Hexavalent chromium was added into raw water to simulate emergent chromium pollution of water source. The reasonable quadratic polynomial model was established and the feasibility of using magnetic ion exchange (MIEX) resin to remove Cr?VI? was investigated by independent variables and response surface tests. The process parameters were also optimized. The results showed that MIEX resin quickly removed Cr?VI?, and the adsorption got equilibrium within 40 min. The removal rate of Cr?VI? increased with increasing of resin dosage and the reducing of Cr(VI) concentration, and reached the maximum at pH 4. The reasonable quadratic polynomial model was established to predict Cr?VI? removal accurately. The interactions of resin dosage and Cr(VI) concentration, resin dosage and pH, Cr(VI) concentration and pH, had significant effects on Cr(VI) removal. The optimal process parameters for Cr?VI? removal onto MIEX resin were obtained, and the maximal removal rate of Cr?VI? was 99.99?.
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