Putri, Elsa Desyta (2016) Sintesis Kalsium Karbonat Terendapkan (Precipitated Calcium Carbonate) dari Batuan Kapur Alam Tuban dengan Metode Soda Api. Sarjana thesis, Universitas Brawijaya.
Abstract
Sintesis kalsium karbonat terendapkan telah dilakukan dengan memanfaatkan batuan kapur alam Tuban sebagai bahan dasar. Batu kapur di daerah Tuban, Jawa Timur merupakan mineral alam yang mengandung kalsium cukup tinggi dan keberadaannya melimpah namun nilai jual masih rendah. Batu kapur dapat ditingkatkan kualitasnya melalui sintesis kalsium karbonat terendapkan dengan metode soda api meliputi proses kalsinasi batu kapur, pelarutan CaO hasil kalsinasi dalam HNO3 konsentrasi 2, 4, 6, 8M dan penambahan Na2CO3 konsentrasi 0,25; 0,5; 0,75; 1M dalam filtrat yang dihasilkan untuk mendapatkan endapan kalsium karbonat yang direaksikan selama 60 menit. Dari hasil penelitian diperoleh kalsium karbonat terendapkan berwarna putih dengan rendemen tertinggi sebesar 63,8% pada penambahan HNO3 6M dan Na2CO3 1M. Karakterisasi hasil menggunakan XRF menunjukkan bahwa kandungan Ca dalam kalsium karbonat terendapkan meningkat yaitu sebesar 98,97%. Berdasarkan analisis FT-IR, XRD dan SEM-EDX, kalsium karbonat terendapkan mempunyai bentuk kristal kalsit dan vaterit pada variasi lama pengadukan 30, 60, dan 90 menit. Ukuran partikel ditentukan melalui pengujian PSA dan diketahui bahwa kristal kalsium karbonat terendapkan memiliki ukuran partikel < 100 μm yang terbentuk akibat dari partikel-partikel yang terus tumbuh beragregasi pada larutan yang jenuh.
English Abstract
Synthesis of precipitated calcium carbonate was performed by utilizing Tuban natural limestone as the base material. Limestone in Tuban, East Java is a natural mineral containing calcium is high enough and the existence of abundant but the value of sales is still low. Limestone can be enhanced through the synthesis of precipitated calcium carbonate with caustic soda method includes calcination of limestone, dissolving CaO calcination results in HNO3 concentrations of 2, 4, 6, 8M and the addition of Na2CO3 concentrations of 0.25; 0.5; 0.75; 1M in the resulting filtrate to obtain precipitated calcium carbonate reacted for 60 minutes. From the results obtained by the precipitated of calcium carbonate is white with the highest yield of 63.8% on the addition of 6M HNO3 and 1M Na2CO3. Characterization using XRF results showed that the content of Ca in precipitated calcium carbonate increases in the amount of 98.97%. Based on the analysis of FT-IR, XRD and SEM-EDX, precipitated calcium carbonate has a crystalline form of calcite and vaterit on the variation of reaction time 30, 60, and 90 minutes. The particle size is determined through PSA testing and it is known that the deposition of calcium carbonate crystals have a particle size of <100 μm formed by particles which continue to grow aggregate in the saturated solution.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2016/115/ 051603463 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Kustati |
| Date Deposited: | 14 Apr 2016 11:29 |
| Last Modified: | 20 Mar 2022 12:40 |
| URI: | http://repository.ub.ac.id/id/eprint/154613 |
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