ALKIMIA : Jurnal Ilmu Kimia dan Terapan http://jurnal.radenfatah.ac.id/index.php/alkimia <p>ALKIMIA : <span lang="en">Journals of chemistry and applied science</span> with number of E-ISSN: 2580-9881 and P-ISSN: 2580-9873 is a journal of chemistry that publishes research results related to the findings in the field of organic chemistry, inorganic, physical, analytical, biochemical and other as a problem solving in the field of environment, energy, and food. ALKIMIA is published twice a year in February and August, by chemistry science and technology faculty of UIN Raden Fatah Palembang. The editors are happy to invite researchers to publish their research results at Journal ALKIMIA. The Open Journal System (OJS) has been applied to all processes in this journal. Therefore, the author is required to register and submit the manuscript online.</p> en-US <ol><li>The author saves the copyright and gives the journal simultaneously with the license  under Creative Commons Attribution License which permits other people to share the work by stating that it is firstly published in this journal.</li><li>The author can post their work in an institutional repository or publish it in a book by by stating that it is firstly published in this journal.</li><li>The author is allowed to post their work online (for instance, in an institutional repository or their own website) before and during the process of delivery. (see Open Access Effect).</li></ol> jurnal.alkimia@gmail.com (Elfira Rosa Pane) sirodiah1406@gmail.com (Siti Rodiah) Sat, 30 Jun 2018 20:22:00 +0000 OJS 3.1.0.1 http://blogs.law.harvard.edu/tech/rss 60 Pemanfaatan Bagas sebagai Bahan Baku Pembuatan Bioetanol dengan Metode Pretreatment Alkali http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2254 <p>Indonesia being an agricultural country produces a large amount of cellulosic biomass such as sugarcane bagasse. This provides a low-cost feedstock for fermentative production of a wide range of fuels, economic, renewable and environmentally friendly. With utilization of renewable energy resource a crisis of energy could be solved. Sugarcane bagasse contains lignocellulose which can be broken down into glucose and produce ethanol by fermentation process. This study describes the pretreatment of sugarcane bagasse with different method of alkaline pretreatment. Sugarcane bagasse was pretreated with heating process (80oC) and without heating process (25oC) and different concentration of Alkaline (NaOH). This study also descibes the influence of fermentation time to refractive index, volume of bioethanol and % Ethanol. The alkaline pretreatment method was able to effectively increase enzymatic disgetibility of sugarcane bagasse cellulose. Based on the best result, the best condition for pretreatment to produce highest cellulose (50,71 %) was pretreatment with heating process and using NaOH 3 N. The highest refractive index was 1,3391 from 5 days fermentation. The highest volume of bioethanol was 16 ml from 7 days fermentation. The highest % etanol was 56 based on standard plot analysis method and 47,708 based on GC analysis method.</p> Rima Daniar ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2254 Fri, 29 Jun 2018 00:00:00 +0000 Pembuatan Media Animasi untuk Topik Hibridisasi dengan Program Macromedia Flash http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2255 <p>Computer-based learning media can be one alternative in the learning of chemistry, especially hybridization concepts. This media will visualize abstract concepts into animations, drawings and help students understand concepts with interactive questions. The purpose of this research is to produce learning media on hybridization materials using macromedia flash program that can help the process of chemical learning. The type of research conducted is Research and Develompment (R &amp; D). The instrument used is a questionnaire with Likert scale. The result of this research is hybridization learning media with macromedia flash program suitable to be used for science students at school.</p> Fitria Wijayanti, Syukri S, Yerimadesi Yerimadesi ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2255 Fri, 29 Jun 2018 00:00:00 +0000 Kulit Kacang Tanah (Arachis hypogaea L.) sebagai Adsorben Ion Pb(II) http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2258 <p>An experiment on Pb (II) metal ion adsorption using peanut (Arachis hypogea L.) shell without activation (KK), acid-activated (KKA), and base-activated (KKB) has been conducted. Peanut shell powder was activated using H3PO4 and KOH to improve adsorption effectivity and capacity. Characterization results using FT-IR spectrophotometer showed peak at 3410 and 2901 cm-1 indicated OH dan CH aliphatic from framework of cellulose. Optimum condition of Pb(II) adsorption for KK, KKA and KKB was occurred at the same optimum pH, that was pH 5, with contact time 60, 90 and 70 min, respectively. The adsorption kinetic parameter of Pb(II) ion for KK, KKA, and KKB followed pseudo second order kinetic with rate constants (k) in order of 12.279, 4.149, and 32.258 g mmol-1 min-1, with maximum adsorption capacity based on Langmuir isotherm model of 0.598, 0.505, and 0.622 mmol g-1, and adsorption energy of 26.735, 25.789, and 29.245 kJ mol-1, respectively. The results indicated that KOH-activated peanut (Arachis hypogea L.) shell has good adsorption affinity for Pb(II) with highest adsorption capacity compare to those from non-activated and acid-activated.</p> Ade Oktasari ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2258 Fri, 29 Jun 2018 00:00:00 +0000 Pengaruh Temperatur terhadap Persentase Yield pada Proses Perengkahan Katalitik Sampah Plastik menjadi Bahan Bakar Cair http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2259 <p>Peningkatan konsumsi energi dan peningkatan timbulan sampah plastik merupakan dua permasalahan besar yang muncul seiring dengan pertumbuhan ekonomi dan pertambahan penduduk. Salah satu jenis sampah plastik polystyrene yang dapat diolah menjadi bahan bakar cair dengan proses perengkahan adalah styrofoam. Pada penelitian ini, proses perengkahan sampah plastik polystyrene dilakukan dengan proses perengkahan katalitik dengan menggunakan katalis Al2O3. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur terhadap persentase yield produk dan karakteristik produk yang dihasilkan dari proses perengkahan katalitik sampah plastik polystyrene menggunakan katalis Aluminium Oksida. Proses perengkahan katalitik dilakukan didalam reaktor jenis fixed bed, dimana proses berlangsung pada suhu 150 oC, 200 oC, 250 oC dan 300 oC dengan waktu perengkahan 60 menit dan berat katalis 6% dari berat styrofoam yaitu 250 gram. Dari hasil penelitian diperoleh persentase yield cairan tertinggi sebesar 17,0% pada temperatur 250 oC, sedangkan karakteristik bahan bakar cair yang mendekati karakteristik gasoline yaitu pada temperature 250 oC, lama waktu perengkahan 60 menit dan berat katalis 6%, dimana masing-masing diperoleh nilai densitas sebesar 0.763 g/mL, specific gravity sebesar 0.778 dan oAPI gravity sebesar 50.2. Untuk bahan bakar cair yang diperoleh dari hasil perengkahan polystyrene pada suhu 150 oC, 200 oC dan 300 oC masih berada dalam rentang toleransi karakteristik bensin. Bahan bakar cair yang dihasilkan dari proses perengkahan katalitik dianalisa menggunakan alat GC-MS, dimana hasil analisa menunjukkan bahwa bahan bakar cair tersebut termasuk kedalam fraksi bensin.</p> Nurul Kholidah ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2259 Fri, 29 Jun 2018 00:00:00 +0000 Pemanfaatan Limbah Tulang Ikan Tenggiri Sebagai Sumber Gelatin Halal Melalui Hidrolisis Larutan Asam Dengan Variasi Rasio Asam http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2260 <p>Gelatin diperoleh dari hidrolisis parsial kolagen pada kulit, tulang, kulit jangat, dan jaringan penghubung dari tubuh binatang, yang banyak digunakan baik pada industri pangan, non pangan, maupun farmasi. Gelatin umumnya berasal dari sapi dan babi. Bahan sumber gelatin dari babi menjadi masalah di Indonesia yang mayoritas berpenduduk muslim, karena babi diharamkan untuk dikonsumsi, sedangkan bahan gelatin dari mamalia terutama sapi juga menimbulkan masalah lain berkaitan dengan berita penyakit sapi gila (mad cow disease) atau bovine spongioform encephalopathy (BSE). Pada penelitian ini telah dilakukan pemanfaatan tulang ikan tenggiri sebagai sumber alternatif gelatin halal. Tulang ikan tenggiri merupakan hasil samping atau limbah pada industri rumah tangga yaitu pembuatan pempek di kota Palembang. Penelitian ini bertujuan menghasilkan gelatin halal dari tulang ikan tenggiri yang dihidrolisis menggunakan larutan asam yang berasal dari perasan jeruk nipis dengan variasi rasio asam/tulang ikan 1:3, 1:5, dan 1:7. Dari hasil penelitian ini, diperoleh padatan gelatin yang berwarna coklat. Rasio tulang ikan/asam 1 : 3 adalah rasio optimum yang menghasilkan rendeman tertinggi yaitu 2,4643% dengan kadar air 24,20%. Dari hasil penelitian ini, diharapkan dapat meningkatkan nilai ekonomi dan pengembangan komoditi perikanan khususnya di wilayah sumatera selatan.</p> Siti Rodiah, Mariyamah Mariyamah, Riska Ahsanunnisa, Desti Erviana, Fachtur Rahman, Annisa Widya Budaya ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2260 Fri, 29 Jun 2018 00:00:00 +0000 Perbandingan Mutu Tempe Dari Kacang Kedelai Dengan Kacang Tanah http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2262 <p>Tempe is traditional Indonesian food that has been known for a long time. Research on the quality of tempe with variations of peanut and soybean aims to see the variation of tempe making using peanut and soybean. Quality testing in this study through organoleptic test and chemical analysis such as water content, and ash content. The result of organoleptic test on flavour showed that panelist preferential T2 much higher than T1. The average water content respectively were 59,11% for soybean and 55,17% for peanut. Meanwhile the average ash content the highest were soybean 0,67% and for the peanut were 0,59%.</p> Riska Ahsanunnisa ##submission.copyrightStatement## http://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/2262 Mon, 17 Dec 2018 10:43:42 +0000