Judul: Adsorptivity of kaolin-tapioca solid waste mixture of adsorbent modified with Heksadesiltrimetilamonium bromida surfactant and tween 80 toward cibacron red
Abstrak: Metode adsorpsi merupakan metode penanggulangan limbah yang banyak digunakan. Salah satu faktor yang menentukan kapasitas dan selektivitas adsorpsi suatu adsorben adalah muatan permukaan. Dalam penelitian ini, muatan permukaan adsorben kaolin-limbah padat tapioka dimodifikasi dengan penambahan surfaktan. Surfaktan yang digunakan pada penelitian ini adalah surfaktan kationik (HDTMA-Br) dan nonionik (Tween 80). Adsorben campuran kaolin-limbah padat tapioka (75:25) direndam dengan surfaktan pada tingkat konsentrasi misel kritis (KMK) 0, 50, 100, 300, dan 600%. Adsorben campuran dilakukan perlakuan tanpa dan dengan pencucian ulang. Larutan HDTMA-Br yang digunakan terbukti nyata dapat menaikkan kapasitas penjerapan adsorben, sedangkan adsorben dengan perendaman Tween 80 mengalami penurunan terhadap kapasitas adsorpsi adsorben. Model isoterm adsorpsi adsorben limbahpadat tapioka termodifikasi surfaktan terhadap cibacron red dengan perendaman 600% KMK HDTMA-Br tanpa pencucian ulang mengikuti persamaan isoterm Langmuir.
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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: Studi Seroprevalensi Newcastle Disease pada Unggas Peliharaan Masyarakat di Kecamatan Lore Utara Kabupaten Poso.
Abstrak: This research aims to determine the seroprevalence of Newcastle Disease (ND) on native birds in North Lore Poso District. The research used serum samples from unvaccinated native birds. A total of 45 samples; 22 from domestic chicken and 23 from Muscovy ducks; were taken from Sedoa, Wuasa, and Napu village. Newcastle Disease was determined by Enzyme-linked Immunosorbent Assay (ELISA) method. The seroprevalence of ND in domestic chicken and muscovy ducks were 40.9% and 69.56%, respectively. It was equal with 9 domestic chicken and 13 muscovy ducks that were positive antibody ND. Based on the results, we can conclude that ND virus was present on those three village in North Lore. The area was determined as ND-endemic.
Keyword: ELISA, Newcastle Disease, Poso, Seroprevalence