Nano-zero-valent iron(nZVI) particles were synthesized by microemulsion method. Chitosan and polyacrylic acidstyrene(PAA-b-PS) as the shell were used prepare the chitosan/PAA-b-PS double-embedded nano-zero iron particles(CSPAA-b-PS-Fe) by the off-site method; CS-PAA-b-PS-Fe material characterized by TEM and XRD
and be used to remove Cr(Ⅵ) in water. Characterization results show that CS-PAA-b-PS-Fe has a core-shell structure
which can effectively prevent the agglomeration of nZVI. The experimental results show that: the optimal mass concentration ratio of CS-PAA-b-PS-Fe for reducing Cr(Ⅵ) is 0.2∶1∶1; Under the conditions of Cr(Ⅵ) mass concentration 100 mg/L
CS-PAA-b-PS-Fe dosage 0.1 g/L and reaction time 100 min to reach equilibrium