value associated with consumption of milkfish in all sampling sites is less than 5.56 X 10-8. Since the computed TR value is lower than the threshold value of 1.0 X10-6, the ingestion of arsenic through the consumption of milkfish collected from the sampling sites do not pose appreciable risk of developing skin cancer during a lifetime.

Best Descriptive Research - 9th University Students' Research Congress