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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Bumi Lestari Ecotrophic, Journal of Environmental Science Jurnal Sains Materi Indonesia Jurnal Teknik Kimia Indonesia Chimica Acta Jurnal Media Sains Bulletin of Chemical Reaction Engineering & Catalysis

Iryanti Eka Suprihatin

1. Magister Kimia Terapan, Pascasarjana Universitas Udayana, Denpasar, Indonesia 2. Jurusan Kimia FMIPA, Universitas Udayana, Bukit Jimbaran, Denpasar, Indonesia

Author-ID : 393931

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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KANDUNGAN LOGAM BERAT TOTAL Pb DAN Cd DALAM SEDIMEN DAN BUAH PEDADA (Sonneratia alba) DI MUARA SUNGAI BADUNG N. K.D.S. Widari; I M. Siaka; I. E. Suprihatin
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This paper discusses the total contents of Pb and Cd metals in sediment and pedada fruit (Sonneratia alba) collected from Estuary of Badung River. Wet digestion method using reverse aqua regia was performed to extract the metals. All metals were measured using Atomic Absorption Spectrophotometer (AAS). The results showed that the total contents of Pb and Cd in the sediments were 288.0131-376.0544 and 1.4849-7.0230 mg/kg, respectively, while in the pedada fruit were 160.0212-245.4012 and 3.8151-14.6917 mg/kg, respectively. Based on the results, the content of Pd and Cd in the sediment and pedada fruit in the area of Badung River Estuary exceeded the limits allowed indicating that the sediment and the pidada fruts are polluted by Pb and Cd metals

SPESIASI DAN BIOAVAILABILITAS LOGAM BERAT Pb DAN Cu DALAM TANAH PERTANIAN DI DESA SUKAWANA, KINTAMANI K. A. P. D. Putra; I M. Siaka; I. E. Suprihatin; K. Wardani
Jurnal Kimia (Journal of Chemistry) Vol. 16, No.1, Januari 2022
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.2022.v16.i01.p09

Tanah pertanian yang sering diberi pupuk anorganik maupun organik cenderung tercemar oleh logam berat yang terkandung dalam pupuk tersebut. Logam berat dalam tanah, terutama yang bersifat bioavailable dapat terserap dan masuk ke bagian tanaman yang tumbuh di tanah tersebut. Penelitian ini bertujuan untuk menentukan kandungan logam Pb dan Cu total serta bioavailabilitas kedua logam tersebut dalam tanah pertanian untuk berbagai jenis sayuran di Desa Sukawana, Kintamani, Bali-Indonesia. Metode ekstraksi bertahap digunakan untuk melakukan spesiasi Cu dan Pb dan teknik Atomic Absorption Spectrometry digunakan untuk pengukuran absorbansi kedua logam. Hasil penelitian menunjukkan bahwa kandungan logam Pb dan Cu total dalam sampel tanah pertanian berturut-turut (40,3607-167,4051) mg/kg dan (26,7679-35,7764) mg/kg. Hasil spesiasi menunjukkan bahwa fraksi labil (F1) paling rendah untuk kedua logam, fraksi reducable (F2) lebih kecil dari fraksi oxidicable (F3) baik untuk logam Pb maupun Cu, sedangkan fraksi terbesar adalah fraksi inert (F4) untuk Pb dan fraksi oxidicable (F3) untuk Cu dengan kata lain: F4>F3>F2>F1 untuk Pb dan F3>F2>F4>F1 untuk Cu. Logam Pb dan Cu yang bioavailable (F1) jauh lebih kecil dibandingkan dengan jumlah logam yang berpotensi bioavailable (F2 dan F3). Persentase logam Pb dan Cu yang berpotensi bioavailable berturut-turut berkisar antara (47,57-53,38)% dan (88,29-95,70)%. Persentase logam Pb dan Cu yang rendah pada fraksi bioavailable mengindikasikan bahwa sayuran yang ditanam di area tanah pertanian tersebut aman dari cemaran kedua logam. Kata kunci: bioavailabilitas, Cu, Pb, spesiasi Agricultural soils which are frequently given inorganic or organic fertilizers tend to be polluted by heavy metals contained in the fertilizers. Heavy metals in the soil, especially those being bioavailable, can be absorbed and enter all the parts of the plant growing on the soil. This study aimed to determine the total contents of Pb and Cu as well as the bioavailability of the metals in agricultural soil used for vegetables cultivating in Sukawana Village, Kintamani, Bali-Indonesia. The sequential extraction method was used to perform the speciation of Cu and Pb and the Atomic Absorption Spectrometric technique was used to measure the two metals. The results showed that the total metal contents of Pb and Cu in agricultural soil samples were (40.3607-167.4051) mg/kg and (26.7679-35.7764) mg/kg, respectively. The speciation results showed that the labile fraction (F1) was the lowest for both metals, the reducable fraction (F2) was smaller than the oxidicable fraction (F3) for both Pb and Cu, while the largest fraction was the inert fraction (F4) for Pb and the oxidicable fraction (F3) for Cu, in other words: F4>F3>F2>F1 for Pb and F3>F2>F4>F1 for Cu. The bioavailable Pb and Cu (F1) were much smaller than the amount of metals being potentially bioavailable (F2 and F3). The percentages of potentially bioavailable Pb and Cu metals ranged from (47.57-53.38)% and (88.29-95.70)%, respectively. The low percentage of Pb and Cu in the bioavailable fraction indicated that vegetables planted in the agricultural land area were safe from contamination of both metals. Keywords: bioavailability, Cu, Pb, speciation

BENTONIT-Fe3O4 SEBAGAI FOTOKATALIS DALAM PROSES FOTODEGRADASI NAPHTHOL BLUE BLACK DENGAN IRADIASI UV I. E. Suprihatin; N. D. Murdani; I W. Suarsa
Jurnal Kimia (Journal of Chemistry) Vol. 15, No.1, Januari 2021
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.2021.v15.i01.p09

Bentonit adalah salah satu jenis bahan yang umum.digunakan sebagai penyerap limbah zat warna. Namun, masih terdapat kesulitan dalam pemisahan dan pengumpulan kembali..adsorben setelah proses penyerapan. Oleh karena itu, dalam penelitian ini bentonit dijadikan komposit dengan oksida besi yang bersifat magnetik untuk mengatasi masalah tersebut. Penelitian ini bertujuan untuk mendegradasi zat warna Naphthol blue black menggunakan bentonit-Fe3O4 sebagai fotokatalis bukan sekedar adsorben.. Penelitian ini.meliputi penentuan.massa bentonit-Fe3O4 optimum, pH optimum, waktu iradiasi optimum, serta..efektivitas.fotodegradasi..pada kondisi optimum...Hasil penelitian menunjukkan bahwa..kondisi..optimum..yang diperoleh yaitu massa bentonit-Fe3O4 sebesar 50 mg, pH. 5 dan waktu iradiasi dengan sinar UV adalah 30 menit. Persentase fotodegradasi pada kondisi optimum sebesar 98,95±0,01% yang menunjukkan fotodegradasi menggunakan fotokatalis bentonit-Fe3O4 efektif menurunkan konsentrasi zat warna Naphthol blue black... Kata kunci: fotodegradasi, katalis bentonit-Fe3O4, Naphthol blue black Bentonite is one of the best adsorbents for dye waste. However, there is a problem in separating and re-collecting the adsorbent.after the adsorption process. Therefore, in this research bentonit was composited with Fe3O4 which was paramagnetic and used as a photocatalyst instead of adsorbent. This study aimed to degrade Naphthol blue black dyes using the bentonite-Fe3O4 photocatalysts. In this research the bentonite-Fe3O4 photocatalyst was used to assist the photodegradation of blue-black naphthol using UV light. The study included the determination.of the optimum conditions namely the mass of bentonite-Fe3O4,.pH, and irradiation time, as well as the effectiveness of photodegradation under the..optimum conditions...The result of the study showed that the optimum conditions obtained were as follows: the mass of bentonite-Fe3O4 of 50 mg, pH 5, and the irradiation time of 30 minutes. The effectiveness of photodegradation under the optimum conditions was 98.95±0.01%. This indicated that.photodegradation method using bentonite-Fe3O4 as the photocatalysts effectively decreased the concentration of Naphthol Blue Black dyes in the waste. Keywords: bentonit-Fe3O4 catalyst, Naphthol blue black, photodegradation

PENGOLAHAN AIR LIMBAH PEMBANGKIT LISTRIK PT INDONESIA POWER DENGAN METODE FLOTASI DAN BIOFILTRASI SARINGAN PASIR TANAMAN I Wayan Budiarsa Suyasa; Iryanti Eka Suprihatin; I Gusti Ayu Kd Ravika Sugianthi
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 2012
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 (173.134 KB)

The research about treatment on PT Indonesia Power waste water from power plant operations by flotation method and biofiltration has been carried out. This research aim to determine the optimal aeration time on the flotation process, the optimal residence time of the biofiltration to decrease the oil content and COD of waste water samples, and the capacity of the biofilter to decrease oil content and COD.The result of research shows that the optimum timing of aeration in the flotation process is 20 minutes, during which it decreases the oil content by 20.433,33 mg/L (94,60%), whereas the time to reduce the oil content to 450 mg/L is 60 minutes. Optimal residence time of waste water treatment by the sand filters is 6 hours by decreasing the oil contents to 366,67 mg/L (81,48%) and COD to 50,456 mg/L (51,08%). The time needed to reduce the oil content to 0 mg/L is 36 hours and COD to 28,084 mg/L is 48 hours. Oil content and COD of the flotation effluents and sand – biofiltration are below the thres hold of Class III Water Quality Guide lineaccording to PerGub Bali in 2007 (1 mg/L and 50 mg/L respectively). Treatment capacity of sand filter plant to reduce oil content is 8333,33 ppm/m3 hours, while to decrease COD the treatment capacity is 1295,78 ppm/m3 hours.

QUALITY CONTROL OF GC PERFORMANCE FOR STEROID ANALYSIS Iryanti Eka Suprihatin
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 2 Juli 2011
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 (120.313 KB)

This paper reports the process conducted to maintain a high quality of GC responses in obtaining reliabledata on steroid analyses of environmental samples. Works including setting up the Limit of Detection (LOD) andLimit of Quantitation (LOQ), maintaining linearity, controlling the reproducibility, and determining its reliability aredescribed. It is evident that in this work the LOD of the GC is 0.0002 ng (by 1 mL injection of 0.2 mgL-1 samples) andthe LOQ is 0.001 ng (by 1 mL injection of 1 mgL-1 samples), which means it is capable of detecting much lowerconcentrations of steroid compounds if the samples undergo 2000 times pre-concentration during preparation. Underthe range investigated the GC provides reliable quantitative linear responses to all steroid compounds.

LOGAM KROMIUM (Cr) dan SENG (Zn) DALAM AKAR, BATANG, DAN DAUN TUMBUHAN MANGROVE Rhizophora apiculata DI MUARA SUNGAI BADUNG Iryanti Eka Suprihatin; Manuntun Manurung; Devi Mayangsari
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Cr and Zn contents in the roots, trunks and leaves of the Rhizophora apiculata in estuary of Badung river have been investigated. This study was aimed to determine the ability of Rhizophora apiculata in accumulating heavy metals from the ecosystem. The concentrations of Cr and Zn in the water, sediments, roots, trunks and leaves were determined by the use of Atomic Absorption Spectrophotometer. The results showed that the highest concentrations of both Cr and Zn were found in leaves of the Rhizophora apiculata. Total Cr dan Zn concentrations in the roots were 2,49±0.19 and 19,4 ± 0,06 mg/kg respectively and in the trunks were 3,26 ± 0,28 and 4,14±0,32 mg/kg respectively, while in the leaves were 4,45 ±0,07 and 38,72 ±0,03 mg/kg respectively. The water and sediment contents of the metals were reported separately, and they were much lower than those in the plant samples. Upon comparing these values, it can be suggested that the Rhizophora apiculata was capable of accumulating heavy metals present in its environment.

SPESIASI DAN BIOAVAILABILITAS LOGAM Cu DAN Zn DALAM PERAIRAN DAN SEDIMEN MUARA SUNGAI BADUNG PADA JALUR TAMAN HUTAN RAYA NGURAH RAI DENPASAR BALI Dewa Ayu Puspasari; Iryanti Eka Suprihatin; I G. A. Kunti Sri Panca Dewi
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Metal concentration in water enviroment and sediment cannot give sufficient information about bioavailability of those metals in the waterworks. The aims of this study are to determine the bioavailability and specification of Cu and Zn in water enviroment and sediment in the estuary of Badung river in the “Taman Hutan Raya Ngurah Rai” Denpasar, Bali area. Determination of bioavailability and speciation of those metals were accomplished by sequencial extraction method. The results of this study show that total concentrations of Cu, and Zn in the water samples are 0,1792 mg/L, and 0,0647 mg/L. The sum of the fraction of non-resistant and resistant fractions of Cu and Zn in the sediment obtained in this study indicates the total concentration of metals in the sediment, i.e 33,9036 mg / kg and 50,8296 mg/kg. Results of the metal speciation are as follow: fraction of Cu is dominated by resistant fraction that is 64,38 %, whereas non-resistant fractions are: 3,70 % for acid reducible and 31,89% for oxidisable organic. Fraction of Zn is dominated by acid reducible fraction of 39,27 %, followed by organic oxidisable of 25,46 % and EFLE fraction of 1,80%, whereas the resistant fraction is 33,47 %. The percentages of Cu and Zn bioavailabilities respectively are 35,59 % ; and 66,53 %.

PEMBUATAN BIOETANOL DARI KUPASAN KENTANG (Solanum tuberosum L.) DENGAN PROSES FERMENTASI Devi Esteria Hasianna Purba; Iryanti Eka Suprihatin; A.A.I.A. Mayun Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Ethanol fermented from potato peels is proposed as one alternative source of renewable energy called bioethanol. In this research bioethanol was produced through four stages namely acid hydrolysis, detoxification, fermentation and distillation. The acid hydrolysis process was carried out using sulphuric acid at 100oC for 60 minutes. The detoxification process was carried out by adding NH4OH into the hydrolyzate prior to fermentation. Distillation was performed up to 100oC and the distillate with the BP of 78-84oC was determined for its ethanol content using gas chromatography. The ethanol produced from 5 grams of dried potato peels through fermentation for 4, 5, 6, and 7 days 3.54%; 4,85%; 5,35%; and 6.15% respectively.

RIZODEGRADASI UNTUK MINIMALISASI BOD, COD, KANDUNGAN DERTERGEN DAN LEMAK LIMBAH CAIR RUMAH MAKAN N. G. A. M. D. A. Suastuti; I. E. Suprihatin; W. D. Sulihingtyas; A. A .I .A. M. Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol.12 No.2 Juli 2018
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Penelitian ini bertujuan untuk mengetahui efektivitas dan kapasitas pengolahan limbah cair rumah makan dengan sistem rizodegradasi lahan basah yang menggunakan tanaman kangkungan (Ipomoea crassicaulis). Sistem ini dibuat dengan menanam stek tanaman kangkungan dalam bak ekosistem lahan basah. Air limbah ditentukan COD, BOD, konsentrasi lemak dan detergennya sebelum dan setelah pengolahan. Sebelum pengolahan, terlebih dahulu ditentukan pH kerja optimumnya. Limbah cair rumah makan diatur pH nya kemudian dialirkan ke dalam bak ekosistem lahan basah. Pengolahan air limbah dilakukan selama 6, 12, 18 dan 24 jam, dan pada setiap jangka waktu diambil sampel untuk diukur BOD, COD, konsentrasi detergen dan lemaknya. Hasil penelitian menunjukkan pH optimum dicapai pada range 6 – 8. Nilai BOD, COD, konsentrasi lemak dan detergen dalam limbah sebelum diolah berturut-turut 246; 573,34; 128,0, dan 7,38 ppm, dengan pH 4,43. Selama pengolahan terjadi penurunan konsentrasi polutan, dengan penurunan terbesar terjadi pada waktu pengolahan 24 jam, yaitu sebesar 44,95; 72,8; 36,5 dan 3,49 ppm untuk BOD, COD, konsentrasi lemak dan detergen. Efektivitas ekosistem lahan basah untuk menurunkan COD, BOD, lemak dan detergen berturut-turut sebesar 79,59%, 74,75%, 46,22% dan 35,39%. Kapasitas pengolahan ekosistem lahan basah untuk penurunan COD, BOD, lemak dan detergen berturut-turut sebesar 2,359; 1,108; 0,263 dan 0,016 ppm/L jam

DEGRADASI KOLESTEROL DAN KOPROSTANOL DALAM SEDIMEN SUNGAI Iryanti Eka Suprihatin
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 2 Juli 2010
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 (90.968 KB)

Cholesterol and other steroid compounds like coprostanol, epicoprostanol, have been used as sourceindicator for fecal pollution in aquatic environments. This is because of the unique steroid composition of animalfeces. To determine the source of fecal pollution, the ratios of steroid compounds in the sample are used. Thus anyreaction or changes to any steroid compound in the environment will affect the determination. In this paper a studyon the interconversion of cholesterol and coprostanol in river sediments is reported. The study suggests that there isno such changes that any steroid compounds detected in a sediment sample will show their primary sources. Thisimplies that the composition or ratio of the compounds can be used as source indicator for fecal pollution. The studyalso found that both cholesterol and coprostanol degradation are first order with rate constants of0,063[kolesterol]mgL-1day-1 and 0.045[kop]t mgL-1day-1 respectively.

Co-Authors A. A. Sg. Istri A. Suwandewi Anak Agung Istri Agung Mayun Laksmiwati Anak Agung Putri Cintya Paramitha Utari Antariksa, Najwa Kusuma Putri Arik Agustina B. Ankamwar Darmayasa, Dewa Komang Devi Esteria Hasianna Purba Devi Mayangsari Dewa Ayu Puspasari Didik Setiawan Dina Lindawati Purba Emmy Sahara Ermin Riskiani Gusti Ayu Dewi Lestari Gusti Ayu Putu Prima Purnamasari Henu Sumekar I Dewa Ketut Sastrawidana I G. A. K. S. P. Dewi I Gede Mahardika I Gusti Ayu Kd Ravika Sugianthi I Gusti Ayu Kunti Sri Panca Dewi I Gusti Lanang Wiratma I Gusti Ngurah Raka Aryawan I M. G. Sudyadnyana Sandhika I Made Siaka I Nengah Wirajana I Nyoman Sujana I W BUDIARSA SUYASA I W. Wiratama I Wayan Suarsa I. A. Gede Widihati I. M. S. Negara Ida Bagus Made Asmara Dwipa Ida Bagus Putra Manuaba Intan Wahyuni, Pande Made Irdhawati Irdhawati Ita Hidayatus S James Sibarani K. A. P. D. Putra K. D. Cahyadi K. Wardani Kadek Duwi Cahyadi Ketut Gede Dharma Putra Kunti Sri Panca Dewi, I Gusti Ayu Lisdiantari, Ni Luh Gede Luh Pt Widya Kalifika Devi Luh Putu Desy Udayani Made Arie Kusuma Dewi Manuntun Manurung N. D. Murdani N. K.D.S. Widari N. L. G. A. Sunariani N. W. S. P. Dewi Ni G. A. M. Dwi Adhi Suastuti Ni Ketut Esati Ni Komang Ariati Ni Luh Putu Mustika Praptiwi Ni Made Suaniti Ni Nyoman Trisnawati Ni Putu Ayu Dwijayanti, Ni Putu Ayu Susilawati Ni Putu Diantariani Oka Ratnayani Olivia Carolyn Sitepu P. B. Limbong Putu Suarya R. M. Suat Rahayu, Riana Suastari regi mahendra W. D. Sulihingtyas Wahyu Dwijani S. Wahyu Dwijani Sulihingtyas Wahyu Dwijani Sulihingtyas Welhelmus Djo, Yuliana Herman WIWIK SUSANAH RITA Y. P. Mau Yuliana Herman Welhelmus Djo

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