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PENENTUAN DAYA JERAP BENTONIT DAN KESETIMBANGAN ADSORPSI BENTONIT TERHADAP IONCu(II) Sahan, Yusnimar; Despramita, Kiki; Sultana, Yulfiana
CHEMISTRY PROGRESS Vol 5, No 2 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.2.2012.773

Abstract

Bentonit alam asal Riau secara kualitas tidak bisa dimanfaatkan sebagai adsorben karena daya jerapnya rendah dibandingkan dengan bentonit komersial. Pada prinsipnya, daya jerap bentonit tersebut akan meningkat jika diaktivasi baik secara fisika maupun kimia. Bentonit yang telah diaktivasi dapat digunakan sebagai penjerap logam berat yang ada dalam cairan. Pada penelitian ini, prosesaktivasi bentonit alamdilakukan dengan cara pemanasan pada suhu 400oC sampai beratnya konstan. Setelah diaktivasi ditentukan daya jerapnya terhadap ion Cu(II). Optimalisasi daya jerap bentonit dilakukan dengan perlakuan kondisi yang berbeda yaitu variasi waktu adsorpsi (20, 40, 60,80, 100, 120, 180 & 240 menit), variasi berat bentonit (0,5, 1,0, 1,5, 2,0 & 2,5 g) dan konsentrasi ion Cu(II) yaitu 20, 40, 60, 80, 100 dan 120 ppm. Berdasarkan data yang diperoleh ditentukan waktu dan model keseimbangan adsorpsi. Pada penelitian ini diperoleh daya jerap bentonit yang diaktivasi paling maksimal adalah 32,75 mg Cu(II)/g bentonit pada kondisi perlakuan berat bentonit 2,5 g, waktu adsorpsi 180 menit dan konsentrasi ion Cu(II) 60 ppm. Pada kondisi tersebut bentonit menyebabkan kadar ion Cu(II) dalam cairan turun dari 60 ppm menjadi 32,75 ppm, penurunannya sekitar 54,58%. Sedangkan daya jerap bentonit pada waktu adsorpsi 240 menit lebih rendah dibandingkan dengan daya jerapnya pada waktu adsorpsi 180 menit. Keseimbangan adsorpsi ion Cu(II) oleh bentonit tercapai pada waktu 180 menit, dan model kesetimbangan adsorpsinya sesuai dengan Isotherm Langmuir, artinya adsorpsi ion Cu(II) oleh bentonit terjadi secara kimia yaitu mungkin terjadi reaksi pertukaran ion dengan panas reaksi 21,038 kcal/mol.oK.Bentonit alam asal Riau secara kualitas tidak bisa dimanfaatkan sebagai adsorben karena daya jerapnya rendah dibandingkan dengan bentonit komersial. Pada prinsipnya, daya jerap bentonit tersebut akan meningkat jika diaktivasi baik secara fisika maupun kimia. Bentonit yang telah diaktivasi dapat digunakan sebagai penjerap logam berat yang ada dalam cairan. Pada penelitian ini, prosesaktivasi bentonit alamdilakukan dengan cara pemanasan pada suhu 400oC sampai beratnya konstan. Setelah diaktivasi ditentukan daya jerapnya terhadap ion Cu(II). Optimalisasi daya jerap bentonit dilakukan dengan perlakuan kondisi yang berbeda yaitu variasi waktu adsorpsi (20, 40, 60,80, 100, 120, 180 & 240 menit), variasi berat bentonit (0,5, 1,0, 1,5, 2,0 & 2,5 g) dan konsentrasi ion Cu(II) yaitu 20, 40, 60, 80, 100 dan 120 ppm. Berdasarkan data yang diperoleh ditentukan waktu dan model keseimbangan adsorpsi. Pada penelitian ini diperoleh daya jerap bentonit yang diaktivasi paling maksimal adalah 32,75 mg Cu(II)/g bentonit pada kondisi perlakuan berat bentonit 2,5 g, waktu adsorpsi 180 menit dan konsentrasi ion Cu(II) 60 ppm. Pada kondisi tersebut bentonit menyebabkan kadar ion Cu(II) dalam cairan turun dari 60 ppm menjadi 32,75 ppm, penurunannya sekitar 54,58%. Sedangkan daya jerap bentonit pada waktu adsorpsi 240 menit lebih rendah dibandingkan dengan daya jerapnya pada waktu adsorpsi 180 menit. Keseimbangan adsorpsi ion Cu(II) oleh bentonit tercapai pada waktu 180 menit, dan model kesetimbangan adsorpsinya sesuai dengan Isotherm Langmuir, artinya adsorpsi ion Cu(II) oleh bentonit terjadi secara kimia yaitu mungkin terjadi reaksi pertukaran ion dengan panas reaksi 21,038 kcal/mol.oK.
Konversi Biji Alpukat Menjadi Bio-oil Dengan Metode Pyrolisis Menggunakan Katalis Zeolit Alam Agustin, Dian; Sahan, Yusnimar; Bahri, Syaiful
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The trend of fossil fuel demand is always increase by time in the world. Yet, petroleum oil as a non-renewable has been declining each year. It is necessary to find a new alternative fuel that can be renewed, such as to applied biomasses as resources energy. One of several potential biomasses can be converted to energy or bio-oil is the seed of an avocado because it’s contain so high fat fatty acid (FFA). This seed has not been used maximacally yet, so in this research this seed is converted into bio-oil by using pyrolysis method and natural zeolite as a catalyst. The purpose of this research is to get the highest yield of bio-oil by applied variation of ratio sample : catalyst (50:0, 50:1, 50:2, 50:3 g/g), and temperature variation of pyrolysis process is 270, 300, 330 ºC. Based on results in this research, the highest of bio-oil is 79,08 % found under condition ratio sampel : catalyst 50 :2 and pyrolysis temperature is 330 ºC. The bio-oil is analyzed and it’s density 0.988 g/ml, viscosity 7,560 cSt, acid value 0,1002 mg NaOH/ g sample,  flash point 56 ºC and heating value 17,354 MJ/kg. Based on GC-MS analyzed bio-oil were contained (2,4,4-trimethyl-2-pentene), (3,4,4-trimethyl-2- pentene), (Diisobutylene), (2,4,4-trimethyl-3-pentene) and (2-methyl-trimer- propene) with peak area (7,84%), (7,82%), (5,69%), (3,82%) and (3,58%).  Keyword :  Avocado seed, Bio-oil, Natural Zeolite, Pyrolysis
Pemanfaatan Abu Tandan Kosong Sawit Sebagai Larutan Elektrolit Pada Aplikasi Sel Elektrokimia Wahyu Rahmadhan; Yusnimar Sahan; M. Iwan Fermi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Oil palm empty fruit bunches ash is the material which has K+ about 25.68%. K+ has a high value of potential is -2.94 volt (V). That is making K+ be the ion which high possibility for reduction others ion. This research having goals to known DC electricity value (such as voltaic value, current, power , and capacity) within using oil palm empty fruit bunches ash as the electrolyte solution. Part of scrap electronic device that is printed computer board/PCB and Galvanic zinc metal used as electrodes (Kation and Anion). Oil palm empty fruit bunches ash solute made by (b/b) mass ratio, ash: water is 1: 4. And then, the rate of kalium analyzed by flame photometry. As a result, kalium has 60.375 g/L in oil palm empty fruit bunches solutions. After that making an application of electrochemical cell with variates 8, 10 and 12 electrodes cell to calculate voltaic and current values. Beside that other variety is compare ash solution with NaCl solution about DC electricity value with equal of electrode cells (12 cells) and ratio. Results are electrochemical cell having voltaic value, current, power with 12 cells of electrodes is 4.76 V, 0.65 miliampere (mA) and 3.094 miliwatt (mW). The conclusion that oil palm empty fruit bunches ash solution having more high electricity value than NaCl solutions.Keywords: ash, current, NaCl, PCB, volt
Pemanfaatan Printed Circuit Board (Pcb) Motherboard Bekas Untuk Pembangkit Listrik Portabel Pebriansyah Putra; Yusnimar Sahan; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Galvani cells which are cells based on chemical reactions that can produce electric current. In this research, the generator cell was built to produce electricity. Galvani cells is consisting of zinc and used as a anodes, the motherboard printed circuit board (PCB) is used as a cathode, and a solution of NaCl as an electrolyte. The aim of this research is to estimate the performance of the galvani cell using the types of electrolyte solutions NaCl and NaOH with variation concentrations (9%, 12%, and 15%) and electrode surface area (5 cm x 10 cm, 6 cm x 10 cm, 7 cm x 10 cm). Cell performance is measured by multitester equipment and LED lights (8 volt). The results shown that the generator cell can produce electric power of 6.82 volts optimally by using 15% NaOH and 7 cm x 10 cm electrode surface area applied for this research.Keywords: electrode, electrical voltage, PCB motherboard, zinc.
Konversi Tongkol Jagung Menjadi Bio - Oil Dengan Bantuan Katalis Zeolit Alam Secara Pyrolysis Siti Rahmah; Yusnimar Sahan; Syaiful Bahri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bio-oil is obtained from corn cobs  (Zea mays  L.)    biomass by using pyrolisis process with a natural zeolite catalyst ratio between the sample and catalyst. This research was conducted by using a pyrolysis reactor, 500 ml of thermo-oil (silinap) are fed into the reactor pyrolisis . Then the pyrolisis process is started by flowing the nitrogen gas 1.35 mL / sec into the reactor and  pyrolisis process is aloowing run 3 hours. In order to get the maximum yield of bio-oil, there were determined the affect of ratio variation between biomass and catalyst (50:1, 50:2 and 50:3 g), and variation of pyrolysis temperaturec(270, 300 and 330oC). as a comperison the pyrolysis process without a catalysthas done. The result of this research, the higher yield of bio-oil is 84,9% which obtained under condition ratio a sample and a catalyst 50:2 g, and a pyrolysis temperature 330oC. Based on the result of characterized of bio-oil, density is 0.899 g / ml , 7.133 cSt viscosity , acid number 0.097 g NaOH / g sample , and the flash point 54 º C. Based on the results of GC-MS analysis showed that the dominant component in the bio-oil by using 2 grams of natural zeolite and 330oC are Cyclohexane,1-ethyl-1-methyl 15.96 %; pentan ,2,2,4, 4 tetramethyl 5.78%; 1-pentene, 2,4,4  –  trimethyl 5.78%; 2,3,4,4-trimethyl-pentene 4.99% and 2-pentene,2,4,4-trimethyl 2.44 %. Key Word : Bio-oil, Corn Cobs, Natural Zeolite, Pyrolisis.
KONVERSI TEPUNG SAGU MENJADI SIRUP GLUKOSA DENGAN MENGGUNAKAN KATALIS ASAM KLORIDAv Edi Sutanto; Yusnimar Sahan; Deby Octavia
Jurnal Sagu Vol 13, No 1 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.935 KB) | DOI: 10.31258/sagu.v13i1.2132

Abstract

Sago is one of carbohydrates potential resource for foods and raw materials in industries. Sago can beconverted to a glucose syrup by using HCl 0,5N as a catalyst. The purpose of this research is make glucosesyrup with the process of hydrolysis of sago flour and determining the influence of temperature, volume theaddition of acid and hydrolysis time on reducing sugar concentration of syrup produced. In order to get thehighest of glucose concentration in these syrup, in this research sago hydrolysis process have been doneunder variation of the volume acid (10, 15 and 20 ml), the hydrolysis temperatures (105, 115 and 125 o C) andthe hydrolysis time (15, 30 and 45 minutes). The glucose syrup were analyzed, such as water content by SNI08-7070-2005 and glucose content by the Nelson-Somogyi method. Based on the result, the highest ofglucose content in this syrup is 67.7% under condition the addition of 0.5 N HCl volume by 15 ml, hydrolysistime 30 minutes and temperature of 125 o C. The resulting glucose syrup meets the standard based on SNI 01-2978-1992 namely glucose concentration of more than 30% and a water content of less than 20%.Key words: glucose, glucose syrup, hydrolysis, HCl, sago starch