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The effectiveness of a magnetic ion exchange resin (MIEX) for the treatment of Hongze Lake water in China was evaluated.The kinetics of natural organic matter (NOM) removal at various MIEX doses and contact time,multiple-loading experiments,impacts of MIEX prior to coagulation on coagulant demands and the effectiveness of combination of MIEX,pre-chlorination and coagulation were investigated.Kinetic experimental results show that more than 80% UV254 and 67% dissolved organic carbon (DOC) from raw water can be removed by the use of MIEX alone.94% sulfate,69% nitrate and 98% bromide removals are obtained after the first use of MIEX in multiple-loading experiments.It is suggested that MIEX can be loaded up to 1 250 bed volume (BV,volume ratio of tested water to resin) or more without saturation when regarding organics removal as a target.MIEX can remove organics to a greater extend than coagulation and lower the coagulant demand when combining with coagulation.Chlorination experimental results show that MIEX can remove 57% chlorine demand and 77% trihalomethane formation potential (THMFP) for raw water.Pre-chlorination followed by MIEX and coagulation can give additional organic and THMFP removals.The results suggest that MIEX provides a new method to solve the problem algae reproduction.