KHẢO SÁT SỰ HẤP PHỤ Asen CỦA VẬT LIỆU γ – Al2O3 – SDS – APDC VÀ ỨNG DỤNG TRONG KỸ THUẬT CHIẾT PHA RẮN NHẰM XÁC ĐỊNH As(III) TRONG CÁC MẪU NƯỚC

Tóm tắt

In this research, we present the results of investigating in arsenic adsorption of γ - Al2O3 - SDS - APDC material in water sample in static and dynamic conditions. It is indicated that with pH = 3 and reaction time being 6h, the material has maximum adsorption capacity qmax = 13,5 (mg/g) in adsorption equilibrium while the material almost does not adsorb As(V) in the same pH. The results also show that separation column can separate As(III) from solution containing As(V) effectively. The optimal conditions for separation is that sample pumping speed is 2ml/min, concentration of HCl 3M with volume of 15ml, eluting speed 2ml/min. The effects of some metal ions such as Cu2+, Fe3+, Hg2+, Pb2+ was investigated. The concentration of these metals being 100 times higher than that of As can affect arsenic separation. As(V) will affect to separation process when its concentration is at least 100 times higher than that of As(III).