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Sri Aprilia
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Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGOLAHAN AIR GAMBUT/RAWA DENGAN PROSES KOAGULASI-MEMBRAN ULTRAFILTRASI Sri Aprilia
Purifikasi Vol 12 No 3 (2011): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v12.i3.79

Abstract

Warna air pada air gambut/rawa timbul karena senyawa-senyawa asam humus berikatan dengan ion logam di dalam air. Air berwarna yang mengandung senyawa non ionic tidak dapat dihilangkan dengan cara koagulasi. Untuk menghilangkan zat warna pada air rawa/gambut digunakan membran selulosa secara ultrafiltrasi. Membran selulosa asetat dibuat 6 variasi. Membran konsentrasi 10% menghasilkan Lp yang besar. Analisa SEM menunjukkan distribusi pori yang homogen dan bentuk pori adalah sponge. MWCO membran diperoleh pada berat molekul dekstran di atas 30000 Dalton. Air sungai dilakukan proses koagulasi diperoleh kondisi optimum pada pH 8 dan konsentrasi koagulan 40 ppm. Proses Membran disertakan koagulasi dapat mengurangi zat warna sekitar 80%, sedangkan tanpa koagulasi sekitar 30%. Fluks permeat tinggi pada air sungai dengan koagulasi. Membran yang baik dari segi fluks yang tinggi diperoleh pada membran M10T30. Penyisihan warna pada semua membran menunjukkan hasil yang signifikan.
Karakteristik Membran Selulosa Triasetat Yang Diprepasi Secara Inversi Fasa Presipitasi Imersi Sofyana Sofyana; Sri Aprilia; Mulkus Assaki
Jurnal Inovasi Ramah Lingkungan Vol 1, No 1 (2020): Jurnal Inovasi Ramah Lingkungan
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.638 KB)

Abstract

Phase inversion is the most versatile technique which to prepare membranes that is microfiltration, ultrafiltration, nanofiltration and reverse osmosis. In the phase inversion technique in immersion precipitation, the membrane structure formed is affected by the type of solvent and the membrane structure will affect the performance. During the process of precipitation homogeneous polymer will form a solid comprising two parts of a non-porous dense layers layer forming a dense layer on the membrane surface and a porous structure forming a support layer at the    bottom in this case an asymmetric structure formed membrane. This research was conducted in 2 stages of activity. First membrane manufacturing process with phase inversion method of cellulose triacetate 18% concentration,dimentyl sulfoxide solvent 82%, 75 oC anneling temperature and 1 minute evaporation time. The changing variables are the operating pressure of 1, 2, 3, 4, 5, 6, 7 bar, the composition of the solvent (dimentyl sulfoxide): solvent (Water) = (0 : 10) is referred to as the M1 membrane and (2 : 8 ) is referred to as the M2 membrane. Membranes that have been made in the characteristics of permeability values and cloud point. The result showed that membrane M1 has permeability value 2,0588 L / m.h.bar, M2 membrane has permeability value 0,9009 L/m2.h.bar. Cloud point point was reached in dope solution with coagulation bath 0: 10 after addition of solvent: non-solvent which is 1,870 gram, while point cloud point at dope solution with 2: 8 coagulation tube was reached in addition of solvent: non-solvent is 6,602 gram.
Co-Authors Devianti Devianti Mulkus Assaki Ramayanty Bulan Ratna Ratna Sofyana Sofyana