Pengaruh Perbandingan Volume Air dan Volume Etanol terhadap Pembentukan Fasa Kristal Kalsium Karbonat Presipitat dengan Metode Pencampuran Larutan

., Sulastria (2019) Pengaruh Perbandingan Volume Air dan Volume Etanol terhadap Pembentukan Fasa Kristal Kalsium Karbonat Presipitat dengan Metode Pencampuran Larutan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengaruh perbandingan volume air dan volume etanol terhadap pembentukan fasa kristal kalsium karbonat diteliti melalui sintesis kalsium karbonat presipitat dengan menggunakan metode pencampuran larutan. Kalsium karbonat disintesis dari batu kapur alam yang diperoleh dari Desa Tuwiri Wetan, Tuban. Larutan CaCl2 dengan penambahan etanol dicampurkan dengan larutan Na2CO3 pada temperatur ruang dengan variasi konsentrasi reaktan sebesar 0,25 Molar, 0,5 Molar dan 0,75 Molar dan variasi rasio volume air dalam larutan CaCl2 terhadap volume etanol sebesar 1/1, 1/3, 1/5. Endapan CaCO3 kemudian disaring, dicuci dan dikeringkan di udara selama 24 jam. Karakterisasi XRD dan SEM dilakukan untuk menganalisis fasa kristal yang terbentuk serta morfologi partikelnya. Hasil penelitian menunjukkan bahwa pembentukan fasa kristal dan morfologinya dipengaruhi oleh konsentrasi reaktan dan rasio volume air terhadap volume etanol. Kenaikan rasio volume air terhadap volume etanol cenderung menurunkan persentase fasa kalsit dan meningkatkan fasa aragonit dan vaterit pada konsentrasi larutan yang lebih tinggi yaitu 0,5 M dan 0,75 M. Terbentuk fasa kalsit, aragonit, dan vaterit pada semua variasi perlakuan dengan morfologi masing-masing yaitu rhombic, needle-like dan spherical.
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The effect of ratio of water and ethanol volume to the formation of calcium carbonate crystalline phase was studied by the synthesis of precipitated calcium carbonate (PCC) using solution route method. PCC was synthesized using limestone taken from Tuwiri Wetan village, Tuban. The CaCl2 solutions with the ethanol addition were mixed with Na2CO3 solution at room temperature. The variation of concentration of reactan are 0,25, 0,5 and 0,75 Molar, while the variation of the ratio of water volume in CaCl2 solution to the ethanol volume are 1/1, 1/3, and 1/5. The resulted powders were filtered, washed and then dried in the air for 24 hours. The XRD characterization was used to analyze the crystalline phase formation, while SEM was used to observe the particles morphology. The results show that variation of concentration of reactan and the ratio of water volume in CaCl2 solution to the ethanol volume affected the phase formation and morphology. Increase in ratio of water volume in CaCl2 solution to the ethanol volume tends to decrease the calcite phase but increase the aragonite and vaterite phase at higher concentration of reactan that is 0,5 and 0,75 Molar. Calcite, aragonite, and vaterite phase are formed at all treatment variation with each morphology are rhombic, needle-like and spherical.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aragonit, Etanol, Kalsit, Kalsium Karbonat Presipitat, Vaterit
Subjects:	Q Science Q Science > QC Physics
Divisions:	Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Sulastria Sulastria
Date Deposited:	20 Jul 2026 03:02
Last Modified:	20 Jul 2026 03:02
URI:	http://repository.its.ac.id/id/eprint/65897

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