Synthesis and characterization of natural zeolite with ordered ion imprinted polymer structures (IIP@AFINZ) for selective Cr(VI) adsorption from aqueous solution

In this paper, it is reported for first time about modification of activated natural zeolite from Flores Island Indonesia with ion imprinted polymer (IIP@AFINZ) for selective adsorption of Cr(VI) from aqueous solution. Here, the IIP@AFINZ was prepared by using template ion, complex agent, monomer, cross-linker such as: Cr(VI), 4-Vp, EGDMA, BPO respectively. Polymerization was leading in porogent ethanol: acetone. Several adsorption parameter such as pH effect, mass adsorbent, contact times, temperature and initial sample concentration toward adsorption process of Cr(VI) were also studied. The maximum adsorption capacity for IIP@AFINZ is 6.476 mg/L higher than on the NIP@AFINZ is 3.266 mg/L. The process of adsorption follows pseudo-second-order kinetic model and Langmuir isotherm model. The competitive adsorption studied showed a good performance of IIP@AFINZ to adsorption the Cr(VI) ion from water sample. Moreover, the reusability test for five times Cr(VI) adsorption using IIP@AFINZ showed there was no decrease of adsorption capacity was observed.