Pengaruh Air Laut Terhadap Sifat Listrik Zeolit Sintetis dari Bottom Ash Melalui Proses Alkali Hidrotermal
DOI:
https://doi.org/10.25077/jif.7.1.19-27.2015Abstract
Telah dilakukan sintesis zeolit berbahan dasar bottom ash dan NaOH sebagai aktivator dengan perbandingan 1 : 1,2 g. Sebagai media kristalisasi dalam proses pembentukan kristal zeolit, digunakan air laut dan akuades melalui proses alkali hidrotermal. Proses alkali hidrotermal dilakukan menggunakan teflon autoclave yang dipanaskan di dalam oven pada temperatur 100oC selama 6 jam. Zeolit sintetis yang didapatkan kemudian diuji secara kualitatif dan kuantitatif dengan menggunakan XRD dan SEM-EDS serta penentuan konduktivitas listrik menggunakan LCR-meter model TH2820. Hasil analisis pola XRD menunjukkan bahwa sampel mengandung zeolit Na-X, zeolit Na-P, hidroksisodalit, dan kuarsa. Hasil SEM-EDS memperlihatkan pengaruh perbedaan media kristalisasi terhadap permukaan zeolit yang dihasilkan. Zeolit dengan kemurnian yang baik berbentuk kubik didapatkan pada sampel yang menggunakan media kristalisasi air laut dari tepi pantai dengan kadar kuarsa yang lebih rendah. Dari nilai konduktivitas listriknya diketahui bahwa sampel berada dalam rentang bahan semikonduktor. Nilai dengan konduktivitas listrik tertinggi terdapat pada sampel yang menggunakan media kristalisasi air laut di tepi pantai dengan nilai konduktivitas 1,287 x 10-6 - 3,040 x 10-6  S/cm.
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