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All Journal Jurnal Natur Indonesia Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam ALCHEMY Jurnal Penelitian Kimia IJEBA (International Journal of Economic, Business & Applications) JURNAL PHOTON Acta Biochimica Indonesiana Jurnal Inovasi Pendidikan dan Sains Dinamika Lingkungan Indonesia Jurnal Teknik Kimia USU
Amir Awaluddin
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, University Of Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Nursing Physics Social Sciences

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STUDI PRODUKSI ASAM LEVULINAT DARI PATI UBI GAJAH (Manihot esculenta) MENGGUNAKAN KATALIS ASAM SULFAT Wisnu Aditya; Amir Awaluddin; Saryono '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

The utilization  of  Manihot esculenta  to produce  platform chemical such as    levulinic acid  (LA)    has  been  studied    in  detail to  optimize    the  LA  production. The  LA production from  Manihot esculenta  was  monitored  using    reaction times  of  the hidrolysis reaction (3-85 min.),    the reaction temperatures  (150˚C, 170˚C,  and 190˚C), and  concentrations  of sulfuric acid as the catalyst  (1%,  3%,  and 5%).  The  products obtained  were  then  characterized using  high performance  liquid  chromatography (HPLC)    to determine the contents of gl ucose,  hydroxymethylfurfural  (HMF)    and LA. The result showed that  the LA production increased with  the  rise    of temperature  and catalyst concentration, whereas the    glucose and HMF  production decreased with    the rise  of temperature and catalyst concentration. The highest  production    of LA reached approximately 50% (based  on initial concentration of biomass) at reaction temperature of 170˚C and 5% of sulfuric acid concentration for 70 minutes of reaction time.
PREPARASI MANGAN OKSIDA HASIL PERTUKARAN KATION Mg 2+ DENGAN K-BIRNESSITE YANG DISINTESIS MENGGUNAKAN REDUKTOR MALTOSA Anna Ridha Utami; Amir Awaluddin; Pepi Helza Yanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Todorokite is a naturally occurring manganese oxides having tunnelled structure (3x3) with pore size of 6,9 Å. This type of manganese oxide could be synthesized from birnessite precursor by reflux method. The exchangeable cation K + in interlayer of birnessite can be replaced with Mg 2+ ions to produce a Mg-birnessite, which then could be converted into todorokite through calcination. The products were then characterized by X-ray Powder Diffraction (XRD) to determine their phases, crystallinity and purity. Data from Absorption Atomic Spectroscopy (AAS) indicated that the 70,63% replacement of K + with Mg 2+ was achieved within contact time of 14 h. Analysis for todorokite have been done with different contact time of 18, 20 and 24 hours. The results of XRD showed that the main phases were birnessite with todorokite as minor product that was obtained at reaction time of 20 hours.
KORELASI GEOKIMIA MOLEKULER MINYAK BUMI PETAPAHAN-KAMPAR DENGAN SUMUR MINYAK BUMI LANGGAK, PENDALIAN ROKAN HULU, RIAU Rita Marlina; Emrizal Mahidin Tamboesai; Amir Awaluddin
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

To date, crude oil  has been  the main energy resources  for  industry, transportation and household needs. The demand for crude oil in Indonesia is much higher than its production which leads to current energy crisis. One of solutions for this crisis is to conduct correlation study, which determines the genetic relationship at each oil well. The correlation study of crude oil  in Petapahan Kampar with Langgak and Pendalian Rokan Hulu has not been conducted previously. This study could assist to provide the indication of the genetic relationship, deposition zone, souce rock and the origins of Petapahan, Langgak and Pendalian’s crude oil. The crude oil samples taken  from oil wells was firstimmediately refrigerated before conducting geochemistry analysis. The samples were then fractionated by column to separate saturated fraction. This fraction was analyzed using Gas Chromatography (GC). On the basis of the abudance of hydrocarbon aliphatic, the crude oils samples  have small ratio value, which  are  0,44-0,55 for Pr/n-C17 and 0,20-0,26 Ph/n-C18. This values indicated that the samples were originated from higher vascular plants (terrestrial). The samples derived from lacustrine environments (lake) have ratio value of Pr/Ph (2,14-2,39). The calculation from Star diagram have showed that the samples of production oil field in Petapahan 19, Petapahan  23, Langgak 016  are positively correlated , whereas the oil samples in area 03  are negatively correlated. The positive correlation indicated that the samples have the genetic relationship at each oil, a same  source matter, and same the original.
PREPARASI MANGAN OKSIDA HASIL PERTUKARAN KATION Mg 2+ DENGAN K-BIRNESSITE YANG DISINTESIS MENGGUNAKAN REDUKTOR GLUKOSA Afra Juwita; Amir Awaluddin; Akmal Muchtar
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Todorokite is a family of tunneled manganese oxide with 3x3 tunnel framework. It could beprepared through a precursor Mg-birnessite by reflux method. In this study, K-birnessite was prepared by ceramic routes using glucose as reducing agent. K-birnessite was then ion-exchanged with Mg 2+ to form Mg-birnessite. The typical reaction conditions for ion-exchanged K + with Mg 2+ were as follows: contact times of 10, 12, 14, 16 and 18 hours with 16 hours for the optimum replacement ion K + with ion Mg 2+ . The total replacement of ion K + by ion Mg 2+ was 94,32%. Data from the X-ray diffraction pattern showed the formation of todorokite at 2Ө = 9,02o with d-spacing 9,79Å, but the peak for K-birnessite also appeared at an angle 2Ө = 12,57o with d-spacing 7,03Å. Thermal analysis of Mg-birnessite was observed by TG-DTA curve that showed the weight loss of Mg-birnessite about 20%. DTA curve also showed endotermic peak at 900oC, which indicated the transformation phase from layered to tunneled structure.
ANALISIS SIFAT-SIFAT PERMUKAAN BIRNESSITEYANG DIPREPARASI DARI DUA AGEN PEREDUKSI BERBEDA Hartini Azhar; Amir Awaluddin; Akmal Muchtar
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

The layered manganese oxides having birnessite structure have been successfully synthesized using the two different types of reducing agents by solid-state ceramic method.  The reducing agent used  in  this  study was  oxalic acid and glucose.  Birnessite synthesized has been characterized using XRD, SEM and methylene blue adsorption. The XRD results indicated that the two types of reducing  agents produced mainly birnessite phases with different crystallinity .Birnessites  synthesized from two reducing agents have different surface properties as indicated from data of SEM and methylene blue adsorption.
STUDI XRD MANGAN OKSIDA BIRNESSITE YANG DIPREPARASI MELALUI METODE SOL-GEL DAN KERAMIK Dian Anggraini; Amir Awaluddin; Pepi Helza Yanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Birnessite  is a naturally occurring layered manganese oxide found as a manganese nodules  in sea floor or    soil deposit. In this study, birnessite was synthesized  using two types of methods, solid state ceramic  approach and sol-gel reaction both KMnO4 and maltose were used as reactants in these two methods.  The products were then characterized using XRD for determination of phases, crystallinity and purity. The results showed  the both techniques lead to  the  formation of birnessite with different crystallinity and purity. The ceramic method produced  more crystalline and pure birnessite than that of sol-gel.  The typical reaction parameters for the synthesis birnessite by the ceramic method were 3:1 mole ratio (KMnO4over maltose) calcination at  700o C for 7 hours with  the  93,7%  purity  of  birnessite. However,  by  the sol-gel  method birnessite  produced only  31,8%  with the following condition  4:1 mole  ratio (KMnO4 over maltose) and calcination temperature of 450o C for 2 hours.
Effectiveness of crude oil degrading fungi isolated from petroleum hydrocarbon contaminated soil in Siak, Riau Endang Maya Sari; Riryn Novianty; Amir Awaluddin; Saryono; Nova Wahyu Pratiwi
Acta Biochimica Indonesiana Vol. 2 No. 1 (2019): Acta Biochimica Indonesiana
Publisher : Indonesian Society for Biochemistry and Molecular Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32889/actabioina.v2i1.35

Abstract

Background: Biodegradation of petroleum hydrocarbon needs a specific technique called bioremediation to remove the environmental pollutants. Several indigenous microorganisms including fungi, bacteria, and actinomycetes are effective agents in degrading petroleum derivatives, aliphatic and polyaromatic hydrocarbons (PAHs). Objective: This research aimed to investigate indigenous fungi isolates from petroleum hydrocarbon contaminated soil in Siak which are capable to degrade hydrocarbon. Methods: The competence of indigenous fungi was isolated from a crude oil-contaminated soil which collected from one of oil-field in Siak, Riau. The effectiveness of isolates on the degradation crude oil was tested by culturing the isolates in Bushnell-Haas broth containing crude oil (5% v/v) for 16 days. A decrease in pH, change in optical density and amount of CO2 released were recorded to indirectly indicate the crude oil degradation by the fungi. To measure the percentage of crude oil biodegradation, gravimetric analysis was utilized. Results: The two colonies were selected and identified as Aspergillus sp LBKURCC151 and Penicillium sp LBKURCC153. The results showed that Aspergillus sp LBKURCC151 reached a higher level (61%) of biodegradation after 16 days under the optimum conditions in degrading total petroleum hydrocarbon than Penicillium sp LBKURCC153 (46%). Conclusion: These results indicated that Aspergillus sp LBKURCC151 and Penicillium sp LBKURCC153 are potential degraders for bioremediation in crude oil-contaminated area.
OPTIMASI PERTUMBUHAN ISOLAT FUNGI INDIGEN Penicillium sp. LBKURCC153 PENDEGRADASI NAFTALENA MENGGUNAKAN GLUKOSA SEBAGAI KOSUBSTRAT PADA MINIMAL MEDIUM Aisyah Fitrida; Riryn Novianty; Saryono Saryono; Amir Awaluddin; Nova Wahyu Pratiwi
JURNAL INOVASI PENDIDIKAN DAN SAINS Vol 1 No 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Nahdlatul Wathan Mataram

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Abstract

Naftalena merupakan salah satu polutan yang sulit untuk didegradasi karena termasuk kedalam kelompok PAH dan bersifat karsinogenik. Tujuan dari penelitian ini adalah untuk menguji efektifitas isolat fungi indigen dari Provinsi Riau untuk mendegradasi senyawa toksik naftalena dengan penambahan glukosa sebagai kosubstrat pertumbuhan. Degradasi naftalena oleh isolat fungi dipengaruhi oleh beberapa parameter, diantaranya biomassa, pH dan persentase degradasi yang diukur pada 0, 4, 8, 12 dan 16 hari inkubasi. Berdasarkan dari parameter biomassa isolat fungi Penicillium sp. LBKURCC153 mengalami fase eksponensial sampai hari ke-16. Pada fase eksponensial terjadi pertambahan jumlah sel secara maksimum yang menunjukkan respon positif terhadap penggunaan glukosa dan naftalena sebagai sumber karbon dan energi. Isolat mengalami penurunan pH dari 7 sampai 3,8 yang artinya ada aktivitas pertumbuhan yang menghasilkan asam-asam organik dari proses degradasi naftalena. Isolat juga mampu mendegradasi naftalena sebesar 27,5% oleh Penicillium sp. LBKURCC153 pada media dengan penambahan glukosa pada waktu optimum selama 4 hari inkubasi. Kesimpulannya, penambahan kosubstrat glukosa dapat meningkatkan persentase degradasi naftalena oleh Penicillium sp. LBKURCC153
Sintesis Katalis Fe/SOD Berbasis Lempung Alam Maredan Untuk Mendegradasi Zat Warna Metilen Biru Elis Damayanti; Amir Awaluddin; Muhdarina Muhdarina
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 1 (2022): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.1.47874.122-129

Abstract

Zeolit merupakan material yang sangat aplikatif yang dapat disintesis dengan bahan baku yang kaya akan silika ataupun alumina. Lempung Maredan termasuk sumber daya alam Riau yang mengandung silika dan alumina dan telah diubah menjadi zeolit jenis sodalit (SOD). Namun, sodalit yang dihasilkan masih memiliki kristalinitas rendah dan belum diujiaplikasikan. Dalam penelitian ini, SOD disintesis and dilanjutkan dengan impregnasi Fe menggunakan prekursor Fe(NO3)3.9H2O dan kalsinasi pada 400 °C selama 4 jam. Padatan yang terbentuk dikarakterisasi secara XRD, EDX dan FTIR untuk menentukan struktur, kristalinitas, ukuran kristal, jumlah Fe yang terimpregnasi serta pita vibrasi Fe. Padatan ini diperankan sebagai katalis untuk degradasi zat warna metilen biru. Hasil karakterisasi menunjukkan bahwa material baru yang terbentuk adalah mineral SOD dan hematit. Kristalinitas SOD dan SOD dalam Fe/SOD berturut-turut 49,62% dan 25,49% dengan ukuran kristal masing-masing 52,50 nm dan 4,40 nm. Keberhasilan impregnasi dibuktikan oleh analisis EDX dengan meningkatnya jumlah atom Fe pada Fe/SOD dari 1,46% hingga 22,80% serta munculnya pita vibrasi FeO dan Al‒Fe‒OH masing-masing pada bilangan gelombang 430 ‒ 470 cm-1 dan 3640 ‒ 3660 cm-1 berdasarkan analisis FTIR. Katalis Fe/SOD mampu mendegradasi zat warna metilen biru sebanyak 98,80% dalam waktu 10 menit dengan dosis katalis 0,5 gL-1.Synthesis of Fe/SOD Catalyst Based on Maredan Natural Clay to Degrade Methylene Blue Dye. Zeolite is a highly applicable material that can be synthesized using silica or alumina-rich raw materials. Maredan clay is one of Riau's natural resources, which contains silica and alumina and has been converted to zeolite sodalite (SOD). However, the resulted sodalite still possesses low crystallinity and has not been tested. In this study, SOD was synthesized and was followed by the impregnation of Fe using Fe(NO3)3.9H2O as a precursor and calcination at 400 °C for 4 hours. The solid formed was characterized by XRD, EDX, and FTIR to determine the structure, crystallinity, crystal size, amount of impregnated Fe, and vibration band of Fe. The solid was then used as the catalyst for methylene blue degradation. The characterization result indicated that the newly formed materials were composed by SOD and hematite. The crystallinity of SOD and SOD in Fe/SOD were 49.62% and 25.49% respectively, with the crystal size of 52.50 nm and 4.40 nm, respectively. The impregnation result was confirmed by EDX analysis marked by the increase of the number of Fe atoms in Fe/SOD from 1.46% to 22.80%, as well as the presence FeO and Al‒Fe‒OH vibration bands at the wavenumbers of 430 ‒ 470 cm-1 and 3640 ‒ 3660 cm-1, respectively, based on FTIR analysis. The Fe/SOD catalyst was able to reduce of methylene blue dye by 98.80% for 10 minutes with the catalyst dose of 0.5 gL-1.
PENGARUH SUHU PADA PROSES PENGOMPOSAN PELEPAH SAWIT MENGUNAKAN ISOLAT LOKAL Pseudomonas stutzeri (LBKURCC 54 DAN LBKURCC 59) Suci Apriani; Amir Awaluddin; - Saryono
Sistem Informasi Vol 6 No 01 (2015): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v6i01.474

Abstract

Saat ini, pelepah kelapa sawit merupakan limbah pertanian yang belum dimanfaatkan secara optimal. Pada penelitian ini, limbah pelepah kelapa sawit dikonversi menjadi kompos dengan cara fermentasi. Proses pengomposan dilakukan menggunakan kombinasi bioaktivator lokal ditambah kotoran ayam yang berfungsi menyediakan nutrisi bagi bioaktivator. Bioaktivator sebagai starter yang digunakan merupakan kombinasi dari dua Isolat yaitu Pseudomonas stutzeri (LBKURCC 54 dan 59) yang disubkultur pada Nutrient Broth dan difermentasi selama 7 hari menggunakan media bibit. Substrat diinokulasi 10 % starter dari total bahan. Untuk mempelajari kemampuan bioaktivator lokal dalam mendegradasi pelepah kelapa sawit dilakukan variasi sebagai berikut: (1) sampel dengan dan tanpa starter (2) sampel dengan dan tanpa pembalikan. Kualitas kompos terbaik yang dihasilkan dari sampel yang menggunakan starter dengan pembalikan tiga hari sekali. Nilai rasio C/N yang merupakan indikator penentu kematangan kompos, menurun hingga akhir pengomposan dan telah sesuai dengan standar SNI yaitu 13,46.
Co-Authors ', Itnawita ', Padil ', Wahyuni - Hafizhah -, Presetya - Adrianto Ahmad Adrianto Ahmad Afra Juwita Aisyah Fitrida Akmal Muchtar Aman Aman Aman Aman Amilia Linggawati Anna Ridha Utami Arif Kurnia Dian Anggraini Edy Saputra Elis Damayanti Emrizal Mahidin Tamboesai Endang Maya Sari Erwin Amiruddin Hafizhah, - Hartini Azhar Hasan Yilmas Irawati Suherman Itnawita ' M. Zulfikri Mokhamad Subkhan Monita Olivia Muhammad Rizki Muhdarina Muhdarina Nova Wahyu Pratiwi Nova Wahyu Pratiwi Nova Wahyu Pratiwi Novianty, Riryn Pepi Helza Yanti Pepi Helza Yanti Presetya - - Riryn Novianty Riska Anggraini Riska Anggraini, Riska Rita Marlina Rosa Murwindra, Rosa Rudi Rahmadi Saryono Saryono Saryono ' Saryono, M.Or. S.Pd. Jas. Siregar, Siti Saidah Siti Saidah Siregar Slamet Wahyuningsih Sri Nelvia Subkhan, Mokhamad Suci Apriani Suci Apriani Wisnu Aditya Zulfan Saam Auzar