| Deposited sediments contain toxic heavy metals which can pollute surface water as well as aquatic eco-systems. In this study, accumulation of heavy metals in surface sediment collected from Set River, Hanoi city was assessed based on the geoaccumulation index (Igeo) and potential ecological risk was also assessed based on ecological risk index (RI) and risk assessment code (RAC). Heavy metals concentrations were determined by Atomic Absorption Spectrophotometer. Results of the research, All heavy metals were detected in sediment samples with mean concentrations of Cr, Cu, Zn, As, Cd and Pb were range of 18.73-188.00; 16.56-292.60; 87.00-1693.00; 3.96-72.76; 0.18-5.90; 9.87-176.80 mg/kg dry weight, respectively. Besides, the results of potential ecological risk factor show that the risks of heavy metals are in the decreasing order of Cu>Zn>As>Cd>Cr>Pb. |
