Pembuatan zeolit sintetis berbahan abu dasar batubara menggunakan metode peleburan alkali hidrotermal telah dilakukan dengan pemberian sonikasi. Sebelum disintesis, kandungan abu dasar batubara diuji dengan XRF. Hasil XRF menunjukkan bahwa abu dasar yang digunakan memiliki kandungan SiO2 sebanyak 57,236% dan Al2O3 sebanyak 33,172%. Abu dasar dan NaOH dilebur dengan perbandingan 1:1,2 g. Sampel yang telah dilebur, dilarutkan dengan larutan NaAlO2, kemudian diberikan pengaruh sonikasi sebelum proses kristalisasi zeolit (hidrotermal). Variasi waktu sonikasi diberikan pada 4 sampel adalah 0,5; 1; 1,5 dan 2 jam serta 1 sampel tanpa sonikasi sebagai perbandingan. Sampel hasil sintesis dicuci dengan aquades hingga mencapai pH 9-10. Karakterisasi sampel yang dilakukan meliputi karakterisasi morfologi permukaan menggunakan SEM dan pengukuran konduktivitas listrik menggunakan LCR-meter. Hasil karakterisasi SEM menunjukkan sampel dengan pemberian ultrasonik memiliki morfologi permukaan yang lebih seragam daripada sampel tanpa pemberian sonikasi. Nilai konduktivitas listrik yang dihasilkan berkisar dari 0,05206 x 10-6 - 2,1188 x 10-6 S/cm dan berada pada rentang bahan semikonduktor. Zeolit dengan pemberian sonikasi selama 1,5 jam mempunyai konduktivitas listrik tertinggi dibandingkan dengan sampel lain. Kata Kunci : sonikasi, sodalit, philipsite, gobbinsite, konduktivitas listrik zeolit
This research aims to analyze the effect of chopping raw material on compost quality and quantity that was made with the biopore infiltration hole method. The composting was done in duplo on the backyard with clay soil type, and the water infiltration rate was 0.3 cm/hour. The holes were made with 10 cm of diameter, 100 cm of depth, and the distance between holes were 50 cm. There were four composition variations on this research i.e 50% yard waste and 50% food waste with and without chopping, 70% food waste and 30% yard waste with and without chopping. The chopping was using an organic waste chopping machine so that the waste size became 0.3-1.5 cm, while the size waste without chopping was ≥ 3 cm. The compost analysis was done toward maturity, compost quality (physical elements and macro elements), and compost quantity. The composting process took 65-80 days to get riped. The best variation was chosen by the scoring method. The result showed that compost with 50% yard waste and 50% food waste was the best variation because the compost quality has met the standard for physical elements and macro elements, it produced more compost quantity. The chopping process could speed up the composting time until 15 days.
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