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Rahmat Eko Sanjaya
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INDONESIA
Jurnal Ilmiah Berkala Sains dan Terapan Kimia
Published by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Ilmiah Berkala Sains dan Terapan Kimia is a peer-reviewed and open-access scientific journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat. The journal publishes high-quality original research articles, review articles, and short communications in chemistry and applied chemical sciences. The journal welcomes manuscripts in the following areas: Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Analytical Chemistry, Biochemistry, Environmental Chemistry, Natural Product Chemistry, Materials and Polymer Chemistry, Computational and Molecular Chemistry, Theoretical Chemistry, and Applied Chemistry. The journal is published biannually in January and July.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 6 Documents
 1 
Search results for , issue "vol 11, no 2 (2017)" : 6 Documents clear
PEMBUATAN DAN KARAKTERISASI MEMBRAN KERAMIK DENGAN VARIASI TEPUNG BERAS SEBAGAI ADITIF UNTUK PROSES MIKROFILTRASI Iman Rahayu
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.947 KB) | DOI: 10.20527/jstk.v11i2.4035

Abstract

Membran keramik merupakan membran sintetik dan bagian dari membran anorganik. Aplikasi mengenai membran ini telah banyak dikembangkan, seperti untuk proses pemisahan gas dan juga pada proses mikrofiltrasi yang digunakan untuk proses penjernihan air. Bahan-bahan yang digunakan untuk proses pembuatan membran keramik adalah kaolin, tanah liat, felspar, pasir kuarsa dan tepung beras yang digunakan sebagai zat pembentuk pori dengan variasi tiga komposisi. Proses pembuatan keramik menggunakan proses cetak tekan dengan suhu pembakaran sampai 1300°C selama 9 jam. Nilai fluks yang dihasilkan dari membran M25%, M35% dan M45% adalah 2440-2520 L/atm.jam.m2, 1680-1760 L/atm.jam.m2, dan 3660 L/atm.jam.m2. Membran M45% memiliki nilai fluks yang lebih besar dari membran yang lainnya. Semakin banyak bahan pembentuk pori yang digunakan, semakin banyak pori yang terbentuk. Hasil dari uji kuat lentur untuk membran M45% cukup rapuh tapi masih dapat digunakan dengan tekanan 0,5 atm. Struktur dari pori membran dilihat dengan menggunakan SEM, diperoleh pori- pori yang tidak teratur dengan ukuran pori sekitar 5 μm. Kata Kunci: Membran, keramik, tepung beras, aditif, mikrofiltrasi ABSTRACT 
ISOLATION AND IDENTIFICATION OF TERPENOID COMPOUNDS FROM n-HEXANA EXTRACT OF PERMOT PLANT BRACTS (Passiflora foetida L) Maria Dewi Astuti; Tuti Sriwinarti; Kamilia Mustikasari
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.162 KB) | DOI: 10.20527/jstk.v11i2.4041

Abstract

Isolation and identification of terpenoids compounds from n-hexane extract of permot bracts plants (Passiflora foetida L.) has been done. Crude powder of the bracts permot plants were macerated with n-hexane. Fractionated of n-hexane extract on a vacuum liquid chromatography to afford three fractions (A, B and C). Purification of fraction B with TLC preparative to afford isolate B1 and B2.. A compound of spectra UV-Vis B1 indicating the presence of conjugation of double bond (C=C), furthermore the IR spectra showed vibration for - OH group, C=O of the ester group, C-O group, and methyl group (-CH3) in position gem dimethyl. 1H-NMR spectra showed the signal from methoxy group (OCH3), olefin protons (-CH=CH-), protons in carbon to the oxygenation (C-OH), two units gem dimethyl, and three methyl group (-CH3). 13C-NMR spectra showed thesignal from carbon aliphatic group, carbon carbonil (C=O) of the ester group, double bond carbon (C=C), and carbon to the oxygenation (C-OCH3 and C-OH)). Based on the analysis of UV-Vis, IR, 1H-NMR, and 1H-NMR spectrocopies data, isolate B1 is suggested from terpenoids type triterpenoids pentacyclic that conjugation of double bond and ester group.Keywords: Terpenoids, triterpenoids pentacyclic, permot (Passiflora foetida L.), and n-hexane extract.
SINTESIS DAN KARAKTERISASI MAGNETIT (Fe3O4) SERTA APLIKASINYA SEBAGAI ADSORBEN METHYLENE BLUE Retno Agnestisia
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6090.582 KB) | DOI: 10.20527/jstk.v11i2.4039

Abstract

Synthesis, characterization and adsorption study of magnetite have beenconducted. Magnetite was synthesized by coprecipitation method. The characterizations of magnetite were carried out with spectroscopy FTIR (Fourier Transform Infrared) and XRD (X-ray diffraction). The adsorption study was conducted using a batch system with the studied adsorption study including optimum pH, optimum contact time and adsorption equilibrium. The results showed that coprecipitation method has succeeded to form magnetite that has magnetism properties. Magnetite can adsorbed methylene blue from aqueous phase, with the maximum adsorption at pH 5 and contact time of 90 minutes. Adsorption of methylene blue by magnetite follows the adsorption pattern of the Langmuir isotherm with the adsorption energy of 25.59 kJ/mol and adsorption capacity of 43.86 mg/g. The results of magnetite synthesis can accelerate the process of separating the adsorbent particles in a methylene blue solution using an external magnetic field.Keywords : magnetite, coprecipitation, adsorption, and methylene blue.
Synthesis of Natural Clay Magnetite Composite as Adsorbent of Methylene Blue I Made Sadiana; Abdul Hadjranul Fatah; Karelius Karelius
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (701.616 KB) | DOI: 10.20527/jstk.v11i2.4042

Abstract

Synthesis of natural clay magnetite composite has been done. The composite was applicated as adsorbent of methylene blue dye in aqueous solution. natural clay was activated with acid solution, synthesis of natural clay magnetite composite was done by coprecipitation method in the molar ratio Fe2+: Fe3+ = 1 : 2 at temperature 85οC. Characterization of the synthesis results is done by XRD and FTIR. Adsorption using batch system with the optimum pH, kinetic and equilibrium aspects of adsorption were studied. The characterization results shows that iron oxide Fe3O4 (magnetite) can be composited with natural clay. The activated and natural clay magnetite composite can adsorbed methylene blue dye from aqueous solution, with the optimum adsorption at pH 3. Adsorption of those adsorbent followed the kinetic eqution of pseudo order 2 with reaction rate constant for activated and natural clay magnetite composite was 1.68 x 10-3 and 7.13 x 10-3 g/mg.minute. The isotherm adsorption is Langmuir isotherm with adsorption capacity was 1.72 x 10-4 mol/g and 1.84 x 10-4 mol/g. This kinetic reactions model shows that the natural clay magnetite composite is able to adsorbed rhodamine B in aqueous solution and accelerated separation of adsorbent from aqueous phase by external magnet field.Keywords: natural clay, magnetite, composite and adsorption.
PEMBUATAN RESIN PENUKAR KATION SELULOSA FOSFONAT DAN EFISIENSI PERTUKARANNYA TERHADAP UNSUR TANAH JARANG Anni Anggraeni; Elsa Aghnia M; Titin Sofyatin; Diana Hendrati; Husein H. Bahti
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.878 KB) | DOI: 10.20527/jstk.v11i2.4034

Abstract

Kromatografi pertukaran ion telah digunakan secara luas dalam proses pemisahan dan pemurnian. Resin penukar ion komersial sebagai fasa diam pada umumnya berbasis polistiren. Pada penelitian ini dikaji pembuatan resin penukar kation dengan gugus sulfonat yang diikatkan pada selulosa dari serat batang pisang sebagai limbah pertanian. Pembuatan resin penukar kation diawali dengan proses isolasi selulosa dari serat batang pisang, kemudian proses fosforilasi menggunakan fosfor oksiklorida 16,67% dalam metilen klorida (1:5), dan karakterisasi resin selulosa fosfonat menggunakan spektrofotometer inframerah, XRF, uji kapasitas pertukaran ion dan efisiensinya terhadap ion-ion Gadolinium (III), Neodimium (III), Serium (IV), Samarium (III), Praseodimium (III) dan Yttrium (III). Hasil penelitian menunjukkan kemurnian selulosa dari proses isolasi adalah 90,70% dan proses fosforilasi optimum pada suhu 90oC selama 2,5 jam. Karakterisasi dari spektrum inframerah menunjukkan adanya puncak baru, yaitu pada serapan 1240 cm-1 yang merupakan daerah untuk regangan P-O-C dan diperkuat dengan meningkatnya intensitas pada serapan 1319 cm-1 yang menunjukkan regangan P=O. Massa jenis resin selulosa terfosforilasi adalah 1,68 g/mL dan kapasitas pertukaran kation 1,99 mek/g. Efisiensi pertukaran kation resin terhadap ion-ion Gadolinium (III), Neodimium (III), Serium (IV), Samarium (III), Praseodimium (III) dan Yttrium (III) berturut-turut adalah 108,8±0,17x10-3, 111,9±0,04x10-3, 98,1±0,02 x10-3, 96,4±0,79x10-3, 82,3±0,04x10-3 dan 92,4±0,04x10-3 mek/g. Kata Kunci: Resin penukar kation, selulosa, fosforilasi, kapasitas pertukaran ion, efisiensi pertukaran ion 
Chemical Preliminary Evaluation of leaves, Peels, and Fleshs Fruit of Limau Kuit: Local Orange of South Kalimantan Azidi Irwan; Kamilia Mustikasari; Dahlena Ariyani
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v11i2.4040

Abstract

This research was conducted to know about fruit of limau kuit from South Kalimantan which includes weight, diemeter of fruit, volume of fruit juice, water content, and ash content of its flesh as well as water and ash content on leaves and fruit peel. Chemical preliminary examination includes measurement of pH of fruits juice and phytochemical screening test on leaves, fruit peel, and fruit flesh. The result is obtained with mean value as follows: weight 154,82 g, diameter of fruit 68,45 mm, volume of juice water 44,60 ml, water content of fruit flesh 67,16%, water content of fruit peel 65,67%, leaf water content 65,88%, ash content 0,72%, fruit ash content 1,39%, and leaf ash content 3,32%. Measurement of pH of fruit juice without dilution; 100x; 1000x; and 10000x dilutions showing a value of 1.62; 2.08; 2.68; and 3.33, respectively. The results of the phytochemical examination on fresh samples of leaves, fruit peels, and fruit juices showed all samples giving positive (+) test results against alkaloids, saponins, steroids, triterpenoids (except negative (-) for fruit skin samples), tannins, and flavonoids (except (-) for the juice of the fruit). While the samples with the fresh-dried treatment extracted each using ethanol and n-hexane solvents showed (+) results for all sample extracts in both fresh-dried treatments, except (-) saponins in dried leaves (ethanol extract) and fruit peels fresh (n-hexane extract). Tannin test for fresh leaf (n-hexane) and flavonoid for fresh leaves (ethanol extract) and fresh fruit peel (ethanol extract) showed negative results.Keywords: Limau kuit, South Kalimantan, chemical preliminary test, phytochemical test, ethanol extract, n-hexane extract.

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