Judul: Adsorben berbasis limbah padat tapioka
Abstrak: The use of agroindustrial waste and clay mineral have been studied as alternative adsorbents for dyes, such as cibacron blue. In this research, tapioca solid waste, kaolin, bentonite, and the mixture of tapioca solid waste and kaolinite or bentonite were used as adsorbents for cibacron blue. Acid and base treatments were carried out to activate the adsorbents. Adsorption was varied with adsorption times and adsorbent weight. The result showed that acid activated tapioca solid waste had the highest adsorption capacity. The optimum adsorption time and adsorbent tapioca solid waste weight was 75 minutes and 1 g. The cibacron blue concentration decrease from 50 mg/L to 11.12 mg/L. On the other hand, the optimum condition for commercially activated carbon were 30 minutes and 0.5 g with concentration decreasing from 50 mg/L to 19.44 mg/L. The adsorption capacity for acid activated tapioca solid waste and activated carbon were 1.94 mg/g and 3.05 mg/g adsorbent respectively. With adsorption efficiency were 77.75% and 61.11%. Acid activated tapioca solid waste were followed Freundlich isotherm.
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Judul: Adsorpsi Cibacron Red Menggunakan Campuran Kaolin Ampas Tebu dan Bentonit-Ampas Tebu
Abstrak: The use of agroindustrial waste and clay mineral have been studied as alternative adsorbents for dyes, such as Cibacron Red. Cibacron Red is one of reactive dyes which is widely used in textile industries In this research, the mixture of sugarcane bagasse and kaolinite or bentonite were used as adsorbents for cibacron red. Acid and base treatments were carried out to activate the adsorbents. Adsorption was carried out by varying adsorption times and adsorbent weights. The result showed that acid activated bagasse had the highest adsorption capacity. The optimum adsorption time and adsorbent weight were 120 minutes and 1 g with decrease of concentration from 50 mg/L to 7.99 mg/L. On the other hand, the optimum conditions for commercially activated carbon were 90 minutes and 1 g with decrease of concentration from 50 mg/L to 16.18 mg/L. The adsorption capacity and efficiency for acid activated bagasse was better than the commercially activated carbon. The adsorption capacity for acid activated bagasse and activated carbon were 2.10 mg/g and 1.69 mg/g adsorbent. The adsorption efficiency were 84.00% and 67.64%. Acid activated bagasse were followed Freundlich and Langmuir isotherm type, it was mean that adsorbent type is fisisorption and chemisorption.
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Judul: Infectious laryngo tracheitis pada unggas
Abstrak: Infectious Laryngo Tracheitis merupakan penyakit pada unggas yang disebabkan oleh virus yang mempunyai sasaran saluran pernapasan bagian atas Penyebab penyakit Infectious Laryngo Tracheitis Univers (ILT) adalah virus yang termasuk kelompok virus Herpes sering disebut Tarpeia avium. Virus tersebut tersusun dari inti asam deoksi ribonukleat yang dilengkapi dengan pembung- kus yang merupakan derivat dari lemak serta mempunyai garis tengah antara 195-250 nano meter. Pada temperatur kamar virus tersebut dapat bertahan selama 15 hari dalam keadaan tanpa pengawetan. Virus penyebab Infectious Laryngo Tracheitis mempunyai kepekaan terhadap zat kimia golongan pelarut lemak seperti: phenol dan kresol. Induk semang definitip penyakit Infectious Laryngo Tracheitis adalah ayam, tetapi burung merak, itik dan kalkun pernah dilaporkan dapat terinfeksi. Mammalia dan golongan rodensia merupakan hewan yang tahan terhadap infeksi penyakit ini. Pada manusia penyakit Infectious Laryngo Tracheitis diduga mempunyai hubungan dengan timbulnya gangguan neuralgia yang bersifat sub-akut akibat infeksi virus Herpes jenis lain yang disebut virus Sub-acute Myelo Optico Neuropathi (virus SMON).
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