Preparation of Ion-exchange Resin of Styrene-type and the Effect Evaluation About Reducing Guyuan City Tap Water Hardness

The copolymer beads body of the styrene and divinyl benzene is prepared by the suspension polymerization of styrene as the polymerizable monomer and divinyl benzene as a comonomer,and then is sulfonated into the cation exchange resin by the concentrated sulfuric acid.FTIR indicated that the cation exchange resin has been made successfully.Test method that a NaOH standard solution titrated the NaCl solution in ion exchange resin is made to determinate the size of the exchange capacity,which is 4.50(mmol/g).Guyuan City tap water as the research object is softened by the prepared cation exchange resin of styrene-type.EDTA(ethylenediamine tetraacetic acid disodium salt) titration method is used to measure the tap water change in hardness before and after cation exchange resin is soaked.The results showed that the prepared ion-exchange resin have a good exchange performance and greatly reduced hardness of Guyuan City tap water.