Correlation of water quality and heavy metal concentration in Chao Phraya River Basin: An effect on human health

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Naiyanan Ariyakanon


Heavy metal contamination in the river was a national problem in Thailand because the contaminant may be accumulated in sediment, aquatic organisms, entered the food chain, and affected human health. This study reported the correlation between heavy metal concentration and water parameters with stepwise multiple linear regression using observed data over ten years (2009-2018). The results indicated that the concentration of As, Cd, Cr, Cu, Pb, Hg, Mn, Fe, Ni, and Zn were closely related to pH, turbidity, Total Phosphorus (TP), NH3, and Dissolved Oxygen (DO). The stepwise multiple regression showed that 70% of the equation had r2 values greater than 0.842. The model in this study will be applied to predict heavy metal contamination in surface water. The Hazard quotient (HQ), Hazard index (HI), and Carcinogenic risk (CR) of adults and children were also calculated. The human health assessment information will be applied coupled with a multiple linear regression model to effectively manage heavy metal pollution in the Chao Phraya River.


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