JURNAL KIMIA MULAWARMAN
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PHENOL ADSORPTION USING COMPOSITE ADSORBENT Fe3O4-ACTIVATED CHARCOAL COFFEE GROUNDS
Full text linkABSTRACT
Phenol adsorption using composite adsorbent Fe3O4-activated charcoal coffee grounds has been done. Composite adsorbent Fe3O4 -activated charcoal coffee grounds are synthesized from FeSO4. 7H2O and FeCl3. 6H2O with a ratio of 3: 2 and then compiled with activated coffee charcoal. The composite adsorbent Fe3O4-activated coffee charcoal was characterized by Fourier Transform Infared (FTIR) and Scanning Electron Microscopy (SEM) as well as the adsorption test on phenol. The results of the characterization with Fourier Transform Infared (FTIR), peak 1604.77 cm-1 appeared showing the absorption of C=O which states that coffee grounds have formed carbon. Beside that, Fe3O4-activated charcoal composite adsorbent peaks appear at a wavelength of 509.21 cm-1 which is a Fe-O group showing that Fe3O4 nanoparticles have been successfully grafted on the active charcoal structure. The optimum conditions of phenol adsorption using adsorbent composite Fe3O4-activated coffee grounds at 30 minutes contact time and pH 5.
Keywords: Adsorption, Phenol, Magnetite, Active Charcoal, Coffee Grounds
ABSTRAK
Adsorpsi fenol menggunakan adsorben komposit Fe3O4-Arang aktif ampas kopi telah dilakukan. Adsorben komposit Fe3O4-Arang aktif ampas kopi disintesis dari FeSO4.7H2O dan FeCl3.6H2O dengan perbandingan 3:2 kemudian dikomposit dengan arang aktif ampas kopi. Adsorben komposit Fe3O4-Arang aktif ampas kopi dikarakterisasi dengan Fourier Transform Infared (FTIR) dan Scanning Electron Microscopy (SEM) serta dilakukan uji adsorpsi terhadap fenol. Hasil karakterisasi dengan Fourier Transform Infared (FTIR), muncul peak 1604,77 cm-1 menunjukkan adanya serapan C=O yang menyatakan bahwa ampas kopi telah membentuk zat karbon. Selain itu adsorben komposit Fe3O4-arang aktif ampas kopi muncul peak pada panjang gelombang 509,21 cm-1 yang merupakan gugus Fe-O menunjukkan bahwa nanopartikel Fe3O4 telah berhasil tercangkok pada struktur arang aktif. Kondisi optimum adsorpsi fenol menggunakan adsorben komposit Fe3O4-arang aktif ampas kopi adalah pada waktu kontak 30 menit dan pH 5.
Kata kunci: Adsorpsi, Fenol, Magnetit, Arang Aktif, Ampas Kop
SINTESSI N-LAUROIL SERINAMIDA MELALUI REAKSI AMIDASI SERIN DENGAN METIL LAURAT DAN REAKSI AMIDASI SERIN DENGAN LAUROIL KLORIDA
Full text linkResearch on synthesis N-lauroyl serinamide through serine reaction with methyl laurate and lauroyl chloride has been carried out. Synthesis N-lauroyl serinamide by two reaction methods, the first method was through the esterification reaction of lauric acid to produce methyl laurate and then an amidation reaction was carried out by serine to produce N-lauroyl serinamide with percent yield of 73.86% and HLB value of 6.54. Through the FTIR test showed vibration absorption of the carbonyl amide group at wave number 1624.96 cm-1. The second method is through the chlorination reaction where lauric acid is converted to lauroyl chloride and then an amidation reaction is carried out by serine to produce N-lauroyl serinamide with percent yield of 93.75% and HLB value of 7.27. Through the FTIR test showed vibration absorption of the amide carbonyl group at wave number 1631.78 cm-1. The result shows that N-lauroyl serinamide can be synthesized through serine reaction with methyl laurate and lauroyl chloride which can be used as an emulsifier o/w (oil in water).Penelitian sintesis N-lauroil serinamida melalui reaksi amidasi serin dengan metil laurat dan lauroil klorida telah dilakukan. Sintesis N-lauroil serinamida melalui 2 metode reaksi, yang pertama melalui reaksi esterifikasi asam laurat menghasilkan metil laurat dan selanjutnya dilakukan reaksi amidasi dengan serin untuk menghasilkan N-lauroil serinamida dengan persen rendemen sebesar 73,86% dan nilai HLB sebesar 6,54. Melalui uji FT-IR menunjukkan serapan vibrasi dari gugus karbonil amida pada bilangan gelombang 1624,96 cm-1. Yang kedua melalui metode reaksi klorinasi dimana asam laurat dikonversi menjadi lauroil klorida dan selanjutnya dilakukan reaksi amidasi dengan serin untuk menghasilkan N-lauroil serinamida dengan persen rendemen sebesar 93,75% dan nilai HLB sebesar 7,27. Melalui uji FT-IR menunjukkan serapan vibrasi gugus karbonil amida pada bilangan gelombang 1631,78 cm-1. Hal ini menunjukkan N-lauroil serinamida dapat disintesis melalui reaksi amidasi serin dengan metil laurat dan lauroil klorida yang dapat digunakan sebagai pengemulsi o/w (oil in water)
ISOLASI DAN IDENTIFIKASI SENYAWA TRITERPENOID DARI EKSTRAK n-HEKSAN FRAKSI 8 NODA KE- 2 DARI DAUN MERAH PUCUK MERAH (Syzygium Myrtifolium Walp.)
Full text linkIsolation and identification of triterpenoid componds n-hexsane extract on 8 fraction of second stain from red leaf of Pucuk Merah (Syzygium myrtifolium Walp.) leaves has done. The leaves red Pucuk Merah has potential as bioactive ingredients of traditional medicinal plants in Indonesia. These leaves contain secondary metabolites Triterpenoid which has been tested phytochemical and bioactivity as antibacterial and antioxidant. Isolation was conducted by maceration method with ethanol, ethanol extract was partition with n-Hexane solvent. Then proceed with the separation by column chromatography isocratic. The results of the isolation process which isolates obtained second fractions 8 as white powder to 1.2 mg with Rf value of 0.625. Based on GC-MS analysis showed four major compounds contained in n-hexane fraction red Pucuk Merah leaves namely cis-6-ethyl-4a-cis, trans-8a-perhydro-trans-1-2-methoxycarbonylethyl)-trans-2,tr; phthalic acid, di (2-propylpentyl) ester; benzenesulfonanilide; and 14-β-H-Pregnan with a molecular weight of 339; 390 ; 233 and 28
IDENTIFIKASI SENYAWA METABOLIT SEKUNDER EKSTRAK n-HEKSANA DAUN BERWARNA MERAH DARI Syzygium myrtifolium Walp.
Full text linkPucuk Merah (Syzygium myrtifolium Walp.) is one of the plants belonging to the genus Syzygium family Myrtaceae. This study has been carried out to isolate and identify secondary metabolite from red leaf of Syzygium myrtifolium Walp. This research was conducted by extracting Syzygium myrtifolium Walp. leaf with Etanol followed by partition using n-Hexane, n-Hexane extact was separated by Coloum Chromatography with system isokratik. The separation of produce a compounds isolated as white powder. The result of GC-MS analysis was suggested 3 major compounds that 1-Octadecene; bis (2-ethylhexyl) hexanedioic; and bis (2-ethylhexyl) phthalate with a molecules weight in a row 252; 370 and 390
PEMANFAATAN AMPAS TEBU SEBAGAI MATERIAL ADSORBEN BESI, MANGAN, pH, COD, BOD DAN TSS PADA AIR SUMUR
Full text linkThe research about adsorption concentration of iron, manganese, pH, COD, BOD and TSS at well water using baggase as adsorbent material. The content of iron and manganese was determined using AAS; pH using pH meter; COD and BOD using titration method; TSS using gravimetry me. The results of research showed the best percentage of decrease was use of baggase activated with KOH, can be showed in the reduction of iron was 42.80%, manganese 94.93%, pH 8.45%, COD 24.75%, BOD 32.21%, TSS 2.88%, the percentage of recovery of iron 98.05% and manganese 88.31%
PENENTUAN KADAR ASAM AMINO ESENSIAL (FENILALANIN, TREONIN, TIROSIN DAN VALIN) PADA TELUR PENYU DAN TELUR AYAM RAS
No full textDetermination of amino acid essential’s content (phenylalanin, threonin, tyrosin and valine) on turtle eggs and chicken eggs. Turtle eggs and chicken eggs are a high animal protein source and easy to obtain. This research has been carried out by categorizing of turtle eggs and chicken eggs by size and continued analysis of water content by Methods of Gravimetry, analyzes protein content total by the Method of Kjeldahl and analysis of the levels of essential amino acids with Method of HPLC (High Performance Liquid Chromatography). In this study, the researcher found the water content in the mix (large, medium and small) is 73,1891% and mixture of chicken eggs of different size is 73,1820%. Results of total protein content with used Kjeldahl method mixture based on the size of turtle eggs is 9,3114% and mixture chicken eggs is 10,2691%. Results of the amino acid content with used HPLC (High Performance Liquid Chromatography) method on a mixture of turtle eggs is Phenylalanin 1,69%, Threonin 1,16%, Tyrosin 2,46% and Valine 1,46%. Mixture of chicken eggs is Phenylalanin 0,30%, Threonin 0,61%, Tyrosin 1,03% and Valine 0,55%Determination of amino acid essential’s content (phenylalanin, threonin, tyrosin and valine) on turtle eggs and chicken egg
SINTESIS SURFAKTAN DIETANOLAMIDA DARI METIL ESTER MINYAK BIJI BUNGA MATAHARI (Helianthus annuus. L) MELALUI REAKSI AMIDASI
Full text linkSynthesis of dietanolamide surfactant from methyl ester of sunflower seed oil (Helianthus annuus. L) has been carried out through an amidation reaction. The synthesis process includes extraction, esterification and amidation. In the extraction process showed the oil content of sunflower seeds was 32.93% with an acid number of 3.25 mg KOH/g and ALB levels of 1.63%. Sunflower seed oil was then converted to methyl ester through the esterification process and obtained an acid number 1.84 mg KOH/g so that the ALB level dropped to 0.92% and obtained saponification numbers of 61.19 mg KOH/g. The most dominant composition of methyl ester of sunflower seed oil based on GC-MS analysis was methyl oleate at 23.28%. The FT-IR methyl ester spectrum gives a specific absorption peak for group C=O ester at wave number 1743 cm-1. Methyl esters are converted to diethanolamide through an amidation process. The resulting diethanolamide has an acid number of 9.7 mg KOH/g and a saponification number of 3.08 mg KOH/g. The FT-IR spectrum provides specific absorption peaks for groups C=O amides at wave numbers 1622 cm-1 and C-N at wave numbers 1055 cm-1. The value of HLB dietanolamide in practice is 13.6495 and in theory is 14.291 which includes the surfactant in the oil in water (O/W) emulsifying class
Perhitungan komputasi potensi Lawsone dan turunannya sebagai material aktif pada sel surya tersensitisasi zat warna
Full text linkLawsone is a dye which found in henna plant. Computational calculations have been done for the lawsone and its derivatives. This computational calculation aims to obtain a stable optimized structure and electronic properties to predict potency of lawsone as a photosensitizer in dye sensitizer solar cell. Computational calculation were using DFT for geometry optimization ground state and TDDFT for single point calculation excitation state. Both state for calculation using B3LYP functional and 6-311G(d,p) as basis set. The calculation in gas phase. Geometry optimization obtain lawsone structure is planar. The present of functional methoxy and hydroxy causing decresing and increasing of bond length. Based on electronic properties, such as excitation energy, maximum absorption wavelength and percentage excitation, L0 has better potential as active material in dye sensitized solar cell
ISOLATION OF STEROID COMPOUNDS IN THE n-HEKSANA FRACTION FROM JARUM TUJUH BILAH LEAVES EXTRACT (Leuenbergeria bleo (Kunth) D.C.)
Full text linkThis study aims to find secondary metabolites isolated from the leaves of the Jarum Tujuh Bilah (Leuenbergeria bleo (Kunth) D.C.). The method used was maceration, fractionation and column chromatography and was identified using Fourier Transformra Infra Red (FT-IR). The phytochemical preliminary test of the n-hexane fraction contains the steroid secondary metabolite compound. The results of column chromatography produced 75 vial bottles which were then identified by thin layer chromatography and produced 8 combined fractions (A-H fraction) based on the similarity of characterization, from the 8 fractions D and E forming yellow crystals. The yellow crystals formed are then cleaned and recrystallized to produce 11.7 mg white amorphous crystals. Compounds are characterized by FTIR spectrometers. Based on FTIR analysis, isolates showed IR spectrum λ max cm-1: 3375; 2927,98; 2852,18; 1680; 1462,51; 1376.81; 1329.74; 1043,92; 1022.02 and 956.27. Based on the results obtained by isolates, it is suspected that the compound is a steroid sterol
PEMANFAATAN ABU DAUN JAGUNG (Zea Mays) SEBAGAI SUMBER SILIKA PADA PEMBUATAN KATALIS Na/ SBA- 15 UNTUK REAKSI TRANSESTERIFIKASI MINYAK JELANTAH
Full text linkPreparation of Na / SBA-15 from corn leaves ash (Zea mays) as a substitute for TEOS (Tetraethyl Orthosilicate) applied as a heterogeneous catalyst in the transesterification reaction of used palm oil and methanol has been performed. The preparation of SBA-15 was conducted by surfactant template method and modification with Na was conducted by impregnation method. SBA-15 from corn leaves ash has a pore size ranging from 4.9 nm to 9.3 nm, a surface area of 595 m2/ g, a pore diameter of 3.95 nm and a pore volume of 0.99 cm3/ g. The yeild obtained from the first transesterification process was 96.46% with the free fatty acid content of the product 0.16 mg KOH/ g. The two most prominent methyl ester based on the chromatogram of the transesterification product, the two most prominent methyl ester in the product were methyl palmitate (36,32%) and methyl oleat (36,15%).
Keywords : Maize, SBA-15, TEOS (Tetraethyl Orthosilicate), Transesterification of used palm oil
Pembuatan silika mesopori Na/ SBA- 15 dari abu daun jagung (Zea mays) sebagai pengganti TEOS (Tetraethyl Orthosilicate) yang diaplikasikan sebagai katalis heterogen pada reaksi transesterifikasi minyak jelantah dan metanol telah dilakukan. Pembuatan SBA- 15 dilakukan dengan metode surfactant template dan modifikasi dengan Na dilakukan dengan metode impregnasi. SBA- 15 dari abu daun jagung memiliki ukuran pori berkisar 4,9 nm – 9,3 nm, luas permukaan 595 m2/g, diameter pori 3,95 nm dan volume pori 0,99 cm3/g. Aplikasi penggunaan katalis Na/ SBA- 15 pada proses transesterifikasi pertama diperoleh persen rendemen 96,46% dengan kadar asam lemak bebas 0,16 mg KOH/gr. Komposisi metil ester dominan berdasarkan hasil analisa GC-MS adalah metil palmitat 36,32% dan metil oleat 36,15%.
Kata kunci : Daun jagung, SBA- 15, TEOS (Tetraethyl Orthosilicate), Transesterifikasi Minyak Jelanta