Judul: Behaviour of Composite Membrane Nanopore Cellulosa Acetat-Polistirene (CA-PS) due to Surfactant and Temperature Effect.
Abstrak: Membrane can be used for separation because of its superiority such as simple, simplicity, low energy consumption, and environmentally sound product. The cellulose acetate membrane is an example of the environmentally sound product and is used widely, such as in waste water treatment installation. This is the follow-up of the previous research and focused at the modification of cellulose acetate membrane by polystyrene and cetiltrimetyl ammonium bromide (CTAB) as porogen. The experiment was started with production of cellulose acetate membrane with polystyrene and CTAB with compositions of CA:PS:CTAB of 9:1:0.5, 9:1:1, 9:1:1.5, and 9:1:2. The membranes were formed by molding the mixture into films followed by characterisation of water flux value, rejection index at pressure 20 psi, and analysis of the surface morphology of membrane by scanning electron microscope (SEM). The SEM photo showed that temperature and CTAB affected the amount and the size of pores, and membrane surface textures. Increasing water flux and decreasing rejection index were decreasing with the increasing amount of CTAB. The highest water flux value showed by membrane with CTAB 1.5 % (MCCT 3) membrane at 40 ºC temperature, that was 160.6054 (L/m2.jam). Whereas the highest rejection index was in MCCT 2 at 40 ºC temperature, 9.30 %. The SEM photo showed that MCCT 4 membrane soaked in 40 ºC had pore size of 0.25 μm (250 nm) whereas those soaked in 60 ºC temperature had pore size of 0.50 μm (500 nm). These the membranes were classified as nanofilter
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Judul: Pengembangan Membran Selulosa Asetat Menggunakan Natrium Dodesil Sulfat
Abstrak: Development of membrane technology is waste treatment unit is growing rapidly and widely used in separation process. Membrane technology is chosen because the process is simple, low energy use, nondestructive, and do not generate new waste, thus classified as a green good technology. The production of membrane was started by preparing polymeric mixture solution of cellulose acetate (CA) and sodium dodecyl sulfate (SDS) in acetone. Composition of CA was 15% w/v and composition of SDS were varied from 0; 0.05; 0.01; to 0.125% w/v. The solution was stirred by ultrasonic for 3 hours and casted on the glass plate surface then immersed in warm water at 60 oC. The membranes were characterized by their rejection index. Rejection index was applied to detergent solution with concentration of 1600 ppm. When compared with values below the critical micelle concentration (CMC), the best average value of rejection index was resulted at the initiation of CMC, with SDS concentration of 0.125%. At that concentration, a quite high average values was obtained for the rejection index (77%). While, at the SDS concentration below CMC, 0.05% and 0.01%, the average index rejection values were 17% and 37%, repectively. The best CMC value was reached at the initiation (0.125%).
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Judul: Perdagangan Ilegal Satwa Liar Dilindungi di Indonesia Berdasarkan Data Kasus Selama Tahun 2009 – 2018
Abstrak: Kasus perdagangan satwa liar di Indonesia terjadi karena banyaknya permintaan dari pasar, akses yang mudah untuk mendapatkan sumber daya alam dan melakukan pengiriman, juga karena kurangnya pengawasan dari aparat penegak hukum. Hasil penelitian mengidentifikasi bahwa taksa burung memiliki tingkat tertinggi untuk perdagangan satwa liar (38.03%). Bagian tubuh burung yang paling banyak diperdagangkan adalah paruh sekitar 306 buah, bagian tubuh reptil yang paling banyak diperdagangkan adalah kulit 9 479 lembar, dan bagian tubuh mamalia yang paling banyak diperdagangkan adalah daging beku sebanyak 2 510 kg . Kasus perdagangan satwa liar di Indonesia dari tahun 2009 - 2018 mengalami kenaikan. Kasus terbanyak yang telah diselesaikan adalah di Jawa Timur sebanyak 52 kasus. Banyak pihak seperti organisasi non-pemerintah, BBKSDA, dan KLHK memiliki program penyadartahuan masyarakat mengenai perdagangan satwa liar sehingga masyarakat dapat turut serta mencegah perdagangan satwa liar di Indonesia.
Keyword: kesadaran masyarakat, penegakan hukum, perdagangan satwa liar