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All Journal Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam JURNAL PHOTON
Akmal Muchtar
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Agriculture, Biological Sciences & Forestry Chemistry Mathematics Nursing Physics

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PENGGUNAAN ZEOLIT ALAM TERAKTIVASI PADA PERBAIKAN KUALITAS MINYAK JELANTAH Ningsih, Aswita Wirda; Tamboesai, Emrizal Mahidin; Muchtar, Akmal
Sistem Informasi Vol 6 No 01 (2015): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

Dalam proses belajar mengajar, konsentrasi menjadi salah satu faktor utama yang mempengaruhi hasil pembelajaran seperti penyerapan materi pelajaran. Konsentrasi menjadi terganggu jika terjadi gangguan akibat faktor–faktor lingkungan, salah satunya adalah kebisingan. Tujuan dari penelitian ini adalah memetakan tingkat kebisingan di Komplek Perguruan Muhammadiyah Kota Pekanbaru dan mengetahui faktor-faktor apa yang mempengaruhi kebisingan. Metode yang digunakan dalam penelitian ini adalah penelitian survei yang bersifat deskriptif yaitu untuk mengetahui gambaran tentang tingkat kebisingan pada Komplek Perguruan Muhammadiyah di Kota Pekanbaru dengan melakukan pengukuran tingkat kebisingan. Hasil penelitian menunjukkan bahwa Komplek Perguruan Muhammadiyah di Kota Pekanbaru memiliki tingkat kebisingan sebesar 69 dB (A) pada jam belajar dan 54,1 dB (A) pada malam hari. Hasil dari pemetaan intensitas kebisingan pada jam belajar menunjukan tingkat kebisingan tertinggi menyebar dari timur menuju ke barat lokasi penelitian, sedangkan pada malam hari menunjukan tingkat kebisingan tertinggi menyebar dari tenggara menuju ke barat lokasi penelitian dan pusat kebisingan berasal dari jalan KH. Ahmad Dahlan.
PENINGKATKAN KUALITAS MINYAK GORENG CURAH MENGGUNAKAN ADSORBEN LEMPUNG DESA GEMA TERAKTIVASI Sophia, Halida; Muchtar, Akmal; Sari, Martha
Sistem Informasi Vol 5 No 1 (2014): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

Telah dilakukan penelitian tentang peningkatan mutu minyak goreng curah menggunakan adsorben lempung asal Desa Gema, Kabupaten Kampar, Provinsi Riau. Penelitian ini meliputi: (1) Pembuatan adsorben dengan aktivasi menggunakan H2SO4 0,5 M, selama 3 jam dengan kecepatan pengadukan 500 rpm (2) Pemurnian minyak goreng secara adsorbsi dan mengetahui mutu minyak curah setelah adsorbsi berupa bilangan peroksida, bilangan asam, kandungan air, warna. Proses adsorpsi diamati dengan variasi massa (1, 3, 5, dan 7 gram) dengan waktu kontak 30 menit. Semua nilai yang diperoleh dibandingkan dengan SNI 3741:2013. Hasil yang didapat menunjukkan lempung teraktivasi H2SO4 mampu menurunkan bilangan peroksida, bilangan asam, dan kandungan air secara maksimal masing-masing sebesar 31,02%, 36,36%, dan 38,89% dengan 7 gram lempung teraktivasi.
PEMANFAATAN LEMPUNG DESA GEMA TERAKTIVASI H2SO4 UNTUK PENINGKATAN MUTU MINYAK GORENG CURAH Simanjuntak, Martha Sari; Muchtar, Akmal; Sophia, Halida
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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Clay from Gema Village, Kampar Regency, Riau Province has been applied as an adsorbent. The increase of clay’s adsortive capacity can be done by modification. This study was aimed to use the activated clay to improve the quality of bulk cooking oil. The adsorbent preparation was began with activation process by using 0,5 M H2SO4, for 3 hours, and stirring rate 500 rpm. Activated clay showed the increase the intensity of quartz and montmorillonit, and accompanied by the loss of muscovite and kaolinite. The parameters that were used in this study were peroxide value, acid value, water content, odor, and colour. Adsorption process was observed in 7 gram activated clay with various contact time (30, 60, 90, and 120 minutes), the results then compared with SNI 3741:2013. The obtained result showed that the activated clay 0,5 M H2SO4 was able to decrease the acid value, and water content, respectively 54,55%, 48,75% with 120 minute and 7 gram weight of activated clay, it was also able to decrease peroxide value 39,64% with 60 minute and 7 gram weight of activated clay, and the color of bulk cooking oil was more clear, but it’s smells like clay.
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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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.
PEMANFAATAN LIMBAH AMPAS TEBU SEBAGAI ADSORBEN UNTUK PENINGKATAN KUALITAS AIR GAMBUT Patricia Lucky Yoseva; Akmal Muchtar; Halida Sophia
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

Sugarcane bagasse contains various biomass compounds, like cellulose and lignin,which has the potential to be converted into a source of carbon for the adsorption process. This study was aimed to use carbonized bagasse powder as an adsorbent toincrease quality of peat water. Bagasse powder was carbonizied at 300 o C for 2,5 hoursand sieved using a sieve storied 100 and 200 mesh. Carbonizied bagasse powder wascharacterize in terms of moisture content, ash content, I 2 adsorption capacity, surfacearea and functional groups determination using FTIR. Adsorption process was observedby mass variations (0,5; 1; 1, 5; 2 grams) then at the mass maximum (2 gram) wascontinued by contact time variations (30, 60, 90, 120 minutes). Parameters of this studywere analyzed such as odor, colour, pH, turbidity, TDS, TSS, metal content of Fe andhumic acid in peat water. All of the results were compared to PERMENKES RI “AboutRequirement and Water Quality Control” No.416/MENKES/PER/IX/1990. The analysisresult showed that variation of contact time does not affect all parameters that have beenanalyzed. After compared to PERMENKES RI only odor, turbidity, TDS, content of Fe(2 grams; 120 minutes) fulfilled the standar, respectively (18,2 NTU; 54,15%),(98 mg/L; 52,65%), and (0,128 mg/L; 52,65%).
PEMANFAATAN LEMPUNG DESA GEMA TERAKTIVASI H 2SO 4 UNTUK PENINGKATAN KUALITAS AIR GAMBUT Vina Rotua; Akmal Muchtar; Halida Sophia
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

The clay found in Gema  Village, Kampar  Regency, Riau  Province  contains  many minerals, such as montmorillonite but it has a low surface area so need to do activation. The activator used in this study was  H2SO4 0,5 M solution. The adsorbent  was characterized by XRD, SEM and FT-IR. Activated Gema clay (LGT) and  unactivated Gema clay (LGTT) were applied for  purification a  peat water  using batch method with the  variation of  time 30, 60, 90 and 120 minute  and  several of water parameters were analized, such as odor, colour, pH, turbidity, TSS, TDS, concentrations of iron (Fe) and efficiency  of decreasing  of  colour. All the results  were compared  to  PERMENKES RI No. 416/MENKES/PER/IX/1990 “Tentang Syarat-Syarat Dan Pengawasan Kualitas Air”.  Activated  clay  showed the  refined morfology and increased which  surface area from 10,5813  m2g-1 up to 15,3337  m2g-1.  The  result  showed  that the  adsorption  using activated Gema clay is better than  unactivated Gema clay  that is showed from removal efficiency percentage for all parameters. The longer  of adsorption time, that was so many adsorbate that was adsorbed by adsorbent.  The maximum time  of  adsorption  was 120 minute. The  removal efficiency percentage  for pH, turbidity, TSS, TDS and efficiency of decreasing  of  colour were 10,03%, 30,98%, 58,59%, 59,28% and 30,84%, respectively for activated Gema clay (LGT).  The statistic result showed that the variation of adsorption time affect all parameters that  was  analyzed based on the analysis of variance (ANOVA) and Duncan’s test at α = 0,05.
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.
Co-Authors Afra Juwita Amir Awaluddin Emrizal Mahidin Tamboesai Halida Sophia Hartini Azhar Martha Sari Martha Sari Simanjuntak Ningsih, Aswita Wirda Patricia Lucky Yoseva Vina Rotua