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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Bumi Lestari Ecotrophic, Journal of Environmental Science CHEMISTRY PROGRESS Indonesian Journal of Chemistry
Ni Putu Diantariani
Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science

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FOTODEGRADASI METILEN BIRU DENGAN SINAR ULTRAVIOLET DAN KATALIS ZnO Ni Putu Diantariani; Ida Ayu Gede Widihati; I G. A. A. Ratih Megasari
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.485 KB) | DOI: 10.24843/JCHEM.2014.v08.i01.p21

Abstract

Study on  photodegradation methylene blue with ultra violet light and catalyst ZnO has been carried out. This study include determination of quantity of catalyst ZnO optimum  with radiation and without radiation, the optimum of pH, the optimum UV light radiation time, and the effectivity of photodegradation at optimum condition. The results of the research showed that percentage of degradation highly influence by the quantity of catalyst, pH of the methylene blue solution, and time of ultra violet radiation.  In this study, quantity of catalyst ZnO optimum of degradation methylene blue with UV light radiation was 40 mg, whereas degradation methylene blue without UV light radiation was 50 mg. The optimum pH of fotodegradation methylene blue occurs at pH 12 and the optimum UV light radiation time was 5 hours.  The effectivity photodegradation methylene blue at optimum condition was (94,67 ± 0,35) %.
PROSES BIOSORPSI DAN DESORPSI ION Cr(VI) PADA BIOSORBEN RUMPUT LAUT Eucheuma spinosum N. P. Diantariani; I W. Sudiarta; N. K. Elantiani
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.389 KB)

Abstract

Studies on biosorption and desorption of chromium (VI) on seaweed (Eucheuma spinosum) biosorben havebeen carried out. These studies included determination of biosorben acidity, optimum pH, contact time ofbiosorption, isoterm and biosorption capacity, and mechanisms of interaction between chromium (VI) and seaweed(Eucheuma spinosum) biosorben. Mechanisms of interaction were known with desorption chromium (VI) onseaweed biosorben using aquades, 1 M HCl and 0,05 M Na2EDTA.The result showed that the total acidity of seaweed biosorben was 4,1545 ± 0,3290 mmol/g, the optimum pHwas 5, and the contact time was 120 minute. Biosorption capacity of seaweed (Eucheuma spinosum) to chromium(VI) was 13,4992 mg/g. The highest desorption of chromium (VI) occurred with the use of aquadest which was40,69%. Whereas desorption using 1 M HCl and 0,05 M Na2EDTA were 4,84% and 0,20% respectively. This caseindicated that the main interaction mechanism of chromium (VI) on seaweed was hydrogen and Van der Waals bondwhich was relatively weak.
SINTESIS NANOKOMPOSIT LEMPUNG BENTONIT-ASAM SALISILAT DENGAN METODE SOL-GEL DAN KARAKTERISASINYA DENGAN XRD DAN IR-FTIR Ida Ayu Gede Widihati; Ni Putu Diantariani; Ni Made Puspawati
Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.696 KB) | DOI: 10.24843/JCHEM.2017.v11.i02.p07

Abstract

Dalam penelitian ini dilakukan sintesis nanokomposit lempung bentonit-asam salisilat dengan metode sol gel melalui mekanisme interkalasi. Pada proses interkalasi ini, asam salisilat harus dibuat dalam bentuk senyawa kompleks dengan ion Fe(III) agar asam salisilat dapat masuk ke ruang antar lapis lempung. Pada proses interkalasi tahap pertama, konsentrasi interkalat divariasikan dengan tujuan mendapatkan nanokomposit yang memliki karakter kimia fisik yang terbaik. Sifat kimia fisik nanokomposit lempung bentonit-asam salisilat dikarakterisasi dengan menggunakan metode difraksi sinar X, FTIR. Pada tahap kedua dilakukan proses interkalasi dengan waktu reaksi yang bervariasi. Dari data XRD didapatkan bahwa variasi konsentrasi interkalat tidak menyebabkan perubahan kristalinitas yang signifikan. Ketiga komposit yang terbentuk menunjukkan puncak difraktogram yang sama dengan bentonit awal. Interkalasi asam salisilat ke dalam ruang antar lapis lempung bentonit menyebabkan peningkatan jarak antar lapis (d basal spacing) menjadi 16-17Å. Dari spektra IR dapat dilihat beberapa pita absorpsi yang karakteristik untuk lempung dan modifikasinya. Pita serapan pada bilangan gelombang 3620 cm-1 menunjukkan vibrasi stretching dari –OH untuk Al-OH pada montmorillonit. Bilangan gelombang 1640 cm-1 mengindikasikan adanya –OH bending dari air yang terabsorpsi. Pada ketiga spektra di atas terjadi pergeseran bilangan gelombang ke, (a). 1631,78 cm-1 (b). 1635,64 cm-1 dan (c). 1633,7 cm-1. Pita serapan pada bilangan gelombang 1115 cm-1 mengindikasikan adanya Si-O stretching untuk lapisan-lapisan silikat. Pada nanokomposit yang dihasilkan terjadi pergeseran bilangan gelombang tersebut ke 1109,7 cm-1(a), 1111cm-1 (b dan c). Pita serapan pada bilangan gelombang 1633,71 cm-1, 1631,78 cm-1dan 1635 cm-1 pada ketiga spectra di atas menunjukkan adanya vibrasi dari gugus C=O yang berasal dari asam salisilat. Adanya pita serapan pada bilangan gelombang 920 cm-1 mengindikasikan vibrasi bending dari Al-Al-OH. Karakterisasi dengan FTIR menunjukkan bahwa pemanasan dari 120°C hingga 250°C tidak mengakibatkan perubahan struktur yang ditunjukkan dengan tidak adanya pergeseran pita vibrasi yang dimilki oleh masing-masing gugus fungsi dari nanokomposit lempung bentonit asam salisilat
DEGRADASI FOTOKATALITIK FENOL MENGGUNAKAN FOTOKATALIS ZnO DAN SINAR UV Dessy Gilang Permata; Ni Putu Diantariani; Ida Ayu Gede Widihati
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.149 KB) | DOI: 10.24843/JCHEM.2016.v10.i02.p13

Abstract

Telah dilakukan penelitian mengenai degradasi fotokatalitik fenol menggunakan fotokatalis ZnO dan sinar UV. ZnO disintesis menggunakan metode pengendapan dan dikarakterisasi menggunakan Difraksi Sinar-x (XRD) dan Scanning Electron Microscope (SEM). Degradasi fotokatalitik fenol meliputi penentuan pH optimum, jumlah fotokatalis optimum, waktu reaksi optimum, dan efektivitas degradasi fotokatalitik. Hasil karakterisasi XRD menunjukkan ZnO memiliki struktur kristal heksagonal wurtzite dengan ukuran kristal 28,05 nm. Dari hasil karakterisasi SEM menunjukkan ZnO yang dihasilkan berbentuk bulat. Kondisi optimum degradasi fotokatalitik fenol dengan fotokatalis ZnO yaitu pH optimum 8, jumlah fotokatalis ZnO optimum 40 mg, dan waktu optimum radiasi 8 jam. Efektivitas degradasi fotokatalitik fenol pada kondisi optimum sebesar (63,52±3,48)%.  
EKSTRAKSI ZAT WARNA ALAM DARI BONGGOL TANAMAN PISANG (Musa paradiasciaca L.) DENGAN METODE MASERASI, REFLUKS, DAN SOKLETASI Anak Agung Bawa Putra; Ni Wayan Bogoriani; Ni Putu Diantariani; Ni Luh Utari Sumadewi
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.665 KB) | DOI: 10.24843/JCHEM.2014.v08.i01.p18

Abstract

We have conducted research on natural dyes extraction of banana (Musa paradiasiaca L.) weevil. The rendement concentration, its color, and their functional groups were determined using phytochemical test and ultraviolet-visible spectrophotometer. Extraction of natural dyes in the study was conducted by three methods namely maceration, reflux, and soxletation by using four kinds of extracting solvent including water, ethanol, acetone, and n-hexane. Color extract in water was dark brown, in ethanol and acetone was light brown, and in n-hexane was yellow. Each extract obtained by the three methods of each solvent was concentrated, their rendement were determined. The yields obtained by the maceration method using water was 8.12%, ethanol 2.40%, acetone 0.52%, and n-hexane 1.16%. The yields of the reflux method were 8.68%, 1.84%, 1.44%, and 1.04% respectively. The yields of the soxletation method were 4.80%, 1.12%, 0.44%, 0.56% respectively. The phytochemical test showed that the banana weevil dyes contained tannins and flavonoids. Absorption of the wavelength of energy ultra violet – visible detected at a wavelength between 200 nm up to 400 nm.
TEKNIK PENAMPUNGAN DAN FERMENTASI AIR KENCING SAPI BALI DI DESA DAUH YEH CANI, BADUNG MENJADI PUPUK ORGANIK RAMAH LINGKUNGAN IM.S. Negara; Simpen Simpen; Arsa Arsa; Diantariani Diantariani; Miwada Miwada
Buletin Udayana Mengabdi Vol 7 No 1 (2008): Volume 7 No.1 – April 2008
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

ABSTRACT The activity was carried out to put to use of the urine cattle bali with fermented technology. The activity of community servece was ccaried out at Dauh Yeh Cani village, Badung regency, on Suturday, 4 August 2007. The participants from the farmers group at Dauh Yeh Cani village. The demo plots was carried out at KUBE KMM. The material of a demo plots i.e. a removal by product (urine) with feces and than its were fermented.. The products made from the activity were liquied fertilizer organic (clean governunt). The participants were curious to follow all the activities and hope for the team Unud be able to came again with a news information.
BIODEGRADASI DODECYL BENZENA SULFONAT DALAM SISTEM LUMPUR AKTIF I Wayan Budiarsa Suyasa; Ni Putu Diantariani
Bumi Lestari Journal of Environment Vol 9 No 1 (2009)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

The research about biodegradation of dodecyl benzene sulfonat ( DBS) has been conducted by using bacterium of sediment of Tebe River in Denpasar. Goals of research were to determine curve of growth bacterium in DBS media and its ability to degradation of DBS. Determination of research consist of exponential phase of bacterium, measurement of volatyl suspended solid (VSS), biologycal oxygen demand (BOD), and biodegradation rate of DBS. Isolate that isolation from Tebe River of Denpasar was seed in DBS media (1g of DBS ;1,5g of NPK ; and 0,2 g of MgSO4.7 H2O to dissolved in 1 L aquadest) with control of growth by measurement of VSS during 12 hours. Active mud that seeding was used to treat of waste water with DBS content. Counted 200 ml active mud in exponential phase, enhanced by 800 ml of waste with DBS content. Measure value of BOD and DBS content, and analysis its rate of decrease. Result of the research indicate that exponential phase of bacterium at an hour of eight with value of VSS equal to 1421,73 mg /l. During treatment of waste, value of BOD and DBS has decreased from initial. Rate of BOD decrease happened to 3 days that following equation is y = - 0,167 X + 3,932 with rate of decrease is 0,167 mg /l. Rate of degradation of DBS quickly, is indicated to 3 days by following fast equation is y = - 0,306X + 6,714 with rate of degrade equal to 0,306 mg /l.
PENENTUAN KANDUNGAN LOGAM Pb DAN Cr PADA AIR DAN SEDIMEN DI SUNGAI AO DESA SAM SAM KABUPATEN TABANAN NI PUTU DIANTARIANI; K.G. DHARMA PUTRA
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 1 No 2
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

Research on the heavy metal content, Pb and Cr in water and sediment of Ao River in Sam SamVillage, Tabanan Regency have been carried out. Sample of water taken at 8 location per week during 4weeks, while sample of sediment only taken once at 8 location. Determination of metal content of Pb and Crconducted using destruction method with mixture of HNO3 dan HCl (3:1) and analysed with AbsorptionAtomic Spectrophotometer.The result showed that mean metal content of Pb and Cr in water of Ao river at the location aftertextile industry (location 5 until 8) from four times intake of samples have passed enabled boundarythreshold that is 0,03 mg/L for Pb and 0,05 mg/L for Cr. Mean Pb content in sediment at location 1, 2, 3, 4and 5 still under natural content while location 6, 7 and 8 over the natural boundary threshold. Meanwhile forthe Cr metal only at location 8 over the natural boundary threshold. The highest metal content of Pb and Cr insediment and water found at location 8 that is each of 0,496 mg/L and 0,213 mg/L for Pb and Cr in water and141,844 mg/Kg and 33,489 mg/Kg for Pb and Cr in sediment respectively.
BIOSORPTION OF Cr(III) ION ON ALGAE Eucheuma spinosum BIOMASSA I Wayan Sudiarta; Ni Putu Diantariani
Indonesian Journal of Chemistry Vol 8, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.882 KB) | DOI: 10.22146/ijc.21652

Abstract

Studies on biosorption and desorption of Cr(III) on algae (Eucheuma spinosum) adsorbent have been carried out. These studies included determination of biosorbent acidity, optimum pH, contact time of biosorption, isoterm and biosorption capacity, and mechanisms of interaction between Cr(III) and algae (E. spinosum) biosorben. Mechanisms of interaction were evaluated by sequential desorption of Cr(III) on algae biosorben by using aquadest, 1 M HCl and 0.05 M Na2EDTA. The result showed that the total acidity of algae biosorbent was 4.15 ± 0.33 mmol/g, the optimum pH was 3, and the optimum contact time was 20 min. Biosorption capacity of algae (E. spinosum) toward chromium (III) was 57.33 mg/g. The highest desorption of Cr(III) achieved when 1 M HCl was used, i.e. 51,01%, wheareas desorptions using aquadest and 0.05 M Na2EDTA were relatively low, i.e. 2.07% and 2.38% respectively. This result indicates that the main interaction mechanism of Cr(III) on algae was electrostatic attraction.
OPTIMIZATION OF TEMPERATURE OF Urine SAMPLE STORAGE FOR THE ANALYSIS OF METAMFETAMIN CONTENT AND ITS METABOLITS WITH GC-MS I. Mahmudi; N. M. Suaniti; N. P. Diantariani
Jurnal Kimia (Journal of Chemistry) Vol. 17, No.1, Januari 2023
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2023.v17.i01.p04

Abstract

Suhu penyimpanan sangat mempengaruhi hasil analisis sampel metamfetamin menggunakan kromatografi gas dan spektroskopi massa. Optimasi suhu penyimpanan terhadap analisis metamfetamin serta metabolitnya dengan kromatografi gas dan spektroskopi massa telah dilakukan dengan tujuan untuk membandingkan hasil pembacaan dan kadar senyawa metamfetamin pada sampel urin yang berbeda. Sampel urin normal, sampel urin normal yang ditambahkan sabu-sabu, dan sampel urin pengguna masing-masing dikumpulkan sebanyak 60 mL. Hasil uji pendahuluan menunjukkan sampel urin normal negatif MA, sampel urin normal yang ditambahkan sabu-sabu dan sampel urin pengguna sabu-sabu positif MA, kemudian masing-masing sampel dibagi tiga kelompok untuk analisis langsung dan disimpan dalam suhu 4 dan 25oC selama 14 hari. Hasil analisis dengan kromatogarfi gas, pada kromatogram sampel urin normal tidak terdeteksi adanya serapan senyawa MA maupun metabolitnya hanya muncul serapan seperti 9-octadecenamide, hexadecanamide, dodecanamide, dan tetradecanamide yang merupakan puncak serapan dari lemak essensial. Sementara pada kromatogram sampel urin normal yang ditambahkan sabu-sabu dan sampel urin pengguna muncul puncak senyawa MA pada Rt 5,27-5,28 tetapi metabolit MA yaitu amfetamin hanya muncul pada kromatogram sampel urin pengguna yaitu pada Rt 5,07-5,08. Data hasil analisis kromatografi gas didukung oleh data pecahan m/z 44, 58, 91, dan 134 yang merupakan pecahan khas senyawa MA dan m/z 44, 65, 91, dan 120 yang menunjukkan pecahan khas amfetamin. Suhu 4oC merupakan suhu optimum dalam penyimpanan sampel urin pengguna sabu-sabu area tidak terjadi penurunan kadar MA yang signifikan. Kata kunci: Amfetamin, gas kromatografi, metamfetamin, sampel urin, spektroskopi massa. ABSTRACT The storage temperature of the methamphetamine samples has significantly influenced the analysis results of the samples using gas chromatography and mass spectroscopy. Optimization of the storage temperature for analysis of the methamphetamine and its metabolites by gas chromatography and mass spectroscopy has been done aiming to compare the level of methamphetamine compound in different urine samples. Normal urine samples, normal urine samples added with methamphetamine, and urine samples of the methamphetamine users were each collected as much as 60 mL. The result of the methamphetamine-screening test showed that the normal urine samples were negative but the normal urine samples added with methamphetamine and urine samples of the methamphetamine users were positive. Each sample was then divided into three groups for direct analysis and stored at 4 and 25 oC for 14 days. The methamphetamine analysis using gas chromatography showed that the chromatogram of the normal urine samples did not show any absorption of methamphetamine or its metabolites. Still, the absorption of 9-octadecenamide, hexadecanamide, dodecanamide, and tetradecanamide was detected, which were the absorption peaks of essential fats. Meanwhile, the chromatogram of the normal urine added with methamphetamine and the urine samples of the methamphetamine users indicated the peak of methamphetamine compound detected at Rt 5.27-5.28, however, the amphetamine (methamphetamine’s metabolite) peak was only detected at the chromatogram of the urine samples of the methamphetamine user, which was at Rt 5.07-5.08. The data of the gas chromatography analysis were supported by the fraction of m/z 44, 58, 91, dan 134 which were typical fractions of methamphetamine, and m/z 44, 65, 91, dan 120 were typical fractions of amphetamine. The results showed that the temperature of 4 oC was the optimum temperature for storing urine samples of methamphetamine users because there was no significant decrease in methamphetamine levels. Keywords: Amphetamine, gas chromatography, mass spectroscopy, methamphetamine, urine sample.
Co-Authors A. A. Bawa Putra Arsa Arsa Dessy Gilang Permata Dewa Ayu Wismayanti Dwi Ariani Yulihastuti I G. A. A. Ratih Megasari I Gusti Ayu Adesia Saraswati I Made Siaka I Nengah Simpen I Nyoman Sumerta Miwada I W BUDIARSA SUYASA I Wayan Sudiarta I. A. Gede Widihati I. G. Eka Saputra Jaya I. Mahmudi Ida Ayu Gede Widihati IM.S. Negara Iryanti Eka Suprihatin Ketut Gede Dharma Putra N. K. Elantiani N. W. Bogoriani Ni Luh Utari Sumadewi Ni Made Puspawati Ni Made Suaniti Putu Suarya Sri Rahayu Santi Yuliana Farhatun Nikmah