Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
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@article{JKSA19122, author = {Nanik Sulistyowati and Sriyanti Sriyanti and Adi Darmawan}, title = {Effect of Acid on Natural Zeolite Dealumination on Indigo Carmine Adsorption Capability}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {21}, number = {2}, year = {2018}, keywords = {zeolite; dealumination; H2SO4; HCl; adsorption; indigo carmine}, abstract = {Modifying natural zeolite with dealumination using H 2 SO 4 and HCl, and its application to adsorb indigo carmine has been performed. Dealumination was carried out by reacting a natural zeolite with a mixture of KMnO 4 -H 2 SO 4 and a mixture of KMnO 4 -HCl then refluxed for 5 hours followed by washing with demineralized water until a neutral pH was obtained and dried for 12 hours at 80°C. Dealuminated zeolites were then characterized by XRD, FTIR and Si/Al ratio measurements. Dealuminated zeolite was then used to adsorb indigo carmine in a batch-shaker system for 30 min with concentration variation XRD diffraction shows that natural zeolite and dealuminated zeolite contain modernit minerals. Dealumination increased the Si/Al ratio from 0.935 to 2.075 and 7.912 which meant that dealumination was successful. The indigo carmine adsorption result showed that zeolite adsorption capacity II> zeolite I> natural zeolite. FTIR data showed that there was no change of zeolite structure before and after adsorption}, issn = {2597-9914}, pages = {102--106} doi = {10.14710/jksa.21.2.102-106}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/19122} }
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