CD Skripsi
Sintesis Zeolit A Dari Abu Layang Cangkang Kelapa Sawit Dengan Metode Alkali Fusi Hidrotermal Dan Uji Adsorptivitas Terhadap Ion Timbal(Ii)
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SUMMARY
Fly ash is one of the by-products of the palm oil mill. Fly ash contains silica which can be used as a raw material for synthesis of zeolite. The purpose 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 in solution. The synthesis of zeolite A was carried out using the alkaline hydrothermal fusion method with the Si/Al ratio of 1.25 and the variation of the hydrothermal time used (4; 6 and 8 hours). The synthesized zeolite A was applied to adsorb lead(II) ions with several variations of the adsorbent doses. The zeolite characterization was carried out by XRF, XRD and FTIR analysis. XRF analysis was to determine the content of silica and alumina. XRD analysis was to determine the crystallinity of the synthesized zeolite and the crystal size based on the Debye Scherrer. The FTIR analysis was used to analyze the vibrational mode of zeolite. The concentration of lead(II) ions was analyzed with an AAS instrument. XRD analysis indicated that the zeolite contained the mixture of gibbsite and zeolite A, with a crystal size of zeolite A in 6 hours is 25.03 nm with a crystallinity of 94.66%. and a crystal size of zeolite A in 8 hours is 35.88 nm with a crystallinity of 86.05%. The results of the FTIR analysis showed that all as synthesized zeolite contained O-Si-O groups, T-O strain asymmetry and double rings. The AAS results obtained the optimum of the zeolite dose for lead(II) ion adsorption was 0.2 gram with an adsorption capacity of 22.9025 mg/g and an adsorption efficiency of 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.
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