The interaction between trace metal ions and the widespread calcium carbonate minerals is often found in nature and influence the distribution of the ions in the aquatic environment as well as the reactivity of the minerals. Last years, ion exchange resins were intensively used in the removal of inorganic matters in water and wastewater. The retention of metal cations could occur by ion exchange – using cation exchangers or strong base anion exchangers, if the metal cations are as complex anions or there are conditions to form these anions – and chelating processes, when ion exchangers contain into their functional groups one or more electron-donor elements. Therefore, some new sorbents were obtained by CaCO3 mineralization from supersaturated solutions on insoluble templates based on divinylbenzene; ethylacrylate; acrylonitrile cross-linked copolymer functionalized with weak acid, basic, or amphoteric functional groups. The composite beads were tested as sorbents for different ionic molecules (heavy metal ions or dyes) [1,2]. SEM images and photos after different dyes sorption on beads, before and after CaCO3 growth The sorption results are influenced by: (1) the polymeric matrix capacity for ionic molecules sorption, (2) the availability of functional groups after CaCO3 growth, (3) the distribution of CaCO3 crystals on/onto beads, (4) the capacity of crystals to interact with ionic molecules as a function of their arrangement on/onto beads.