Adsorption of Indigo Carmine Dye Using Cetyltrimethylammonium Bromide (CTAB) Surfactant Modified Zeolite

Research of indigo carmine dye adsorption using natural zeolite modified by cetyltrimethylammonium bromide (CTAB) surfactant has been done. The purpose of this study was to modify the natural zeolite using CTAB surfactant and to determine its ability on the adsorption of indigo carmine dye. The stages of the study included the activation of zeolites, modifying zeolites using CTAB surfactant and adsorption test of indigo carmine dye. The results showed that the zeolites could be modified by CTAB. They were then characterized by the existence of FTIR absorption band at wavelengths of 1404.18 cm-1 and 2800-3000 cm-1. The various concentration of indigo carmine (5, 10, 15, 20 ppm); contact time (15, 30, 45 minutes) and pH (3, 4, 5, 6, 7, 8, 9) were studied and the highest condition was reached at the 45 minutes, pH= 3 and indigo carmine concentration of 20 ppm for 0.5 and 1 mM CTAB (15.35% and 23%) and indigo carmine concentration of 5 ppm for 10 mM CTAB (96.18%). The adsorption of indigo carmine tended to increase with increasing the concentration and contact time and decreased with increasing the pH

Fabrication Material Zeolite Modified by Fe with Treatment and Without High Energy Milling on Zeolite Materials

Natural zeolite in Indonesia are generally found in bulk form and many impurities. The purpose of this research was obtaining iron modified zeolite with and without High Energy Milling treatment on zeolite material. Zeolite material was done by milling using a High Energy Milling and modifications were done by soaking in a solution of iron (Fe). Natural zeolites was sifted and then milling by HEM, activation and Fe modification. Characterization of iron modified zeolites were done using SEM-EDX, BET and XRD. SEM analysis showed that the surface morphology of ZmA-Fe was elliptical agglomerated and ZA-Fe was elliptical. EDX showed that the percentage of Fe atom increased in ZmA-Fe and ZA-Fe against natural zeolite respectively by 566.67% and 333.33%. BET analysis of the ZmA-Fe to ZA-Fe showed the specific surface area decreased difference of 15%, the pore volume increased difference of 13.44%, and the average pore size increased difference of 30.48%. XRD analysis as well as provided information about crystallinity ZmA-Fe and ZA-Fe did not differ significantly from the natural zeolite. Based on the analysis results indicated that the Fe which has been modified into the zeolite with and without treatment by High Energy Milling on a zeolite material

Pengaruh Pelarut pada Rendemen Sintesis Senyawa Kompleks Bis-Asetilasetonatotembaga(II)

Telah dilakukan penelitian tentang pengaruh pelarut pada rendemen sintesis senyawa kompleks bis-asetilasetonatotembaga(II). Tujuan penelitian ini adalah untuk mensintesis senyawa kompleks bis-asetilasetonatotembaga(II) dengan pelarut metanol, aseton, dan kloroform, menentukan pelarut terbaik untuk sintesis dan membandingkan rendemen hasil sintesis pada pelarut yang berbeda. Senyawa kompleks bis-[Cu(acac)2] disintesis dengan mencampurkan CuSO4.5H2O dan ligan asetilaseton dalam pelarut metanol, aseton dan kloroform. Hasil yang diperoleh berupa endapan berwarna biru. Hasil analisis UV-Vis menunjukkan bahwa senyawa bis-[Cu(acac)2] dalam beberapa pelarut mempunyai panjang gelombang 654-657 nm. Hasil analisis FTIR menunjukkan adanya atom O dari ligan asetilaseton terkoordinasi dengan atom pusat Cu(II) pada bilangan gelombang 455,2 cm-1. Rendemen senyawa kompleks paling banyak diperoleh pada senyawa kompleks bis-[Cu(acac)2] dalam pelarut aseton yaitu sebesar 2,50 gram

Modification Effect of Carbon Nanotubes by LiCl (CNTs/LiCl) on the Electrical Conductivity Character

Carbon nanotubes have been modified by mass percentage variation of LiCl using reflux method. Mass percentage variation used in this study was 0, 1, 5, and 15%. The purpose of this study was to determine the effect of LiCl dope on the electrical conductivity of carbon nanotubes. This research was used reflux method by heating at 80°C for 24 h. The products produced were in the form of CNTs / LiCl dry powders. The characterization results of FT-IR spectroscopy showed that there was a Li-O bond group in the addition of 1, 5, and 15% LiCl while XRD characterization results did not show any diffraction of lithium chloride. The results of this study showed an increase in electrical conductivity at 15% addition of LiCl which was of 2.69 x 10-3 S/m. Electrical conductivity in the addition of 1% and 5% LiCl decreased (1.17 x 10-6 S/m and 2.64 x 10-6 S/m) from CNTs/LiCl 0% (3.68 x 10-6 S/m) due to the influence of the PVA high resistivity used as an adhesive in the pellets fabrication

Pembuatan Komposit Carbon Nanotube-polyvinyl Alcohol (Cnt-pva) Serta Evaluasi Sifat Mekaniknya

Perkembangan teknologi nanomaterial mendukung teknologi komposit. Komposit yang menggunakannanomaterial menghasilkan sifat mekanik yang lebih baik daripada komposit biasa. Komposit carbon nanotubes(CNT) berpotensi memiliki kekuatan tarik yang tinggi oleh adanya struktur tabung nanonya yang baik sebagaimatrik. Komposit CNT-PVA telah dibuat dengan metode pelarutan. Polyvinyl alcohol (PVA) dilarutkan dalam airbertemperatur 80°C, selanjutnya material CNT ditambahkan ke dalam larutan tersebut dengan variasi fraksi massaCNT terhadap PVA sebesar 10%, 20% dan 30%. Komposit CNT-PVA terbentuk setelah dikeringkan padatemperatur 80°C. Selanjutnya sifat mekanik komposit dikarakterisasi dengan uji kekuatan tarik. Hasil ujimenunjukkan bahwa komposit CNT-PVA dengan fraksi massa 20% CNT terhadap PVA menghasilkan modulusYoung yang paling besar yaitu 137,71MPa. Ketebalan komposit 0,94 mm yang dibangun oleh tiga lapis tipiskomposit CNT-PVA menghasilkan peningkatan modulus Young hingga 107,30%

Perencanaan Struktur Gedung Hotel Persona Jakarta

Persona Hotel located on the main route from Bekasi to Jakarta, in area Jatiwaringin 60. Hotel Persona will be built vertically with the number five floors consisting of four floors and a roof floor.Building structure designed use Special Moment Resisting Frame System based on Concrete requirements for structural building Codes (SNI 2847-2013) Analysis of seismic loading was conducted using equivalent static method based on Indonesian Earthquake Resistant Building Codes (SNI 03-1726-2012). In designing this building structure, we used the concept of capacity design. The purpose of this concept was to provide enough ductility by designing plastic hinges on beam. In order to guarantee plastic hinges are formed on the beams, the columns should be designed to be stronger than the beams (Strong Column Weak Beam). The foundation was designed as bored pile, because the soil in that area was hard soil type. The results of the structural analysis show that the Hotel Building structure was able to withstand the designed earthquake loading

SINTESIS POROUS CARBON BERBAHAN DASAR MOLASE DENGAN PENAMBAHAN KATION NON LOGAM

ABSTRAK Telah dilakukan penelitian untuk mensintesis porous carbon dari molase dengan kation non logam. Variasi waktu karbonasi dan jenis asam dilakukan untuk mendapatkan produk sintesis yang paling optimum. Variasi massa molase yang digunakan adalah 15; 17,5; dan 20 g, sedangkan variasi jenis asam yaitu, asam sulfat, asam fosfat, dan asam klorida. Campuran dipanaskan 100º C selama 6 jam selanjutnya dicuci hingga pH netral sebelum pemanasan 160º C selama 3 jam. Karbonasi dilakukan pada 900º C selama 2, 4, dan 6 jam. Produk sintesis dianalisis menggunakan SEM dan BET. Hasil penelitian menunjukkan porous carbon berbentuk sperik dengan ukuran pori 1,3 nm serta waktu karbonasi yang optimum adalah 4 jam. Penggunaan asam sulfat menghasilkan morfologi relatif seragam dibanding asam yang lain karena memiliki ukuran partikel 0,2 hingga 1,5 µm dengan ukuran rata-rata 1,1 µm. Pada asam fosfat diperoleh massa produk relatif paling banyak yaitu 1,703 g, sedangkan dengan asam klorida dihasilkan porous carbon dengan ukuran pori paling kecil (1,3077 nm) dengan luas permukaan spesifik (379,851 m2/g) serta volume pori yang besar (0,169 cc/g). Kata kunci: porous carbon, molase, kation non logam, dan karbonas

Pengaruh Aktivasi Zeolit Dengan Kmno4 , K2s2o8 Dan H2so4 Terhadap Adsorpsifitas Ion Na+ Dan Mg2+ Diujikan Pada Air Tanah Karimunjawa Blok I

---Telah dilakukan penelitian untuk mengaktivasi zeolit alam menggunakan H2SO4, KMnO4 dan K2S2O8 untuk mengadsorpsi ion Na+ dan Mg2+ dalam air tanah Karimunjawa Blok I. Perlakuan meliputi proses refluks dalam campuran H2SO4-KMnO4 atau H2SO4-K2S2O8 pada suhu 80 ºC selama 5 jam, dilanjutkan pencucian sampai pH mendekati netral dan pengeringan pada suhu 80 ºC selama 12 jam. Hasil penelitian menunjukkan aktivasi dengan H2SO4-KMnO4 meningkatkan rasio Si/Al dari 5,46 menjadi 7,84, luas permukaan, volume dan ukuran pori. Sedangkan dengan H2SO4-K2S2O8 meningkatkan rasio Si/Al menjadi 6,38, luas permukaan dan volume pori sebaliknya ukuran pori mengalami penurunan. Zeolit aktivasi dengan H2SO4-KMnO4 mempunyai daya adsorpsi terhadap ion Na+ dan Mg2+ paling besar dibanding dengan zeolit aktivasi dengan H2SO4-K2S2O8 dan zeolit alam. Persentase penurunan ion Na+ berturut-turut 80,38%, 54,24% dan 31,28% dari kadar Na+ mula-mula 784,74 ppm sedangkan ion Mg2+ berturut turut 22,47%, 17,05% dan 15,93% dari kadar Mg2+ mula-mula 477,19 ppm.Kata kunci: aktivasi zeolit, ion Na+ dan Mg+, karimunjawa SUMMARY---It has been done a research to activate natural zeolite with H2SO4, KMnO4 and K2S2O8 to adsorp Na+ and Mg2+ ions in groundwater of Karimunjawa Block I. The treatments of natural zeolite included refluk process in mixture of H2SO4-KMnO4 or H2SO4-K2S2O8 at 80 ºC for 5 hours, and then continued cleaning until neutral pH and dried at 80 ºC for 12 hours. The result showed that activation using H2SO4-KMnO4 increased Si/Al ratio from 5.46 to 7.84, surface area, total pore volume, and average of pore radius. While using H2SO4-K2S2O8 increased Si/Al ratio to 6.38, surface area, and total pore volume otherwise the average of poreradius decreased. Adsorption Na+ and Mg2+ ions of activated zeolite by H2SO4-KMnO4 was highest compared tothe activated zeolite by H2SO4-K2S2O8 and natural zeolite. The decreasing of precentage of Na+ ions were 80.38%, 54.24% and 31.28% from the first concentration 784.74 ppm since Mg2+ ions were 22.47%, 17.05% and 15.93% from the first concentration 477.19 ppm