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: Pengaruh Natrium Dodesil Sulfat dan Heksadesiltrimetilamonium Bromida terhadap Adsorptivitas Campuran Kaolin-Limbah Padat Tapioka dalam Menjerap Biru Metilena
Abstrak: Adsorption is the most efficient method for removing colourants, but adsorbent modification with surfactant is still rarely performed, surfactant can change the selectivity of adsorbent by modifing its surface charge. Natrium dodecyl sulphate (NDS) and hexadecyltrimethylammonium bromide (HDTMABr) are anionic and cationic surfactant used in this study. Adsorbent (mixture of kaolin-tapioca solid waste) (75:25) were soaked with surfactant (NDS and HDTMA-Br) at concentration 0, 50, 100, 300, and 600% CMC (critical micelle concentration). The result showed that the control adsorbent (0% CMC surfactant) had adsorptivity of 7.50 mg/g. NDS solution could increase the adsorptivity of adsorbent, while the adsorbent immersed in HDTMA-Br decreased the adsorptivity as compared with the control treatment. Isotherm adsorption for methylene blue using the best adsorbent (adsorbent with soaking 600% CMC NDS), followed Freundlich isotherm.
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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