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Published by Universitas Islam Negeri Syarif Hidayatullah Jakarta

ISSN : 24606065 EISSN : 25483013 DOI : 10.15408/jkv

Core Subject : Science,

Chemistry

Jurnal Kimia Valensi is a biannual and peer-reviewed open access journal published by Department of Chemistry, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta. This journal covering all aspect of chemistry.

Arjuna Subject : Umum - Umum

Articles 425 Documents

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Penggunaan H-Zeolit dan Tawas dalam Pemurnian Crude Glycerol dengan Proses Adsorpsi dan Koagulasi Isalmi Aziz; Nur Hijjah Bayani Fadhilah; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Production of biodiesel from used cooking oil byproducts such as crude glycerol with low purity. The crude glycerol containing compounds impurities such as free fatty acids, alcohol, soap, catalyst and water. Compound adsorption of impurities can be done with the H-zeolite as adsorbent, but the resulting quality is still not good. To improve its quality, this research was added alum (coagulation) process so that the adsorption of colloidal-sized compound impurities which can be separated from the glycerol. The purpose of this research is determine optimal condition of adsorption and coagulation impurity compounds of crude glycerol by using H-zeolite and alum and also determine quality of glycerol was obtained. First, crude glycerol acidified by phosphoric acid 85% (pure analysis) until desired pH ±2.5. It was obtained purity of glycerol 72.797%. The next process is adsorption with activated H-zeolite and it obtained purity of glycerol 77.079%. The last process in this research is adsorption and coagulation by using H-zeolite and alum. The highest purity glycerol 93.803% was obtained from condition of adsorption and coagulation for 75 minutes; alum’s concentration 80 ppm; and temperature 60 ºC. The glycerol discharged from adsorption and coagulation process by using H-zeolite and alum is qualify Indonesia National Standard number 06-1564-1995 with 3.512% water content; 2.438% ash content; 0.247% MONG content; has no sugar; 1.259 g/mL density of glycerol; 0.2356% potassium content and 0.0410% aluminium content; and brighter color.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5143

Production of Ceramic Membrane Based on Acid- and Alkali-Activated Metakaolinite as Cooling Material for Monocrystalline Silicon Solar Cell Septiani Septiani; Wahyu Febri Ramadhy; Angie Islammiyati; Winda Rahmalia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Syarif Hidayatullah State Islamic University

Ceramic membrane based on acid- and alkali-activated metakaolinite has been produced. It was tested as a cooling material for monocrystalline silicon solar cells. Membrane was made by several stages, such as calcination of natural kaolinite at 600 oC for 6 hours to obtain metakaolinite, activation of metakaolinite by concentrated HCl and KOH, and preparation of ceramic membrane. Kaolinite, metakaolinite, and activated metakaolinite were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infra-red (FTIR), and gas sorption analyzer (GSA). Diffractogram of XRD showed that there was a structural change between activated metakaolinite and natural kaolinite. XRF analysis indicated that the Si/Al of HCl activated metakaolinite was three times higher than natural kaolinite. Activated metakaolinite was made into membrane by adding a binder, then heated at 800 °C for 6 hours. PV cells with and without cooling material were then analyzed their electrical performances. It was found that the maximum energy conversion yield of PV cells without using cooling material was 2.30%, while the maximum energy conversion yield of PV cells with cooling material of meta-kaolinite activated by HCl and KOH were respectively 2.72% and 2.94%.

Isolasi Dan Karakterisasi Senyawa α-Amirin Dari Kulit Batang Binjai (Mangifera Caesia) Kholifatu Rosyidah; Nor Latifah; Maria Dewi Astuti
Jurnal Kimia Valensi Jurnal Valensi Volume 2, No.2, Mei 2011
Publisher : Syarif Hidayatullah State Islamic University

Telah dilakukan isolasi dan karakterisasi senyawa α-amirin dari kulit batang binjai (Mangiferacaesia). Hasil analisis spektra IR menunjukkan adanya gugus OH, C-H, C=C, dan gem dimetil.Spektra 1H-NMR dan 13C-NMR menunjukkan adanya 30 karbon, delapan diantaranya merupakanunit metil, dan satu ikatan rangkap. Struktur senyawa dikarakterisasi berdasarkan data spektroskopiIR dan NMR serta dibandingkan dengan data spektroskopi dari literatur. Berdasarkan data tersebut,senyawa hasil isolasi adalah α-amirin.

Efektivitas Pemanfaatan Serbuk Gergaji dan Limbah Media Tanam Jamur (Baglog) sebagai Bahan Baku Pembuatan Biogas Dikdik Mulyadi; Lela Mukmilah Yuningsih; Desi Kusumawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Biogas is one of energy that can be produced by anaerobic fermentation of the organic compounds. The objective of this study was to determine the effectiveness of the utilization of waste of media mushroom growth (baglog) with sawdust as raw material for biogas with cow dung activators. The study was conducted through anaerobic fermentation of the samples containing waste baglog (sample 1) and sawdust (sample 2), with the addition of cow manure activator to each sample. Both of these samples do anaerobic fermentation for 32 days, then measuring the volume of biogas every 4 days for 32 days. Methane content in samples 1 and 2 measured by using gas chromatography. To see the effect of the addition of activators cow dung biogas volume measurement was carried out with cow dung without addition baglog waste and sawdust. The process of degradation baglog and sawdust with an activator of cow dung could be observed in some of the parameters through total solids (TS), total volatile solids (TVS), volatile fatty acids (VFA), the degree of acidity (pH), and C/N ratio. The results showed that effectiveness of sample 1 resulted in the everage of total volume biogas 28% higher than sample 2. The content of methane in sample 1 and sampel 2 was 54% %, and 0.21% respectively. The fermentation process biogas production in this experiment was carried out at pH 7, with a value of TS, TVS and VFA showed a decrease trend after the fermentation process, C/N ratiowas lower than the baglog waste sawdust until day 32 retention time. Keywords: Sawdust, baglog waste, biogas, fermentation, methane DOI : http://dx.doi.org/10.15408/jkv.v2i1.3100

Senyawa 5,3'-Dihidroksi-7,4'-Dimetoksiflavon dari Kulit Batang Tanaman Akway (Drimys beccariana Gibs) dan Aktivitas Antimalarianya Tarso Rudiana; Tati Herlina; Euis Julaeha
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 2, November 2018
Publisher : Syarif Hidayatullah State Islamic University

Akway (Drimys beccariana Gibs) is an endemic plant of Papua. Ethnobotany is used as a medicinal plant, one of which is used as a malaria drug. This study aims to isolate, determine the chemical structure and evaluate the antimalarial activity of D. beccariana stem bark. Powder of D. beccariana bark is macerated with methanol and fractionated using n-hexane and ethyl acetate. Ethyl acetate extract was fractionated using gradient liquid chromatography (KCV) (n-hexane: ethyl acetate: methanol). The KCV fraction was separated by repeated gravity column chromatography and preparative thin layer chromatography (TLC-P) to obtain Isolate 1. Isolate 1 was determined by spectroscopic methods including UV-Vis, IR, 1D NMR, and 2D. Isolate 1 is determined by its compound structure which is 5,3'-dihydroxy-7,4'-dimethoxyflavone. 5,3'-dihydroxy-7,4'-dimethoxyflavone compounds evaluated antimalarial activity against Plasmodium falciparum in vitro with antimalarial activity better than artemisinin.

Screening Fitokimia dan Aktivitas Antioksidan Daun Eceng Gondok (Eichhornia crassipes) Dianty Wijaya; Putri Purnama Yanti; Rafty Setya A; Muhammad Rizal; Rafty Setya A
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 1, Mei 2015
Publisher : Syarif Hidayatullah State Islamic University

Tanaman eceng gondok (Eichhornia crassipes) merupakan tumbuhan yang mengambang di permukaan air (gulma), dan mudah untuk terus bertumbuh. Bahkan dapat merugikan bagi lingkungan jika telah meluas. Maka dari itu dilakukan berbagai pengujian untuk mengetahui potensi-potensi metabolit sekundernya. Hasil Uji fitokimia pada daun eceng gondok mengindikasikan adanya steroid, tannin dan flavonoid. Dengan pengujian antioksidannya, diperoleh nilai IC50 yaitu sebesar 232,34 ppm. Hasil kromatografi lapis tipis menunjukkan bahwa eluen aseton – n-heksana (7:5) adalah yang paling baik dalam pemisahannya. Setelahnya fraksinasi dengan bantuan KOH pada ekstrak tanaman hasil maserasi dengan aseton, menunjukkan adanya kandungan steroid. Setelahnya di uji kolom dan didapati 2 fraksi yang berbeda. Fraksi A mengandung steroid. Sesuai dengan uji KLT dengan bantuan sinar UV.DOI :http://dx.doi.org/10.15408/jkv.v0i0.4965

Imobilisasi Limbah Tritium dengan Karbon Aktif dan Zeolit sebagai Pengadsorpsi Thamzil Las; Djarot S Wisnusubroto; Nur Ernita
Jurnal Kimia Valensi Jurnal Valensi Volume 1, No.5, November 2009
Publisher : Syarif Hidayatullah State Islamic University

Analisis Karaterisasi Konsentrasi dan Komposisi Partikulat Udara (Studi Case : Surabaya) Eka Fithriani Ahmad; Muhayatun Santoso
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 2, November 2016
Publisher : Syarif Hidayatullah State Islamic University

Abstrak Pencemaran udara merupakan dampak yang sangat merugikan, tidak hanya bagi manusia tetapi juga akan berdampak buruk bagi ekosistem hewan dan tumbuhan. Pada penelitian ini akan mengkaji pencemaran udara dari Oktober 2012 hingga Februari 2014 melalui penelitian konsentrasi dan komposisi dari partikulat udara dengan ukuran PM 2.5. Penelitian ini bertujuan untuk menentuan sumber asal pencemaran di Surabaya sehingga dapat dijadikan referensi berbasis ilmiah sebagai langkah untuk membuat keputusan dan kebijakan yang tepat dalam menanggulangi dampak pencemaran. Metode pengolahan data dalam penelitian ini adalah dengan menggunakan analisis reseptor modeling yaitu Positif Matrix Factorization (PMF) untuk mengetahui sumber asal pencemaran. Hasil pengukuran yang diperoleh pada konsentrasi PM 2,5 adalah 15.05 μg/m3 sehingga telah melebihi baku mutu tahunan yang telah ditetapkan PP 41 tahun 1999, USEPA, maupun WHO. Dalam partikulat terdapat konsentrasi black carbon (BC) sebesar 3.20 μg/m3 dan unsur Pb dengan konsentrasi 0.28 μg/m3 yang telah melebihi nilai baku mutu USEPA. Sedangkan hasil analisis reseptor modeling di dapatkan sumber asal polutan berasal dari biomass, vehicle, soil, industri Pb, industri Zn dan indutri Fe. Kata kunci: Partikulat mater 2.5, black carbon, Pb, positive matrix factorization, Surabaya Abstract Air pollution is a very adverse impact, not only for humans but also the ecosystem of plants and animals. This research examine air pollution from October 2012 until February 2014 through the research of concentration and composition of airborne particulates with a size of PM 2.5 μm. This study aims to determine the origin and location of pollution sources in Surabaya so that it can be used as scientific reference as a step to make the right decisions and policies in tackling the impact of pollution. Data processing method in this research used analysis of receptor modeling that is Positive Matrix Factorization (PMF) to determine the source of the pollution. Results obtained at a concentration of PM 2.5 was 15.05 μg/m3 so PM 2.5 has exceeded the quality standard yearly, based on PP 41 1999, USEPA and WHO. There are 3.20 μg/m3 concentration of black carbon (BC), element Pb in particulate matter with a concentration of 0.28 μg/m3 which has exceeded the value of the quality standard USEPA. The source of the pollutants come from biomass, vehicle, soil, industrial Pb, Zn and industries Fe industry. Keywords: Particulate matter 2.5, black carbon, Pb, positive matrix factorization, Surabaya DOI: http://dx.doi.org/10.15408/jkv.v0i0.3602

Aktivitas Senyawa Antidiabetes Ektrak Etil Asetat Daun Pandan Wangi (Pandanus Amaryllifolius Roxb.) Dede Sukandar; Sandra Hermanto; Imamah Al Mabrur
Jurnal Kimia Valensi Jurnal Valensi Volume 1, No.6, Mei 2010
Publisher : Syarif Hidayatullah State Islamic University

Penelitian ini dilakukan untuk mengetahui aktivitas antidiabetes dari ekstrak etil asetat daun pandanwangi (Pandanus amaryllifolius Roxb.) menggunakan metode α-glukosidase. Ekstrak dibuat dengancara perendaman menggunakan etil asetat. Uji antidiabetes dilakukan dengan menggunakan enzim α-glukosidase. Ekstrak etil asetat daun pandan wangi bersifat antidiabetes dengan aktivitaspenghambatan (IC50) sebesar 94,23 ppm. Hasil analisa GCMS menunjukkan ekstrak etil asetat daunpandan wangi mengandung senyawa aktif asam lemak dan turunannya, terpenoid, dan steroid.

Karakterisasi Karbon Aktif Asal Tumbuhan dan Tulang Hewan Menggunakan FTIR dan Analisis Kemometrika Yusraini Dian Inayati Siregar; Rudy Heryanto; Nur Lela; Tri Heny Lestari
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 2, November 2015
Publisher : Syarif Hidayatullah State Islamic University

Activated carbon is widely used as an adsorbent in gas purification, refining pulp, and also for the purification of food products, among others, oil purification, refining cane sugar, beet sugar, corn sugar, eliminate the taste and odor of drinking water. Carbon active can be derived from plant and animal bone. This study aims to analyze the differences in spectral profile of activated carbon from plants and animal bones by using FTIR. The data combined with the results of FTIR analysis chemometrics to classify and categorize the data, so it is clear where the activated carbon from plants and animal bones. FTIR analysis methods combined with chemometrics analysis through modeling PCA (Principal Component Analysis) and PLS-DA (Partial Least Squares-Discriminant Analysis) is able to distinguish between activated carbon derived from plants (coconut shell) and animal bones (beef and pork). PCA with total diversity of 89% were able to classify the samples of activated carbon plant and animal bones. PLSDA models successfully predicted the test sample is based on a sample group of activated carbon raw material. Manufacture of activated carbon predictive models with PLS calibration generates R2, R2 predictions, RMSEC, and RMSEP respectively by 0.9787389, 0.9662152, 0.0687364 and 0.0928362. The results showed that FTIR spectra and can be used to distinguish chemometrics activated carbon derived from plant and animal bonesDOI :http://dx.doi.org/10.15408/jkv.v0i0.3146.

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Contact Name
Dr. Sandra Hermanto, M.Si

Contact Email
hermantokimia@uinjkt.ac.id

Phone
+6285220042401

Journal Mail Official
kimia@uinjkt.ac.id

Editorial Address
Program Studi Kimia, Fakultas Sains dan Teknologi, UIN Syarif Hidayatullah Jakarta

Location
Kota tangerang selatan,

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