Saputra, Elias2023-04-172023-04-172023-01PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/10934The aim of this study was to determine the characteristics of the synthesized zeolite A with variations in hydrothermal time and to determine the ability of the synthesized zeolite A to adsorb lead(II) ions. The synthesis of zeolite A was carried out using the alkaline hydrothermal fusion method with a Si/Al ratio of 1.25 and a variation of the hydrothermal time used for 4; 6 and 8 hours. The synthesized zeolite A was applied to adsorb lead(II) ions with several variations of adsorbent doses. Zeolite characterization was carried out by FTIR analysis. FTIR analysis to determine the functional groups of zeolite. The concentration of lead(II) ions was analyzed with an AAS instrument. The results of the FTIR analysis showed that all the synthesized zeolite products had O-Si-O groups, T-O strain asymmetry and double rings. The AAS results obtained the optimum adsorbent dose of the synthesized zeolite used to adsorb lead(II) ions at a dose of 0.2 gram with an adsorption capacity and adsorption efficiency of 22.9025 mg/g and 96.38%, respectively. Based on these results, it was concluded that zeolite A synthesized from oil palm shell fly ash has the potential as an adsorbent in adsorbing lead(II) ions.enfly ashhydrothermallead(II) ionszeoliteArticle