The water samples were acidified with 5 % HNO3 and stored in polyethylene bottles (500 mL) at 4 °C for
analysis of the Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn concentrations.
The water samples were acidified with 5 % HNO3 and stored in polyethylene bottles (500 mL) at 4 °C for
analysis of the Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn concentrations.
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