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<![CDATA[PEMANFAATAN AMPAS KOPI SEBAGAI ARANG AKTIF UNTUK ADSORBEN RHODAMIN B ]]>
<![CDATA[Evifania Juvita Anggriani]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.884
<![CDATA[Research on the use of coffee grounds activated carbon as an adsorbent to reduce the content of Rhodamine B dye has been carried out. The activated carbon used is chemically activated by immersion using 1 M H3PO4 solution for 24 hours then burned at 500ËšC for 45 minutes, while physically activated it is carried out by burning at 500ËšC for 45 minutes. The results of the study which showed the characteristics published in SNI 06-3730-1995, the optimum conditions of Rhodamine B adsorption on both activated carbon at pH 7 and contact time at 15 minutes. Rhodamine B adsorption isotherms on chemically and physically activated carbon using Langmuir adsorption isotherm models with adsorption capacities are 1.6943 mg/g and 1.5936 mg/g, respectively. Chemical and physics activated coffee grounds activated carbon were applied to reduce Rhodamine B from sarung waste in Samarinda. Decrease of Rhodamine B levels in 25 mL of waste samples containing Rhodamine B 14.1860 mg/g with 1 gram of adsorbent were 89.1125% and 60.7923%, respectively. Keywords: Activated carbon, Spent coffee grounds, Rhodamine B, Adsorption]]>
<![CDATA[SINTESSI N-LAUROIL SERINAMIDA MELALUI REAKSI AMIDASI SERIN DENGAN METIL LAURAT DAN REAKSI AMIDASI SERIN DENGAN LAUROIL KLORIDA ]]>
<![CDATA[Friskila Delfia Nande]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.735
<![CDATA[Research 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).]]>
<![CDATA[PHENOL ADSORPTION USING COMPOSITE ADSORBENT Fe3O4-ACTIVATED CHARCOAL COFFEE GROUNDS ]]>
<![CDATA[Elen Reknosari]]>;
<![CDATA[Teguh Wirawan]]>;
<![CDATA[Soerja Koesnarpadi]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.923
<![CDATA[ABSTRACT 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]]>
<![CDATA[AMPAS TAHU SEBAGAI NUTRISI Saccharomyces cerevisiae DALAM PEMBUATAN BIOETANOL DARI BERAS MERAH (Oryza nivara) DENGAN PROSES FERMENTASI ]]>
<![CDATA[Monica Shara Sinaga]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.788
<![CDATA[Research on the production of bioethanol from red rice flour starch (Oryza nivara) through enzymatic hydrolysis process and fermentation by Saccharomyces cerevisiae with the addition of tofu dregs as a nutrient source of microorganisms has been conducted. The process of bioethanol production consisted of hydrolysis, fermentation, distillation and ethanol content analysis using gas chromatography instrument. This research was conducted to determine the concentration of nutrients and the duration of fermentation to produce optimal ethanol levels. The hydrolysis process is carried out enzymatically through the liquification stage using ?-amylase and gluco-amylase at the saccharification stage. Then the fermentation process continued with a variation of 7, 8 and 9 days using Saccharomyces cerevisiae with the addition of tofu dregs concentration 0.5 %, 1 % and 1.5 % (w/v). The highest ethanol levels obtained from gas chromatography analysis was the addition of tofu dregs 1 % (w/v) and fermentation time for 8 days, with ethanol content obtained at 59.325 %.]]>
<![CDATA[Optimasi Sintesis Asam Lemak Hidroksamat Menggunakan Minyak Mentah Dedak Padi ]]>
<![CDATA[Muhsinun Muhsinun]]>;
<![CDATA[Fena Prayunisa]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.958
<![CDATA[Asam lemak hidroksamat (Fatty Hydroxamic Acids/FHA) telah berhasil di sintesis dari minyak mentah dedak padi. Adapun tujuan dari penelitian ini adalah sintesis asam lemak hidroksamat dari minyak mentah dedak padi secara enzimatis dan menentukan kondisi optimumnya, yang meliputi tiga tahap pengerjaan yaitu tahap preparasi minyak, tahap optimasi sintesis dan tahap karakterisasi. Pada tahap preparasi minyak diperoleh rendemen minyak mentah dedak padi sebanyak 23%. Pada tahap optimasi didapatkan kondisi optimum untuk sintesis asam lemak hidroksamat dari minyak mentah dedak padi adalah pada suhu 35oC selama 25 jam dengan perbandingan lipase (gram) : hidroksilamin (mmol) sama dengan 1 : 500 dan perbandingan enzim lipase (gram) : minyak mentah dedak padi (gram) sama dengan 1 : 75. Jumlah gugus asam hidroksamat dalam 1 gram sampel kering asam lemak hidroksamat adalah 2,98 mmol. Berdasarkan hasil analisis uji warna dengan Cu(II) dan Fe(III) didapatkan warna kompleks yang khas untuk kedua logam tersebut dengan asam lemak hidroksamat yaitu warna hijau dan merah tua. Sedangkan dari analisis FTIR, didapatkan spektrum gugus fungsi asam hidroksamat.]]>
<![CDATA[Isolasi dan Identifikasi Senyawa Metabolit Sekunder dari Rimpang Temu Hitam (Curcuma aeruginosa Roxb) ]]>
<![CDATA[Yuwinda Cindy Elisabet Panggabean]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.807
<![CDATA[Isolation and identification of secondary metabolites from ethyl acetate fraction of rhizomes of Temu Hitam (Curcuma aeruginosa Roxb.) have been done. The separation of ethyl acetate fraction and further seperation were performed using gravity column chromatography with n-hexane and ethyl acetate (9.5:0.5-3:7) as solvent systems to obtain the isolate (oil;0.0216 g). Based on UV analysis of isolate, the result showed 1 peak at ? 206.14 nm. In addition, the FT-IR spectra indicated the presence of functional groups of OH, aliphatic C-H, C=O and C-O. According to the result of the UV and FT-IR spectra, the isolate can be identified as terpenoid.]]>
<![CDATA[Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT ]]>
<![CDATA[Elliska Murni Harfinda]]>
<![CDATA[ JURNAL KIMIA MULAWARMAN Vol 18 No 1 (2020) ]]>
Publisher : <![CDATA[Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman ]]>
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DOI: 10.30872/jkm.v18i1.844
<![CDATA[Ca-alginate for the adsorption of Fe and Mn in peat water has been carried out using a batch method. Brownish water color, low pH, and high content of Fe and Mn metals are obstacles in direct utilization of peat water. Peat water treatment can be done by the adsorption method. The stages of this study began with the preparation of the adsorbent by dripping Na-alginate solution into a variety of CaCl2 solution concentrations. Furthermore, the adsorption of peat water was carried out by batch method with variations in the contact time and mass of the adsorbent to get the adsorbent with the highest % removal. The optimal contact time for Fe and Mn adsorption on peat water is 6 hours. The optimal % removal value for the influence of Fe adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 20.38% and 21.19%, respectively. The optimal % removal value for the influence of Mn adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 30.98% and 41.37%, respectively. The optimal mass of adsorbent for Fe and Mn adsorption in peat water is 0.75 g. The optimal % removal value for the influence of Fe adsorption mass adsorption for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 79.28% and 21.67%, respectively. The optimal % removal value for the mass effect of Mn adsorption adsorption for Ca-alginate variation of 0.1 M and 0.2 M CaCl2 solution respectively at 24.44% and 26.13%.]]>
