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All Journal PROSIDING SEMINAR KIMIA JURNAL ATOMIK
RR Dirgarini Julia Nurlianti Subagyono
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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CO-PIROLISIS MIKROALGA HIJAU (Botryococcus braunii) DAN VICTORIAN BROWN COAL DENGAN VARIASI LAJU PEMANASAN MENGGUNAKAN THERMOGRAVIMETRIC ANALYSER Wardina Masdalifa; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo; Rudy Agung Nugroho
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Studi reaksi co-pirolisis mikroalga Botryococcus braunii dan Victorian brown coal dengan thermogravimetric analyser telah dilakukan. Penelitian ini dilakukan untuk mempelajari potensi dari campuran Botryococcus braunii dan Victorian brown coal sebagai sumber bahan bakar. Co-pirolisis dilakukan dengan empat variasi laju pemanasan yaitu 10, 15, 20 dan 25 ºC/menit menggunakan Thermogravimetric Analyzer (TGA). Rentang suhu reaksi co-pirolisis aktif Botryococcus braunii dan Victorian brown coal berkisar antara 155,79 ºC hingga 545,27 ºC yang terjadi dalam tiga tahapan. Tahapan pertama adalah penguapan air dan senyawa volatil (20-200 ℃), tahapan kedua yaitu co-pirolisis aktif (250-500 ℃) dan tahapan ketiga yaitu dekomposisi lignin dan senyawa karbon yang terkandung dalam campuran mikroalga dan batubara (500-800 ℃). Kata Kunci: co-pirolisis,TGA, Botryococcus braunii, Victorian brown coal
PIROLISIS MIKROALGA BOTRYOCOCCUS BRAUNII DENGAN VARIASI LAJU PEMANASAN MENGGUNAKAN THERMOGRAVIMETRIC ANALYSER Siti Aminah; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo; Rudy Agung Nugroho
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Pirolisis mikroalga Botryococcus braunii dengan Thermogravimetric Analyzer (TGA) telah dilakukan. Penelitian ini bertujuan untuk mempelajari karakteristik dan potensi mikroalga B. braunii sebagai sumber energi terbarukan melalui proses pirolisis. Pirolisis dilakukan dengan empat variasi laju pemanasan yaitu 10, 15, 20 dan 25 °C/menit. Berdasarkan hasil karakterisasi, B. braunii memiliki kadar air 5,01 ± 0,42%, kadar abu 27,44 ± 1,11%. Kurva TG dan dTG pirolisis B. Braunii menunjukan rentang suhu untuk reaksi pirolisis aktif mikroalga B. braunii adalah antara 150 – 550 °C, dimana terjadi proses degradasi biomassa yang terdiri dari dekomposisi karbohidrat, protein dan lipid. Kata Kunci: Botryococcus braunii, Pirolisis dan Analisis Termogravimetri
Aktivasi Deoiled Spent Bleaching Earth (DSBE) dengan Menggunakan Metode Ultrasonik untuk Mengadsorpsi Ion Logam Pb2+ Helbianurramdan Helbianurramdan; Noor Hindryawati; RR Dirgarini Julia Nurlianti Subagyono
JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Spent bleaching earth (SBE) as adsorbent of Pb2+ ion, through oil extraction process and continued by acid activation has been studied, this process assisted by ultrasonic wave in 30, 60 and 90 minutes reaction time. Based on the results analysis of X-Ray Flourescence (XRF), the reaction time of 30, 60 and 90 minutes showed an increase of SiO2 were 37.802 %, 42.374 % and 38,793 %. From the surface area with method methylene blue adsorption showed the surface area of DSBE-A 30, 60 and 90 were 34.3057 m2/g, 36.3375 m2/g and 35.8893 m2/g, respectively. XRD analysis showed the type of DSBE-A 60 was rectorite mineral with chemical compound was Na.Al4(Si,Al)8.O20.(OH)4.H2O and has a crystallinity 53.93%. Optimum conditions of DBSE-A 60 to adsorb Pb2+ ion in contact time was at 80 minutes, pH 3 and 20 ppm of Pb2+ ion concentration with adsorbtion efficiency up to 46.04 % and the optimum capacity of DSBE-A 60 to adsorb Pb2+ ion was 0.9209 mg/g.
SINTESIS DAN KARAKTERISASI MATERIAL SILIKA MESOPORI SBA-15 DENGAN ULTRASONIC ASSISTED SOL-GEL METHOD MENGGUNAKAN PELARUT ASAM ASETAT Siti Sarah; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Synthesis and characterization of mesoporous silica material SBA-15 with ultrasonic assisted sol-gel method using acetic acid solvent has been conducted. The mesoporous silica material SBA-15 was characterized by N2 adsorption/desorption Analysis, Small Angle X-Ray Diffraction (SAXRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR). SBA-15 material resulted from the calcination method for template removal has a surface of 876 m2/g, a pore volume of 5,1 cm3/g and a pore diameter of 1,13 nm. The SAXRD pattern of SBA-15 showed three distinctive peaks with Miller indeces of 100, 110 and 200 respectively. The morphology of the SBA-15 material has the form of aggregate particles with a reguler cylindrical structure on the particles. Infrared spectra of SBA-15 showed the presence of functional groups, namely Si-O-Si, Si-OH and –OH. Keywords: Mesoporous silica, SBA-15, sonication
STUDI PIROLISIS AMPAS TEBU DENGAN MENGGUNAKAN INSTRUMEN PYROLYSIS-GAS CHROMATOGRAPHY-MASS SPECTROMETRY (Py-GC/MS) Nana Lestari; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A pyrolysis study of a bagasse using a pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) instrument was carried out. This research was conducted to determine the chemical and physical characteristics of bagasse and to determine the chemical composition of the pyrolysis products of bagasse. Pyrolysis of biomass were carried out at three temperatures, namely 350°C, 450°C and 550°C. Bagasse had a moisture content of 12 ± 0.004%, ash content 2.43 ± 0.001%, cellulose content 58%, lignin content 11 ± 0.02% and 10% hemicellulose content. Based on the percent product area in the pyrogram, bagasse pyrolysis products contained lignin derivative products (16-23%) and cellulose/hemicellulose derivative products 61-66%. Keywords: Pyrolysis, Py-GC/MS, Bagasse
PIROLISIS SERBUK KAYU ULIN (Eusideroxylon zwageri) DENGAN INSTRUMEN PYROLYSIS-GAS CHROMATOGRAPHY-MASS SPECTROSCOPY Sri Astika Putri; RR Dirgarini Julia Nurlianti Subagyono; Rahmat Gunawan
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Pyrolysis of Ulin sawdust (Eusideroxylon zwageri) with pyrolysis-gas chromatography-mass spectroscopy (Py-GC/MS) instrument haw been performed. This study was conducted to determine the chemical composition resulting from the pyrolysis process of Ulin sawdust (Eusideroxylon zwageri) using the Py-GC/MS instrument. Pyrolysis was performed at a temperature of 350 oC, 450 oC and 550 oC under the flow of helium gas (He). The chemical composition of the product resulting from the pyrolysis process of Ulin sawdust was lignin derivative products of 56-73%, cellulose/hemicellulose derivative products of 17-22%. The pyrolysis products with the highest per cent were Phenol,4-ethenyl-2,6-dimethoxy-; .beta.-D-Glucopyranose,1,6-anhydro; and isoelemicin. Keywords: Pyrolysis, Eusideroxylon zwageri, Py-GC/MS
PIROLISIS SERBUK KAYU MERANTI (SHOREA) DENGAN INSTRUMEN PYROLYSIS-GAS CHROMATOGRAPHY-MASS SPECTROSCOPY Miranda Miranda; RR Dirgarini Julia Nurlianti Subagyono; Rahmat Gunawan
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A study on the pyrolysis of meranti (Shorea) sawdust using a pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) instrument was carried out. This research was conducted to determine the chemical and physical characteristics of meranti (Shorea) sawdust and to determine the chemical composition of the meranti (Shorea) pyrolysis product. Pyrolysis was carried out with three different temperature variations, namely 350°C, 450°C and 550°C. Meranti wood powder (Shorea) has a moisture content of 12±0.001%, an ash content of 0.07±0.017%, a -cellulose content of 66%, a lignin content of 35±0.047% and a hemicellulose content of 2%. Based on the percentage of product area in the pyrolysis pyrolysis, meranti (Shorea) sawdust contains lignin derivative products (29-50%) and cellulose/hemicellulose derivative products (7-17%). The pyrolysis product with the highest percent area was carbamic acid monoammonium salt. (E)-2,6-Dimethoxy-4-(prop-1-en-1-yl)phenol. Phenol, 4-ethenyl-2,6-dimethoxy-. Acetic acid. Ammonium acetate. Butanenitrile, 3-oxo- and Beta.-D-Glucopyranose, 1,6-anhydro. Keywords: Pyrolysis, Py-GC/MS, Meranti wood powder (Shorea)
PIROLISIS SABUT KELAPA (Cocos nucifera L) MENGGUNAKAN INSTRUMEN PYROLYSIS-GAS CHOMATOGRAPHY/MASS SPECTROMETRY (PY-GC/MS) Noor Afdaliah; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Pyrolysis of a coconut (Cocos nucifera L) husk using a pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) instrument was carried out. This research was conducted to determine the chemical composition of pyrolysis of a coconut husk at temperaturs of 350, 450 and 550 °C. Pyrolysis of coconut husk produced lignin derivative products by 15-32% and cellulose/hemicellulose derivative products 9-34%. The gas product produced in the co-pyrolysis of a mixture microalgae anda coconut fiber is 41-50%. Pyrolysis product with the highest % area, namely methyl alcohol, 2-butanone, phenol, benzofuran, 2,3-dihydro- dan 2-methoxy-4-vinylphenol Keywords: Co-pyrolysis, Py-GC/MS dan coconut husk
Co-Authors Helbianurramdan Helbianurramdan Miranda Miranda Nana Lestari Noor Afdaliah Noor Hindryawati Rahmat Gunawan Rudy Agung Nugroho Siti Sarah Sri Astika Putri Veliyana Londong Allo Wardina Masdalifa