Rizqienggal, Nicko (2019) Pengaruh Driving Force pada Metoda Pemisahan Menggunakan Membran Terhadap Laju Difusi NaCl dan MgCl2. Sarjana thesis, Universitas Brawijaya.
Abstract
Adanya pengotor dalam garam NaCl memerlukan teknik pemurnian yang sesuai agar diperoleh kemurnian tinggi setara dengan garam industri. Salah satu cara pemisahan adalah menggunakan membran. Penelitian ini bertujuan untuk membandingkan dua metoda pemisahan, yaitu mikrofiltrasi dan dialisis, yang memiliki driving force berbeda serta mengetahui pengaruh konsentrasi larutan umpan pada dialisis terhadap jumlah garam MgCl2 yang tertahan dalam fasa konsentrat. Pemisahan dilakukan menggunakan membran selulosa ester komersial dengan sampel larutan garam NaCl 40000ppm dan MgCl2 5000ppm. Selanjutnya dialisis juga dilakukan untuk variasi konsentrasi larutan NaCl dan MgCl2 tetapi pada perbandingan tetap yaitu 8 : 1. Selama percobaan berlangsung, laju difusi diamati berdasarkan perubahan daya hantar pada fasa umpan maupun dialisat. Kemudian, konsentrasi kedua jenis garam dianalisis secara volumetri. Berdasarkan hasil analisis, metode pemisahan garam NaCl dan MgCl2 secara dialisis memberikan hasil yang lebih baik dibandingkan dengan metode mikrofiltrasi. Di samping itu, untuk pemisahan secara dialisis diperoleh bahwa semakin tinggi konsentrasi larutan garam pada fasa umpan maka selektivitas membran dan laju difusi garam semakin besar. Adapun hasil analisis kuantitatif menunjukkan bahwa pemisahan yang cepat pada mikrofiltrasi dengan ukuran pori membran yang cukup besar menyebabkan membran hanya mampu menahan MgCl2 sebesar 10% dengan nilai selektivitas terhadap garam NaCl sebesar 8,02. Sementara itu, pemisahan secara dialisis mampu menahan MgCl2 hingga 88,26% dengan selektivitas sebesar 24,81.
English Abstract
The presence of impurities in NaCl salts requires an appropriate purification technique to obtain an industrial high purity salt, one of them is to use a membrane. This research aim was to compare two methods of separation, namely microfiltration and dialysis, which have a different driving force, for separating NaCl and MgCl2 salts. Moreover, it was also to determine the impact of feed concentration on dialysis toward the amount of retained MgCl2 salts in the phase of concentrate. The separation using a commercial cellulose ester membrane on NaCl solution of 40000ppm and 5000 ppm of MgCl2 has been carried out. Furthermore, the dialysis in a vary of NaCl dan MgCl2 concentrations solutions at a fixed ratio of 8:1, has also been done. During the experiment, the diffusion rate based on changes in the conductivity of feed and dialysate phase has been observed, afterward the salt concentration was analyzed volumetrically. Based on the obtained analysis, it was found that comparing to the separation of NaCl and MgCl2 through dialysis was better than microfiltration. In addition, it showed that the increasing of salt concentration of feed phase in dialysis methods resulted in higher diffusion rate and its selectivity. Furthermore, due to the rapid separation and large membrane pore size of microfiltration methods, quantitative analysis obtained showed that the membrane could only retain 10% of MgCl2 at selectivity against NaCl salts of 8.02. Meanwhile, using dialysis the retained MgCl2 of 88.26% and its selectivity of 24.81 has been reached.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2019/208/051910932 |
| Uncontrolled Keywords: | Mikrofiltrasi, dialisis, membran selulosa ester, garam, Microfiltration, Dialysis, Celulose ester membrane, salt |
| Subjects: | 500 Natural sciences and mathematics > 542 Techniques, procedures, apparatus, equipment, materials > 542.6 Filtering and dialysis |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 10 Aug 2020 07:36 |
| Last Modified: | 10 Aug 2020 07:36 |
| URI: | http://repository.ub.ac.id/id/eprint/178816 |
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