', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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PENENTUAN KALOR DARI CAMPURAN ARANG TEMPURUNG KELAPA DENGAN CANGKANG KELAPA SAWIT DI TINJAU DARI PERBANDINGAN CAMPURANNYA Pandra, Doni; ', Sugianto; Ginting, Maksi
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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A research has been  carried  to determine the  calory  value of the  mixture of  coconut charcoal and palm oil shells  using an  experimental method. This experiment used a bomb callorimeter  to measure the physical parameters  of the sample (callory value, sulfur  total, total ash  and total moisture  of  content). Each sample was  treated  by  the same pressure and volume.  The samples  were  taken from two different materials, namely  charcoal  of  coconut shells  and oil palm shells.  Four different samples  were made from  combination of  grain size  ratio  of 60  :  40 and 40 : 60.  The sample  A and C  were mixture of  coconut shell charcoal  and  charcoal oil palm shells  with  60: 40 ratio, while the sample B and D were mixture of coconut shell Charcoal and charcoal oil palm shells for 40: 60 ratio. Results of the test showed the value of the physical parameters i.e callory value, sulfur  total, total ash and total moisture of content respectively  for the sample A  were  6.379  calories cal/g, 0.18%, 1.43%, and  8.00%,  for  the sample B  were 5.732 calories cal/g, 0.22%,  1.30% and  8,48 %,  for  the sample C were  5.787 cal/g, 0.20%,  10,91%, and 7.19%,  and  for  the  sample  D  were  5.395 calories cal/g, 0.20%, 11.24%, and 7,07%.  The sample  A  had  larger  grain density so that the  grain samples were  more solid.  The denser  of the material was  the higher the value of the heat from the charcoal.  From the overall data  obtained, it was  indicated  that  the sample  A had the highest quality value compared to the other samples.
PENENTUAN NILAI KALORI DETRITUS HUTAN MANGROVE DENGAN MENGGUNAKAN BOMB CALORIMETER Andi, Pos; ', Sugianto; Emrinaldi, Tengku
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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A  research  has  been conducted to determine a  calorie  quality    of mangrove detritus using Bomb  Calorimeter. The measurements  were carried out in  order to measure the physical parameters,  such as water content,  concentration of  ash, amount  of sulfur, and calorie content. Each sampel was treated on the same pressure and volume. The sampleswere taken from Dumai city on five different regions. Quality test  to the  samples resulted calorie content of 4.185 cal/g, the degree of water of 14,29 %, the  degree of ash of 4.48 % and the amount of sulfur of 0,03  %  for sample of point A.  Meanwhile for point B, C, D, and E, the value of calorie content, degree of water, degree of ash, and degree of sulfur were 4.195 cal/g, 4.139 cal/g, 4.164 cal/g, and 4.002 cal/g,  13,90 %, 14,30 %, 13,10 %,  and 13, 80 %, 4,84 %, 5,45 %, 4,59 %, and 6,10 %, and 0,11 %, 0,11 %, 0,15 %,  and  0,19 %, respectively . Among the four  physical parameters, calorie content is the most  important parameter to indicate the quality of detritus of mangrove. Based on the obtained data, the sample  of point B was the best sample  because of its highest calorie content compared to the other samples.
PENENTUAN SIFAT LISTRIK AIR PADA WADAH ALUMINIUM DAN BESI BERDASARKAN PENGARUH RADIASI MATAHARI Syetiawan, Yusuf; ', Sugianto; Syech, Riad
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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A  research has been conducted  to  determine  the electrical properties  of water  in  an aluminum and  iron  containers.  The  waters  used  were  well  and  rain  water using  metaland  aluminum  containers.  This research was conducted  using  an experimental method. The results showed  that  the  best  electrical properties  was  found from  rain  water  in the aluminium  container  with its  resistivity  of  18.294m ,  electrical  power  of  0.00046  W, electrical energy  of  2,941  J  and  electrical  conductivity  of  0.055  (1)m.  The  resultsindicated  that  greater  solar radiation  in  the  water  could  produce  of  electrical properties greater  than  that  of water  on  the electrical  properties of  the electrical  resistivity.The affecting factor of electrical  properties of  the rain  water  was  concentration  of  Fe  and  Cu. The  concentrations  of  Fe  and  Cu  in  rain  water  was  0,065  ppm  and  0,050  ppm.  It was also found that  the smaller  the  concentrations of  Fe  and  Cu  levels  in  solution  was  the purer the solution.
RANCANG BANGUN ALAT PENJERNIH AIR YANG TERCEMAR LOGAM BERAT Fe, Cu, Zn DALAM SKALA LABORATORIUMRANCANG BANGUN ALAT PENJERNIH AIR YANG TERCEMAR LOGAM BERAT Fe, Cu, Zn DALAM SKALA LABORATORIUM Syahputra, Andi; ', Sugianto; Syech, Riad
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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A research on design and construction of purification equipment of water contaminated by heavy metals Fe, Cu, and Zn was carried out. The equipment was utilized to purify water sample of Siak River at a distance of 1m from the PT. RICRY of rubber industry in Pekanbaru. Analysis was performed by using Atomic Absorption Spectrophotometer (AAS). The analysis results showed that the concentration of Cu, Fe and Zn before filtration process sequentially were 0.3809 ppm, 0.0051 ppm, and -0.0012 ppm. After being filtered twice showed an absorption percentage for type I sieve (with carbon) on the heavy metals sequentially were Fe 75%, Zn 14.29% and Cu 10.78%. Sieve type II (without carbon) absorption percentage of each heavy metal were Fe 59.5%, Zn 7.75%, and Cu 0.0%, while the water discharge at the sieve type I (with carbon) obtained an average water discharge of 0.164 645 x 10-2 m3/s, and the sieve type II (without carbon) of 0.17838 x 10-2 m3/s. Based on the result the sieve type I with carbon has a better result for water purification treatment.
PENGARUH AKTIVASI KARBON DIOKSIDA PADA PRODUKSI KARBON AKTIF MONOLIT DARI KAYU KARET Herniyanti, Septa; Taer, Erman; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Activated carbon monoliths from rubber wood have successfully been fabricated using combined physical-chemical activation and chemical activation. The process of combination of physical-chemical activation was started from physical activation process by flowing CO2gas for 2 hours at temperature of 800 oC, then applying chemical activation process by immersing the carbon in 3 M KOH solution and 2,5 M H3PO4  solution. The samples activated by the combination  of physical-chemical activation were named as A1and those that were activated by chemical activation were named as sample A2.  Both activation methods yielded different activated carbon. The physical properties analyzed were density, porosity, and BET surface area, whereas the electrochemical property obtained from measurements using cyclic voltammogram method was specific capacitance. N2adsorption-desorption gas treatment resulted BET surface area of 542.586 m2g-1 and 115.147 m2g -1 for each sample, respectively. The resulted specific capacitances of the measurement using the cyclic voltammogram method for each sample were 43.67 F g-1and 37.74 F g-1 , respectively. Based on all obtained data analysis, it can be concluded that the physical-chemical activation produced larger BET surface area and higher specific capacitance than those resulted from chemical activation for supercapacitor cells.
KARAKTERISTIK SPEKTRUM KEBISINGAN KENDARAAN SAAT BERHENTI Muliana, Dewi; ', Juandi; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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The Characteristics of Noise Spectrum for Vechicle at Rest condition at Jalan Soekarno Hatta, Pekanbaru, Indonesia. The research methodology uses Digital Voice Recorder experimentally and a GoldWave Software computes by a recorder. The measurement of noiseis detected at rest vehicle in four position having densed noise. First position has high peak and amplitude at Jalan Tuanku Tambusai 1. The other positions have low peak and amplitude at Jalan Soekarno Hatta 1, Jalan Tuanku Tambusai 2 and Jalan Soekarno Hatta 2 respectively. Noise signal is then evaluated at frequency 20 Hz - 20,000 Hz for all position. The intensityat position I has -85.0584 dB until -29.4942 dB, position II has -47.7043 dB until -84.5914dB , position III has -74.7860 dB until -46.7704 dB and position IVhas -74.7860 dB until - 46.3035 dB. The average noise spectrum intensity of vehicle against frequency y=Ax+B, where y is avarege spectrum intensity and x is frequency. The details is at position I (y=- 0.002x-35.93), at position II (y=-0.001x-52.01), at position III (y=-0.000x-54.81) and at position IV (y=-0.001x-50.24). In conclution, the spectrum of vehicle stop condition has low intensity.
EFEK VARIASI WAKTU BALL MILLING TERHADAP KARAKTERISTIK ELEKTROKIMIA SEL SUPERKAPASITOR BERBASIS KARBON Sari, Fitria Puspita; Taer, Erman; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Supercapacitor electrodes from  rubber wood saw dust (RWSD) have been fabricated using experiment method to study the ball milling  variation time  on performance of the supercapacitor cells. The carbon electrodes were prepared with time variation of  20, 40, and 80 hours and thickness  of  0.2 mm.  Carbon  electrodes were carbonized at 600oC and  followed by  physical activation  method in  CO2  gas atmosphere  on the constant temperature of 900o C, and chemical activation was performed by  KOH as an activating  agent. Densities  of the electrodes were  0.849 g/cm3 , 0.892 g/cm3 , 0.982 g/cm3 respectively. XRD measurement showed the peaks of carbon  electrodes at 2θ of 24.091o and  44.473o which represented  the presence of carbon  materials  with their crystal orientation of (002) and (100). SEM micrograph  on  magnification of 1000X showed that the pore  distribution of the carbon  electrodes dominant on macropores. This study found that the effects  of  increasing  of  ball milling  time  influenced  the electrochemical properties of  supercapacitor electrodes fro m RWSD.  The optimum  supercapacitor performance was found on  20 hour  milling time  electrode  and had a specific capacitance of 55.414 F/g.
PEMBUATAN KARBON AKTIF MONOLIT DARI KAYU KARET MENGGUNAKAN AKTIVATOR KOH DAN HNO3 UNTUK APLIKASI SUPERKAPASITOR ', Zulkifli; Taer, Erman; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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Activated carbon  monolith  (ACM)  was made  from  rubber  wood  for supercapacitor  applications  by using  two  activators,  namely  KOH  and  HNO3 . Carbonized sample were by N2 gas at a temperature of 600º C and were physically activated  by  CO2gas  at  800º C  for 2  hours.  KOH solution  of  1,  3  and  5M  was used  as  chemical  activation  solution.  ACM  electrodes  were tested  in  a two-electrode system,  which was stainless steel  as a  current  collector  and a 1M  H2SO4 solution  as  an  electrolyte  solution.  Electrochemical characterization  results by impedance  spectroscopy  methods  showed an increase  in the  capacitive  properties, followed by  a decrease in  cells  resistance. The  measurements  obtained the best capacitance  of  55.46  F/g.  XRD  patterns of  the samples showed  amorphous structure  and  SEM images  showed that  the  addition of  KOH  solution  resulted in the  pore  structure  of macroporous  and  mesoporous  combination.  In conclusion, this current result showed that the activator of KOH and HNO3have improved the performance of the ACM rubber wood electrode.
PENENTUAN EFISIENSI KOLEKTOR PELAT DATAR DENGAN PENUTUP KACA PADA SISTEM PEMANAS AIR SURYA ', Zelviana; Ginting, Maksi; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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A  research has been conducted to determine the efficiency of flat plate collector  with  its cover  made from  glass. Solar water heaters  were  made  and  comprised of five essential components, namely a  protective box,  a  plate absorbent,  an  insulator,  an  iron pipe, and a  transparent cover. In this study, the water  was flown  into the water tank, through  a  collector, and then  the  water  flowed  into a  tube  collectors.  The  collectors  used  in this  study  were  flat plate  collectors  with one and two layer lid.  The  data  was  collected  within 14 days,  starting from  9.00 am until  3.00 pm  WIB  with one hour time interval.  The average  efficiency  for  a single  layer collector  was  42.62 % to 62.14 % , and for the two layer collectors  was  51.69 % to 85.74 % . These results  showed that the loss of heat on a flat plate collector with two layer was smaller than those of a single layer collector.
ANALISA PENGGUNAAN LENSA SILINDER UNTUK MENGUBAH BENTUK BERKAS LASER DIODA MENJADI BENTUK GARIS Mashuri, Muhammad; ', Minarni; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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A research on the application of cylindrical lenses to change beam shape of diode lasers from  eliptical to line shape has been conducted.  The beam characteristic of the lasers before and after using the lenses were analyzed by a calibrated photodiode and a CCD camera. The distance between CCD camera and the lenses were also varied to obtain the optimal length of the line.  The diode lasers used were  λ=830 nm Coherent diode laser with beam size 0,6 mm and 0,9 mm in x and y axis and  λ=638 nm Aixiz diode laser with beam size 1,2 mm and 1,6 mm in x and y axis were used.  Three  cylindrical lenses with three  different focal length were used whice were 50 mm, 75 mm, and 95 mm respectively.  The results showed that the maximum line lengths (L) of  λ=830 nm diode laser were 1,86 mm, 2,55 mm, and 1,39 mm respectively. For the  λ=638 nm diode laser the maximum line length (L) were 3,74 mm, 4,32 mm, and 3,87  mm respectively to the same focal length. The result also showed that the bigger λ produced the shorter line (L) than the smaller λ. For the biggest focus need the longest distance (z) to produce the longest line.