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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia Jurnal Sains Materi Indonesia Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Jurnal Farmasi Andalas Jurnal Riset Kimia Jurnal Kimia dan Kemasan Elkawnie Jurnal Litbang Industri Lantanida Journal Indonesian Journal of Chemistry Jurnal Ecolab Molekul: Jurnal Ilmiah Kimia Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia REACTOR : Journal of Research On Chemistry And Engineering Jurnal Kimia dan Kemasan Jurnal Litbang Industri Bulletin of Chemical Reaction Engineering & Catalysis al Kimiya : Jurnal Ilmu Kimia dan Terapan
Safni Safni
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Andalas University, Kampus Unand Limau Manis Padang, 25163
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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DEGRADASI ZAT WARNA SUDAN I SECARA SONOLISIS DAN FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Safni -; Umiati Loekman; Fitra Febrianti; Maizatisna -; Tadao Sakai
Jurnal Riset Kimia Vol. 1 No. 2 (2008): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i2.67

Abstract

 ABSTRACT Degradation of Sudan I dye had been done with sonolysis and photolysis by adding anatase-TiO2.  Sonolysis method were performed using an ultrasound with frequency  of 45 kHz. Photolysis method were performed using an irradiation of UV light with λ = 359 nm.  Degradation of 4 mg/L Sudan I with addition of 0.1000 g anatase-TiO2 at pH = 7.0, temperature 25 ± 1°C, percentage of degradation 64.04% within 180 minutes sonolysis.  Degradation of 4 mg/L Sudan I using photolysis with addition of 0.1000 g anatase-TiO2 at pH = 7.0 and percentage of degradation 100% within 180 minutes photolysis. Degradation of 4 mg/L Sudan I using sonolysis and photolysis  simultaneously with addition of 0.1000 g anatase-TiO2 at pH = 7.0 and percentage of degradation 94.04% within 180 minutes treatment.   Keywords : degradation, sonolysis, photolysis, Sudan I, anatase-TiO2.
DEGRADASI SENYAWA RHODAMIN B SECARA SONOLISIS DENGAN PENAMBAHAN TiO2 HASIL SINTESA MELALUI PROSES SOL-GEL Syukri Arief; Safni -; Putri Perdana Roza
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.v1i1.86

Abstract

 ABSTRACTDegradation of rhodamine B had been done by sonolysis method. Optimum temperature sonolysis were found of 41-50 oC. In this condition, rhodamine B 2 mg/L could be degradated around 64.04% during 6 hours sonolysis. Percentage degradation of rhodamine B enhanced by addition of TiO2 in solution. TiO2 was prepared with sol-gel process using titanium isopropoxide (TIP), isopropanol and dietanolamine (DEA) as precursor. It was heated on 500 oC and 700 oC in order to get TiO2-anatase dan TiO2-rutile. Rhodamine B 2 mg/L could be degradated around 68.48 and 90.00 % during 6 hours sonolysis on optimum temperature with addition of 0.1 g  TiO2-rutile and TiO2-anatase, respectively. Keyword: rhodamine B, sonolysis, sol-gel
PENGGUNAAN KATALIS ZnO-H2O2 UNTUK DEGRADASI ZAT WARNA RHODAMIN B DAN ALIZARIN-S Safni -; Fitrah Amelia; Oktanora Liansari; Hamzar Suyani; Yulizar Yusuf
Jurnal Riset Kimia Vol. 3 No. 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.87

Abstract

 ABSTRACT The textile industry produce colored waste liquid that can contaminate the line water and its populations. A number of dyes are using in textile industry processes such as rhodamine-B and alizarine-S. Both of dyes are toxic for human life. In order to reduce the concentration that dyes is used the sonolysis method which have good efficiency and effective to degrade this pollutants. Sonolysis was performed using an ultrasound energy at 47 kHz. Catalyst ZnO is used to get better degradation. Rhodamine-B 2mg/L with 0.3 g ZnO addition, pH 5, temperature 40°C get 35.44% degradation after 60 minutes. If we used 3 mL H2O2 30% in the same condition the degradation up to 42.67% and with the combination of 0.3 g ZnO - 3 mL H2O2 as catalysts it got 91.99% after 90 minutes. Alizarine-S 20 mg/L with 0.5 g ZnO addition, pH 5, temperature 50°C was degraded up to 86.45% after 35 minutes. Furthermore, the degradation reached 95.79% if it used 0.5 g ZnO and 25 mL H2O2 30% at pH 5 and temperature 50°C after 35 minutes sonolysis. Keywords : rhodamine-B, alizarine-s, ZnO, H2O2
Penentuan Vanadium Secara Spektrofotometri Fosfowolfrovanadat Dalam Batuan Bukit Pianggu Kabupaten Solok Roswita -; Hamzar Suyani; Safni -
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.v2i1.96

Abstract

 ABSTRACT A simple, rapid and accurate Spectrophotometric method described to the determination of vanadium in ore using sodium tungstat as a complexing agent. The method is based on the oxidation of sodium tungstat to form a yellow colored on reaction with vanadium (V), having maximum an absorption occurred at 403 nm. The relative standar deviation of the method for 8 mg/L vanadium (n=11) was 0.24%, and the molar absorptivity is 2.026103 L mol-1cm-1 and sensitivity Sandell is 2.5  10-2 mg cm.2 . The recovery test is 99.47%.  The effect of ion interfering Fe  (element large amount in ore) on determination is describe. The general procedure which was developed is suittable for determination of 0-20 mg/L of Vanadium and should be applicable to variety of ore sample. Keywords : vanadium, spectrophotometric, sodium tungstat, ore
AMOBILISASI KOMPLEK KOBAL(II) PADA POLI(4-VINILPIRIDIN) DAN KARAKTERISASINYA Syukri -; Safni -; Anna Fadhilla
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.v4i1.110

Abstract

 ABSTRACTAcetonitrile ligated cobalt(II) complex was successfully immobilized on poly(4-vinylpyridine) (P4VP). The grafted material was characterized by Fourier Transform Infra Red (FTIR), Scanning Electron Microscope (SEM), UV-Visible Spectrometry, Thermal Gravimetry-Differential Thermal Analysis (TG-DTA) and Atomic Absorption Spectrophotometry (AAS). The FTIR measurement confirmed a successful grafting indicated by the presence of a weak donor-acceptor interaction between N of poly(4-vinylpyridine) with the Co2+ of the complex. A change of surface morphology after immobilization process was evidenced by SEM photographs. TG-DTA analysis showed that the attached Co(II) complex on P4VP was found to be moderately thermally stable. The metal leaching of the obtained heterogeneous catalyst measured by AAS was found to be less than 0.1%. Keywords: Immobilization, Grafting, Heterogeneous catalyst, Donor-acceptor interaction, Surface area, Metal leaching
DEGRADASI SENYAWA PARAQUAT DALAM PESTISIDA GRAMOXONE® SECARA FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Yuni Era; Safni -; Hamzar Suyani
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.v2i1.122

Abstract

 ABSTRACT This research is conducted to know whether the photolysis method by adding TiO2-anatase can degrade the paraquat compound in Gramoxone pesticide. Photolysis method is conducted by using UV 10 watt lamp at the wavelength of 365 nm. The result shows that photolysis method could degrade the paraquat compound at 4.0 mg/L concentration as 16.02% after 60 minutes irradiation. Paraquat compound with the similar concentration by adding 10 mg unmixed TiO2-anatase could degrade 26.01% after 60 minutes irradiation and 62.30% by mixing TiO2-anatase. Furthermore, paraquat with the same concentration and TiO2-anatase addition could degrade 99.54% after 240 minutes irradiation. Keywords : degradation, photolysis, paraquat, anatase-TiO2
DEGRADASI SENYAWA DIKOFOL DALAM PESTISIDA KELTHANE 200 EC SECARA FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Safni -; Desmiati -; Hamzar Suyani
Jurnal Riset Kimia Vol. 2 No. 2 (2009): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i2.154

Abstract

  ABSTRACT This research is conducted to know whether dicofol compound in Kelthane 200 EC pesticide can be degraded with photolysis method by adding TiO2-anatase. Photolysis method is conducted by using UV 10 watt lamp at the wavelength of 365 nm. The result shows that photolysis method could degrade the dicofol compound at 30 mg/L concentration as 9.73% after 60 minutes irradiation. Paraquat compound with the similar concentration by adding 30 mg unmixed TiO2-anatase could degradade 32.51% after 60 minutes irradiation and 65.84% by mixing TiO2-anatase. Furthermore, dicofol with the same concentration and TiO2-anatase addition could 86.13% after 180 minutes irradiation. Keywords : degradation, photolysis, dicofol, anatase-TiO2   
DEGRADASI SENYAWA PERMETRINDENGAN MENGGUNAKAN TiO2-Anatase DAN ZEOLIT ALAM SECARA SONOLISIS Zilfa -; Hamzar Suyani; Safni -; Novesar Jamarun
Jurnal Riset Kimia Vol. 2 No. 2 (2009): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i2.162

Abstract

  ABSTRACT The research about the degradation of permethryn compound had been done by sonolysis method using anatase- TiO2 and natural zeolyte (mordenit kinds) as catalysts. Permethryn is one of synthetic pyretroid pesticides that low toxicity for mamals but it is high toxicity for fishs, insects and water microorganisms. Sonolysis method is conducted by using ultrasonic wave at frequency 45 kHz. The results show that sonolysis method without the addition of anatase-TiO2 and zeolite on optimum temperature at 40°C during 120 minutes treatments could be degrade 20 mg/L permethryn until 22.23%. In other hands, the degradation of 20 mg/L permethryn in the same condition with adding 0.002 g anatase-TiO2 achieved 44.95% but for using 0.2 g zeolyte could be degrade 52.34%.  Keywords :  degradation, permethrin ,TiO2-anatase , sonolysis, zeolite   
DEGRADASI MALACHITE GREEN OXALATE SECARA FOTOLISIS DAN OZONOLISIS DENGAN PENAMBAHAN ZnO-SnO2 Bhayu Gita Bhernama; Syukri -; Safni -
Jurnal Riset Kimia Vol. 7 No. 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.169

Abstract

Vol 7 No 2ABSTRACTDegradation of malachite green oxalate (MGO) compounds has been carried out by ozonolysisand photolysis methods with addition of ZnO-SnO2 as catalyst. MGO solution was analyzed bya spectrophotometer UV/Vis at 250-650 nm. The results showed that ozonolysis process fasterthan photolysis. 6 mg/L MGO can be degraded as much as 97.3% after irradiated with UV light(369 nm) within 150 minutes with the addition of 0.020 g of ZnO-SnO2. Otherwise, 99.6% of 6mg/L MGO can be degraded by ozonolysis process within 5 minutes by the addition of 0.025 gof ZnO-SnO2. Analysis of the remaining MGO solution by reverse-phase HPLC showedintermediate-substances peaks and peak height of MGO at a retention time of 3.18 mindecreased as the data obtained using a UV/Vis spectrophotometer.Keywords: degradation, MGO, photolysis, ozonolysis, ZnO-SnO2
DEGRADASI RHODAMIN B SECARA FOTOKATALISIS DAN OZONOLISIS DENGAN PENAMBAHAN TIO2-NIFE2O4, TiO2-CuFe2O4, DAN TiO2-MnFe2O4 Safni -; Deliza -; Rahmayeni -
Jurnal Riset Kimia Vol. 7 No. 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.178

Abstract

Vol 7 No 2ABSTRACTDegradation of Rhodamin B has been done by photocatalytic and ozonolysis using TiO2-Anatase and TiO2-NiFe2O4, TiO2-CuFe2O4, TiO2-MnFe2O4 catalysts, photocatalytic methodused lamp with λ = 365 nm and ozonolysis methode used ozon reactor. Analysis of degradationresult used spectrofotometer UV-Vis. TiO2-NiFe2O4, TiO2-CuFe2O4, TiO2-MnFe2O4 catalystwere characterized by XRD to determine size and structure of crystal. The solution ofRhodamin-B 2 mg/L was degraded 93,33 % without catalyst after being photolysed for 180minutes and after adding 0,02 g TiO2-MnFe2O4, TiO2-CuFe2O4, TiO2-Anatase, TiO2-NiFe2O4catalyst. The additional consentration in a row are 99,55 %; 99,77 %; 100 %; 100 %. Thesolution of Rhodamin B 2 mg/L was degraded 99,33% without catalyst after being ozonolysisfor 25 minutes and after adding 0,02 g of TiO2- MnFe2O4, TiO2-CuFe2O4, TiO2-Anatase, TiO2-NiFe2O4 catalysts with the additional consentration in a row are 99,77 %, 99,77 %, 99,77 %,100 %. So the degradation of Rhodamin B using ozonolysis method was faster thanphotocatalytic with catalysts and without catalyst.Keywords: Rhodamin B, Photocatalytic, Ozonolysis, TiO2-Anatase, TiO2-NiFe2O4, TiO2-CuFe2O4,TiO2-MnFe2O4.
Co-Authors -, Maizatisna -, Roswita -, Zulfarman Abinul Hakim Adlis Santoni Admi Admi Aldini, Tasya Amelia, Fitrah Anggraini, Deby Anna Fadhilla Arief Yandra Putra Bhayu Gita Bhernama BUSTANUL ARIFIN Chris Deviarny Deby Anggraini Deliza - Deliza, Deliza Desmiati - Deswati Deswati Dheasy Gustira Dina Nofebriani Dini Hariyati Adam Dytta Fitria Elma Fadrita Rahman Emriadi - Eno Okta Patricia Era, Yuni Fadhilla, Anna Fardila Sari Febi Rahmi Febrina Arfi Fitra Febrianti Fitrah Amelia Fitrah Amelia fitri mairizki Fitri Mairizki, Fitri Fivi Mona Bareno Gustiana, Mega Hakim, Abinul Hamzar Suryani Hamzar Suyani Harza Dipajana Umardi Hazanita Jumiaty Hazanita Jumiaty Henny Lucida Hermansyah Aziz Hermansyah Aziz Hilfi Pardi Ibnu Irawan Imelda Imelda Jarnuzi Gunlazuardi Jihanul Khaira K Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah, Khoiriah Liansari, Oktanora Mai Efdi Mai Efdi Maizatisna - Maizatisna Maizatisna Marniati Salim Matlal Fajri Alif Mechy Rezita Wahyuni Mega Gustiana Muhamad Nasir Muhamad Nasir, Muhamad Neila Yenni Norman Ferdinal Novesar Jamarun Novesar Jamarun Nurul Pratiwi Oktanora Liansari Olly Norita Tetra Putri Arwanda Putri Perdana Roza Putri, Reza Audina Rahmi, Febi Rahmiana Zein Refilda Refilda Refinel - Reza Audina Putri Reza Audina Putri Roswita - Roza, Putri Perdana Sakai, T. Sakai, Tadao Salmariza Sy Sumaryati Syukur Suryati Suryati Syukri - Syukri Arief Syukri Syukri Syukri Syukri Syukri Syukri T. Sakai Tadao Sakai Tommi Hermansyah Trisna Olinovela Trisna Ollinovela Umiati Loekman Umiati Loekman Umiati Loekman Upita Septiani Vanny Yulia Safitri Vepilia Wulanda Wellia, Diana Vanda Willy Cahya Nugraha Willy Cahya Nugraha, Willy Cahya Yefrida - Yefrida Yefrida Yetria Rilda Yuli Okta Fitriyani Yulizar Yusuf Yulizar Yusuf Yuni Era Zaimi Abdullah Zaimi Abdullah Zilfa Zilfa Zulfarman - Zulfarman Zulfarman Zulkarnain Chaidir