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All Journal Jurnal Fisika Unand Jurnal Riset Kimia SEMIRATA 2015 Jurnal Zarah Communications in Science and Technology Jurnal Hilirisasi IPTEKS (JHI) Jurnal Ilmu Fisika Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks
Olly Norita Tetra
Universitas Andalas
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Veterinary Other

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PENGARUH UDARA TERHADAP FOTOLISIS AIR OLEH SERBUK TiO2 DENGAN ADANYA KALIUM IODIDA Admin Alif; Hermansyah Aziz; Olly Norita Tetra; Suci Mulya Prima
Jurnal Riset Kimia Vol. 3 No. 2 (2010): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i2.28

Abstract

  ABSTRACT Hydrogen is one of the promising alternative energy sources which is environmentally-friendly. Amongs several methods that have been used to produce hydrogen is a photolysis base on photochemical reaction which has been choosen and applied for this work. In this system where water was photolyzed in the present of TiO2 powder as photocatalyst and potassium iodide as sacrificial agent. The sample was prepared by addition various potassium iodide concentrations and then each sample was treated in the present and absent of air. The sample was placed in a quartz reactor which was then illuminated by a Philips low pressure vapoured mercury lamp (λ = 254 nm) as light source for 7 hours. Produced gas volume was measured by a method based on the movement of soap bubbles. The results showed that the maximum gas volume obtained at 0.006 g/L TiO2 and 0.1 g/L KI concentration (in the present and absent of air) were applied. Furthermore, the maximum volume of hydrogen gas was produced at the present of air. In the present of air, dissolved oxygen accelerated H2 gas productions which act as oxidation agent and electron carrier to H+. Keywords: Photolysis, Photocatalyst, Titania, Hydrogen, Sacrificial agent
TRANSPOR ION TEMBAGA (II) MELALUI TEKNIK MEMBRAN CAIR FASA RUAH Olly Norita Tetra; Admin Alif; Hermansyah A; Emriadi -
Jurnal Riset Kimia Vol. 1 No. 1 (2007): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i1.57

Abstract

 ABSTRACT Bulk liquid membrane methode have been used to study transport  of  Cu(II) ion containing oxine as carrier. It was found that total Cu(II) ion 20 ppm was transported from source phase to receiving phase after 360 min reached 97.3 % in optimum conditions source phase pH is 3, oxine concentration as carier in membrane phase is 17.5 x 10-4 M, membrane volume is 20 mL, sulfur acid concentration in receiving phase 0.15 M and time of balance is 15 minute. Thus a pH gradient is utilized to drive the Cu(II) transport.
OPTIMALISASI TRANSPOR Zn(II) DENGAN ZAT PEMBAWA DITIZON MELALUI TEKNIK MEMBRAN CAIR FASA RUAH Olly Norita Tetra; Zaharasmi K; Refinel -; Eka Kurniawaty
Jurnal Riset Kimia Vol. 3 No. 2 (2010): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i2.68

Abstract

 ABSTRACT Zn(II) transport from the source phase into the source phase had been researched by using dithizone as carrier through bulk liquid membrane. Ion transport are started by adding 6 mL source phase that consist of Zn(II), 12 mL receiver phase that consist of Na2EDTA and 20 mL membrane phase that consist of dithizone as carrier. The experiment operation technique was assisted by magnetic stirrer mixing at 340 rpm speed within 15 minutes equilibrium time. The measurement was done to both of source phase and receiver phase by using Atomic Absorption Spectrophotometer (213.9 nm) until Zn(II) was transported to receiver phase and residue in source phase was gathered. The research result that optimum conditions to transport 3.06 x 10-4 M Zn(II) was at pH 8.5 of source phase, 1.75 x 10-5 M dithizone concentrate at membrane phase, 0.06 M EDTA concentrate at pH 6 in receiver phase and 3 hours transport time with Zn(II) percentage which was transported to receiver phase 93% and residue in source phase do not detect. Keywords: transport Zn(II), bulk liquid membrane, dithizone
PENAMBAHAN ASAM OLEAT TERHADAP Sistem transpor Cu(II) dengan zat pembawa oksin melalui teknik membran cair fasa ruah Olly Norita Tetra; Zaharasmi -; Refinel -
Jurnal Riset Kimia Vol. 2 No. 1 (2008): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i1.88

Abstract

 ABSTRACT The removal of Cu(II) from aqueous solutions had been employed throught bulk liquid membrane techniques with arrange the optimization conditions of transport Cu(II) interface system. The optimum conditions of transport were found to be 3.1510-4 M of Cu(II) at pH 3  in the source phase,  17.510-4 M oxine dissolved into chloroform as membrane phase, 0,15 M H2SO4 as acceptor in  receiving phase, stirring rate was 340 rpm and  it was found that the transport of Cu(II) to receiving phase reached 97.41% during 6 hours. The effect of addition  oleat acid 1.57  10-3 M as surfactant  in membrane phase resulted a rapidly time of  transport Cu(II) to be 3 hours, wherein Cu(II) transported  into  the receive phase reached 97.83%  and remained  in feed phase 0%. Keywords: bulk liquid membrane, oxine, oleat acid, Cu(II) )transport
KINETIKA DAN SELEKTIFITAS SISTIM TRANSPOR Cu(II) ANTAR FASA MELALUI TEKNIK MEMBRAN CAIR FASA RUAH DENGAN MENGGUNAKAN OKSIN SEBAGAI ZAT PEMBAWA Refinel -; Zaharasmi -; Olly Norita Tetra
Jurnal Riset Kimia Vol. 4 No. 1 (2010): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i1.89

Abstract

  ABSTRACTThe effect of addition oleat acid 1.575 × 10-4M into membrane phase had been employed at the optimum condition of Cu(II) transport by the composition Cu(II) 3.15 × 10-4M as source phase with pH 3, oxine 17.5 × 10-4M dissolved into chloroform as membrane phase, H2SO4 0.15 M as receiving phase, stirring rate was 340 rpm. The result of the research showed increase in effectivity of transport Cu(II) interphase from 6 hours to 3 hours with the rate constants into membrane phase extraction (k1) 0.0454 minute-1, the stripping (k2) 0.0364 minute-1 at the temperature of 301°K and activation energy (Ea) 51.147 Kj/mol. The reaction was identified by means of kinetic model involving two consecutive irreversible first order. The selectivity of Cu(II) transport system analyzed to mixed Cu(II) ion with Cd(II), Co(II), Ni(II), Mg(II), Ca(II) and Sr(II) ions in pairing system or totaly system in 1 : 1 comparison. The measurement was performed to each ions that was transported receiving phase and the remains in resource phase by using SSA model Alfa-4. The result of research showed that Cu(II) was selective enough transported.  Keywords: Kinetic transportation, Cu(II) ions, oxine, oleat acid, selectivity   
UJI SELEKTIFITAS TRANSPOR Cu(II) TERHADAP Mg(II), Ca(II) DAN Sr(II) DENGAN ZAT PEMBAWA OKSIN DAN SDS SEBAGAI ADITIF MELALUI TEKNIK MEMBRAN CAIR FASA RUAH Olly Norita Tetra; Zaharasmi Kahar; Admin Alif; - Frengky
Jurnal Riset Kimia Vol. 5 No. 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.215

Abstract

Selectivity of Cu(II) transport from the source phase containing Mg(II), Ca(II) and Sr(II) into the receiver phase had been researched by using oxine as carrier and Sodium Dodecyl Sulfate (SDS) as additive through bulk liquid membrane.The efficiency of the method depends on parameter (the pH of the donor and acceptor phase, effect of carrier concentrations, and time of transport). The selectivity of the method was assessed by performing the single, as well as the competitive transport experiment of Mg(II), Ca(II,) and Sr(II) ion and then Cu(II) percentage which was transported to receiver phase 99.98% and residue in source phase do not detect. The measurement was done to both of source phase and receiver phase by using Atomic Absorption Spectrophotometer (213.9 nm).
PROSES ULTRAFILTRASI UNTUK PENJERNIHAN SARI BUAH MARKISA (Passiflora quadrangularis) DENGAN MEMANFAATKAN MEMBRAN KERAMIK Refinel -; Olly Norita Tetra; Roza Melia Usmita
Jurnal Riset Kimia Vol. 9 No. 2 (2016): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i2.285

Abstract

Ultrafiltration of passion fruit juice using variation thickness of ceramic membrane has been done.  The result shows that aquades flux value in 25 minutes for membrane 1.5; 2.0; 2.5; 3.0; and 3.5 mm is 17.0135; 19.1947; 10.9061; 10.9061 and 4.3624 L/h m2. Whereas passion fruit juice in same time for membrane 1.5; 2.0; 2.5 mm is 8.2886; 5.6712 and 4.3624 L/h m2. For membrane 3.0 and 3.5 mm it has not been done because flux value are too small that indicate fouling. Physical and chemical properties parameter in ultrafiltration of passion fruit juice obtained for turbidity and color very different between passion fruit juice before and after ultrafiltration, whereas reducing sugar and vitamin C are not significant different between passion fruit juice before and after ultrafiltration. Determination rejection coefficient value of membrane for turbidity, color  relatively significant whereas for reducing sugar and vitamin C are relatively not significant.
PENGELOLAAN BANK SAMPAH DALAM MENDUKUNG GO GREEN CONCEPT DI DESA ULAKAN TAPAKIS KABUPATEN PADANG PARIAMAN Bustanul Arifin; Taufiq Ihsan; Olly Norita Tetra; Nofrita Nofrita; Fadjar Goembira; Frenadin Adegustara
Jurnal Hilirisasi IPTEKS Vol 3 No 2 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i2.423

Abstract

Waste bank management in the Nagari Ulakan community needs to be done as a solution in waste reduction, waste management and processing. The increase in tourists will increase the amount of waste in Nagari Ulakan. the problem is not the amount of waste but the disposal, management and processing of waste which is a serious problem and must be handled properly in Nagari. The purpose of this community service activity is the existence of a waste bank can provide the best solution in achieving the target of waste reduction in Nagari Ulakan, Kecamatan Tapakis, Kabupaten Padang Pariaman. The waste bank management is carried out to support the Go Green Concept through counselling on the socialization of the waste bank, the usefulness, and the stages of the preparation process for forming a waste bank. In this counselling introduced types of waste, waste sorting processes, examples of paper and plastic waste processing. The activity was followed by mentioning at the stage of forming a waste bank management and waste bank operations. The results of this activity are the reduction of waste and the formation of a waste bank in Nagari Ulakan and increasing public awareness of waste management.
PEMBUATAN SEL FOTOVOLTAIK PASANGAN CuO/Cu DAN CuO/STAINLESS STEEL DALAM BENTUK TUNGGAL DAN SERABUT MELALUI METODA PERENDAMAN DENGAN NaOH Olly Norita Tetra
Jurnal Ilmu Fisika (JIF) Vol 3 No 1 (2011): March 2011
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.3.1.23-31.2011

Abstract

The research about Photovoltaic cell of CuO/Cu and CuO/Stainless steel in single and fiber made by NaOH submersion method by using KCl electrolyte has been done. In this research, the KCl solution is used with different concentrations. The measurement of intensity and voltage is done before and after the Photovoltage cell is radiated by the sun light for approximately 5 minutes. The optimum concentration obtained is 0,3 M. The highest value for intensity and voltage is obtained on fiber CuO/Cu electrodes with the values are 0,364 mA and 0,170 V, measured at 11.00 – 12.00 in the noon. The length time of submersion of Cu electrode with NaOH to is affecting the intensity and voltage of CuO production, submerging in relatively optimal in 24 hour. The Photovoltaic cell can be used with or without the sun light, with the voltage being produced is 0,109 mA for fiber CuO/Cu electrodes. CuO/Cu electrodes and Stainless steel CuO/Cu electrodes can be used on Photovoltaic cell.
FOTOVOLTAIK PASANGAN ELEKTRODA CUO/CU DAN CUO/STAINLESS STEEL MENGGUNAKAN METODE PEMBAKARAN DALAM BENTUK TUNGGAL DAN SERABUT DENGAN ELEKTROLIT NA2SO4 Olly Norita Tetra
Jurnal Ilmu Fisika (JIF) Vol 6 No 1 (2014): March 2014
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.6.1.1-7.2014

Abstract

Sel fotovoltaik pasangan elektroda CuO/Cu dan CuO/Stainless Steel dibuat melalui metode pembakaran dalam bentuk tunggal dan serabut, dengan menggunakan Na2SO4 sebagai larutan elektrolit. Pengukuran kuat arus dan tegangan dilakukan pada berbagai waktu mulai dari jam 08.00- 16.00 WIB. Besarnya arus dipengaruhi oleh konsentrasi elektrolit dan waktu penyinaran. Konsentrasi optimum Na2SO4 yang digunakan sebagai elektrolit adalah 0,06 M dan waktu penyinaran (saat penyinaran) adalah pada jam 11.00 WIB dengan arus dan tegangan masing-masing adalah 0,448 mA dan 0,239 V untuk untuk pasangan elektroda CuO serabut/stainless steel. Efisiensi tertinggi diperoleh untuk pasangan elektroda CuO tunggal/stainless steel yaitu sebesar 7,66 x 10-6 watt/cm2 .
Co-Authors - Frengky - Frengky -, Zaharasmi -, Zaharasmi A, Hermansyah A.A. Ketut Agung Cahyawan W Adlis Santoni Admin Alif Admin Alif Admin Alif Afdhal Muttaqin Alif, Admin Asih Novia Bustanul Arifin Bustanul Arifin BUSTANUL ARIFIN Buty Kurnia Hamzani Chairunnisa, Nabila Putri Yusni Defri, Hadi Deswati Deswati Eka Kurniawaty Emriadi - Fadjar Goembira Fajarandi, Nabiel Fanny Novia Frenadin Adegustara Hermansyah A Hermansyah Aziz Indrawati Indrawati Joni, Rahma Kamiko, Awfa Joti Aghna Luh Putu Ratna Sundari Maghfirah, Sucy Mai Efdi Mai Efdi Matlal Fajri Alif Mega Silvia Nabiel Fajarandi Nofrita Nofrita Norman Ferdinal Novesar Jamarun Novesar Jamarun Novesar Jamarun Novia, Asih Perdana, Yola Azli Refinel - Roza Melia Usmita Safni Safni Safni Safni Suci Mulya Prima Suryati Suryati Suryati Suryati Suryati Syukri Arief Syukri Arief Syukri Syukri Syukri Syukri Syukri Syukri Taufiq Ihsan Usmita, Roza Melia Wahyuni, Hanif Yetria Rilda Yola Azli Perdana Yulizar Yusuf Yulizar Yusuf Zaharasmi - Zaharasmi K Zaharasmi Kahar Zaharasmi Kahar Zilfa Zilfa Zulhadjri Zulhadjri