Abstract
In this paper, Fe3O4 magnetism chitosan was made by emulsification crosslinking method. Muyu stone/Magnetism Chitosan Microspheres were prepared by embedding, and then used to photolysis chromium in source water. Based on single factor test, the experimental condition was optimized by quadratic regression orthogonal rotatable composite factorial design. The orthogonal regression model between the removal rate of Cr6+ (y) and microspheres dosage (x1), solution pH value (x2), reaction time (x3) was established as y=88.335+1.380x1+1.468x2+2.217x3-4.465x12-2.556x22-1.266x32+2.363x1x2+4.313x1x3-0.636x2x3. It can be inferred from the model that the removal rate of Cr6+ can reach 93.93% under these conditions of microsphere dosage of 2.444g, pH value of 4.6 and reaction time of 80.4min. Microsphere dosage of 2.444g,pH value of 4.6 and reaction time of 80.4min. Under these conditions, chromium removal rate reaches 93.13%.
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