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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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BIOSORPSI Cr(III) PADA BIOSORBENT SERAT SABUT KELAPA HIJAU TERAKTIVASI ASAM NITRAT Sudiarta, I Wayan; Diantariani, Ni Putu; Yulihastuti, Dwi Ariani
CHEMISTRY PROGRESS Vol 5, No 1 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.1.2012.650

Abstract

Sudiarta dkk., 2012. Biosorpsi Cr(III) pada biosorbent serat sabut kelapa hijau teraktivasi asam nitrat. Telah dilakukan penelitian biosorpsi Cr(III) pada biosorben serat sabut kelapa hijau (cocos mucifera) teraktivasiasam nitrat. Penelitian ini meliputi penentuan rasio optimum asam nitrat:biosorben dalam aktivasi, penentuankeasaman permukaan biosorben teraktivasi asam nitrat, penentuan kondisi optimum biosorpsi Cr(III) padabiosorben teraktivasi asam yang meliputi pH optimum dan waktu kontak optimum, penentuan isoterm dankapasitas biosorpsi Cr(III) pada biosorben teraktivasi asam nitrat. Hasil penelitian menunjukkan bahwa aktivasibiosorben optimum terjadi pada rasio mmol asam nitrat : gram biosorben = 5 : 1. Keasaman permukaanbiosorben teraktivasi asam nitrat adalah 9,94± 0,33 mmol/g dan biosorben tanpa aktivasi adalah 5,3 ± 0,01mmol/g. pH optimum biosorpsi Cr(III) pada masing-masing biosorben adalah 3 dan waktu kontak optimumbiosorpsi Cr(III) pada biosorben teraktivasi asam nitrat adalah 60 menit dan biosorben tanpa aktivasi adalah120 menit. Kapasitas biosorpsi Cr(III) pada biosorben teraktivasi asam nitrat dan tanpa aktivasi adalah 13,74mg/g dan 11,91 mg/g.Kata kunci : biosorpsi, serat sabut kelapa, aktivasi, Cr (III), kapasitas biosorpsiSudiarta et al., 2012. Chromium (III) biosorption on nitric acid-biosorbent activated green coco fibre. Studies on biosorption of Cr (III) on nitric acid-biosorbent activated of green coco fibre (Cocos mucifera) had been carried out. These studies included determination of the optimum ratio of nitric acid: biosorben inactivation, the determination of surface acidity of nitric acid-biosorbent activated, determination of the optimumconditions of biosorption Cr(III) on activated biosorbnet that includes the optimum pH and the optimum contacttime, determinatiion of the isotherm and capacity biosorpsi of Cr (III ) on nitric acid-biosorbent activated.Theresults show that the activation occurs at the optimum ratio of mmol nitric acid: gram biosorbent was 5: 1. Thesurface acidity of nitric acid-biosorbent activated was 9.94 ± 0.33 mmol / g and unactivated biosorbent was 5.3± 0.01 mmol / g. The optimum pH biosorption of Cr(III) on each biosorbent is 3 and the optimum contact timebiosorption of Cr(III) on nitric acid-biosorbent activated was 60 minutes and unactivated biosorbent was 120minutes. The capacity biosorption of Cr(III) on nitric acid-biosorbent activated and unactivated biosorbnet were13.74 mg/g and 11.91 mg/g.Keywords : biosorption, coconut fibre, activation, Cr(III), capacity biosoprtion
SYNTHESIS OF ZnO-AC COMPOSITE AND ITS USE IN REDUCING TEXTILE DYES CONCENTRATIONS OF METHYLENE BLUE AND CONGO RED BY PHOTODEGRADATION Ni Putu Diantariani; Iryanti Eka Suprihatin; Ida Ayu Gede Widihati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 4 No 1 (2016)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Telah dilakukan penelitian mengenai minimalisasi konsentrasi zat warna tekstil metilen biru (MB) dan congo red (CR) melalui fotodegradasi menggunakan komposit ZnO-Arang aktif (ZnO-AC). Penelitian meliputi sintesis seng oksida (ZnO) dengan berbagai rasio pelarut (air:etanol), pembuatan komposit ZnO-AC, dan penerapan komposit untuk mengurangi konsentrasi MB dan CR dalam limbah buatan melalui proses fotodegradasi. Karakterisasi dari partikel ZnO hasil sintesis dilakukan dengan Fourier Transformed Infra Red (FTIR), X-Ray Diffraction (XRD), dan Scanning Electron Microscope (SEM). Fotodegradasi zat warna tekstil MB dan CR dilakukan dengan memaparkan campuran zat warna dan komposit di bawah radiasi sinar ultraviolet. Intensitas warna sebelum dan sesudah fotodegradasi ditentukan dengan menggunakan spektrofotometer sinar tampak. Hasil menunjukkan bahwa semakin besar rasio pelarut air:etanol yang digunakan dalam sintesis ZnO, semakin mudah, cepat dan semakin banyak jumlah ZnO yang terbentuk. Spektra FTIR dari ZnO hasil sintesis menunjukkan adanya gugus fungsi Zn-O, O-H, N-H, C-H, dan C-O. Semua puncak difraksi dari ZnO hasil sintesis yang pada 2 31,79-31,91, 34,45-34,57, dan 36,27-36,40 sesuai dengan ZnO Wurtzite fase heksagonal. Karakterisasi ZnO dengan SEM menunjukkan bahwa bentuk partikel ZnO adalah bulat dan ukuran partikelnya berkisar 220,5 nm sampai 1222 nm. Bentuk partikel yang paling mendekati bulat dihasilkan oleh perlakuan sintesis dengan rasio pelarut etanol: air sebanyak 150 mL:150 mL. Persentase fotodegradasi dari MB dan CR dengan komposit ZnO-AC lebih besar dibandingkan dengan kontrol (tanpa komposit ZnO-AC), dengan persentase tertinggi diberikan oleh komposit yang terbuat dari ZnO yang disintesis dengan rasio pelarut air : etanol sebesar 150 mL:150 mL. ABSTRACT: Research on minimization of textile dyes concentration of methylene blue (MB) and congo red (CR) through photodegradation using ZnO-Activated Carbon (ZnO-AC) composite has been done. The research included synthesis of Zinc oxide (ZnO) with various solvent ratio (water: ethanol), synthesis of ZnO - AC composite, and the application of the composite to reduce the concentrations of MB and CR in the artificial waste by photodegradation process. The characteristics of the zinc oxide particle were determined by Fourier Transformed Infra Red (FTIR), X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Photodegradation of the textile dyes was carried out by exposing the mixture of the dyes and the composite to the Ultraviolet light. The colour intensities before and after exposure were determined by using visible spectrophotometer. The result show that the greater thewater:ethanol ratio is used, the easier, faster and more ZnO formed. FTIR spectra of the synthesized ZnO indicate the presence of the functional groups of Zn-O, O-H, N-H, C-H and C-O. All the diffraction peaks of synthesized ZnO that located at 2 31.79-31.91, 34.45-34.57, and 36.27-36.40 are consistent with the hexagonal phase wurtzite ZnO. Characterization of ZnO with SEM show that the particle shape of the synthesized ZnO is spherical and the sizes of particles are 220,5 nm to 1222 nm. The nearest spherical shape is resulted by water:ethanol ratio of 150 mL:150 mL. The photodegradation percentages of MB and CR with ZnO-AC composite are higher than those without ZnO-AC composite, with the highest percentages given by the composite made of ZnO that is synthesized with water:ethanol ratio of 150 mL: 150 mL.
PENINGKATAN POTENSI BATU PADAS LADGESTONE SEBAGAI ADSORBEN ION LOGAM BERAT Cr(III) DALAM AIR MELALUI AKTIVASI ASAM DAN BASA N. P. Diantariani
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 1 Januari 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 (118.605 KB)

Abstract

The research with aim to increase potency of natural batu padas of Ladgestone type through activation usedby acid (H2SO4) and basa (NaOH) various concentrations (2.0; 4.0; and 6.0N) to adsorption ability of heavy metalion of Cr(III) in water have been done. Acid and base activated batu padas was characterizated of specific surfacearea with blue methylen method, whereas surface acidity determined by acid-base titration. Whereas, amount ofCr(III) which can of maximum adsorpted every weight of adsorben or adsorption capacity determined by atomicabsorption spectrophotometer (AAS). The result measurement of activated batu padas compared by batu padaswithout activation (control).Result of research indicate that batu padas after activated by NaOH and of H2SO4 yield surface acidity(active sites) and realtive higher specific surface area compared with without activation (control). Maximumability(capacity) adsorption to Cr(III) was just increasing for NaOH activated batu padas. Highest Capacitiesobtained by NaOH activated batu padas at concentration 4.0N was 2.0265 mg/g.
FOTODEGRADASI FENOL MENGGUNAKAN KOMPOSIT Ag/ZnO YANG DISINTESIS DENGAN METODE KOPRESIPITASI Ni Putu Diantariani; Ida Ayu Gede Widihati
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 (319.903 KB) | DOI: 10.24843/JCHEM.2017.v11.i02.p05

Abstract

Penelitian ini mengenai fotodegradasi fenol dengan menggunakan komposit Ag/ZnO yang disintesis dengan metode kopresipitasi. Penelitian yang dilakukan meliputi sintesis komposit Ag/ZnO, penentuan kondisi optimum fotodegradasi, penentuan efektivitas dan laju fotodegradasi fenol dengan menggunakan fotokatalis komposit Ag/ZnO. Hasil penelitian menunjukkan bahwa metode kopresipitasi dapat menghasilkan komposit Ag/ZnO dengan persentase Ag dalam komposit sebesar 3,4%. Komposit Ag/ZnO yang dihasilkan mempunyai aktivitas fotokatalitik yang tinggi. Kondisi optimum proses fotodegradasi fenol dengan komposit Ag/ZnO yaitu menggunakan komposit Ag/ZnO sebanyak 50 mg, pH larutan fenol 7 dan diradiasi dengan sinar UV selama 8 jam. Efektivitas fotodegradasi fenol rata-rata dengan fotokatalis komposit Ag/ZnO pada kondisi optimum sebesar (82,88±0,41)%.
FOTODEGRADASI ZAT WARNA TEKSTIL CONGO RED DENGAN FOTOKATALIS ZnO-ARANG AKTIF DAN SINAR ULTRAVIOLET (UV) I Gusti Ayu Adesia Saraswati; Ni Putu Diantariani; Putu Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
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 (89.199 KB) | DOI: 10.24843/JCHEM.2015.v09.i02.p06

Abstract

The research was conducted to study photodegradation of congo red textile dyes by using photocatalyst ZnO-activated carbon and UV light. The parameters observed were optimum quantity of the photocatalyst ZnO-activated carbon, optimum pH, optimum radiation time, reaction rate constant, and the effectivity of photodegradation congo red. Photocatalyst ZnO-activated carbon was synthesized using sol-gel method with the ratio of ZnO : activated carbon 5:1. The results showed that the optimum condition of photodegradation congo red required 50 mg of photocatalyst ZnO-activated carbon, pH 4, and 5 hours exposured to UV light radiation. The photodegradation rate constant of congo red using photocatalyst ZnO-activated carbon was 0.1745 hours-1 and without photocatalyst was 0.0200 hours-1.  The photocatalyst ZnO-activated carbon in its optimum conditions was effective to reduce congo red textile dyes with 91.81 ± 1.24 percentages of degradation.
FOTODEGRADASI ZAT WARNA TEKSTIL METHYLENE BLUE DAN CONGO RED MENGGUNAKAN KOMPOSIT ZnO-AA DAN SINAR UV Ni Putu Diantariani; Iryanti Eka Suprihatin; Ida Ayu Gede Widihati
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.956 KB) | DOI: 10.24843/JCHEM.2016.v10.i01.p18

Abstract

Research on  photodegradation of textile dyes  of methylene blue (MB) and congo red (CR) using ZnO-Activated Carbon composite and ultraviolet (UV) light has been done. This research included synthesis zinc oxide (ZnO), synthesis ZnO-Activated Carbon, and the application of composite to degrade textile dyes of MB and CR. In this research studied the effect of pH, concentration and time of UV radiation  towards photodegradation percentages  of dyes. Then it determined the rate and the effectivity of photodegradation of MB and CR dyes using ZnO-Activated Carbon composite. The result showed that  photodegradation of MB reach optimal condition at pH 11 with radiation time 4 hour, whereas CR is at pH 5 with the same radiation time. The more initial concentration of MB and CR applicated, the lower of photodegradation percentages. Constanta of photodegradation rate of MB and CR dyes using ZnO-Activated Carbon composite are 0.8316 and 1.4938 hour-1 respectively. ZnO-Activated Carbon composite as a photocatalyst can degrade effectively MB and CR dyes with photodegradation percentages of 99.40±0.23 % and 99.61±0.24% respectively.
PEMBUATAN KOMPOSIT ZnO-ARANG AKTIF SEBAGAI FOTOKATALIS UNTUK MENDEGRADASI ZAT WARNA METILEN BIRU Dewa Ayu Wismayanti; Ni Putu Diantariani; Sri Rahayu Santi
Jurnal Kimia (Journal of Chemistry) Vol. 9, no. 1 Januari 2015
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 (295.282 KB) | DOI: 10.24843/JCHEM.2015.v09.i01.p18

Abstract

Preparation of ZnO-activated carbon composite with a mass ratio of ZnO : activated charcoal of 5:2; 5:1 and 15:2 have been carried out using the sol-gel method The characterisation of  ZnO-activated carbon composite was done by using  X-Ray Diffraction (X-RD) and Fourier Transform Infra Red (FT-IR). The characterization using X-RD showed that the ZnO has an hexagonal crystal structure  with crystal size of 23.13 nm; 23.38 nm and 40.25 nm, while FT-IR spectra showed that there were Zn-O strain, C-O aliphatic, C-H bending, C-C aliphatic  and O-H bending vibrations. ZnO-activated carbon composite was applicated as photocatalyst to degradate  methylene blue by irradiatting  the compound with UV light for 5 hours. The  results showed that the ZnO-activated carbon composite at the ratio of 5:1 at optimum pH of 11 gave the highest percentage of methylene blue degradation which was of 99,97±0,02 %.
FOTODEGRADASI METILEN BIRU DENGAN SINAR UV DAN KATALIS Al2O3 Ida Ayu Gede Widihati; Ni Putu Diantariani; Yuliana Farhatun Nikmah
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 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 (288.412 KB)

Abstract

The research was conducted to observe the photodegradation of methylene blue by UV light and Al2O3 catalyst. The research determinated the optimum Al2O3 catalyst weight, the optimum pH, the optimum radiation duration and the effectivity of photodegradation at optimum conditions. Degradation of methylene blue were analyzed by UV-Vis spectrophotometer. The results showed that the optimum Al2O3 catalyst weight was 40 mg the optimum of pH was 11, and the optimum of radiation duration was 4 hours. The effectivity of photodegradation was (30.22 ± 1.17)%.
MODIFIKASI SILIKA GEL DARI ABU SEKAM PADI DENGAN LIGAN DIFENILKARBAZON I Wayan Sudiarta; Ni Putu Diantariani; Putu Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
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 (457.479 KB) | DOI: 10.24843/JCHEM.2013.v07.i01.p08

Abstract

Modification of silica gel from rice husk ash by diphenylcarbazone ligand have been conducted. This study included synthesis of silica gel from rice husk ash, determination of the optimum ratio of ligand/silica gel, optimum time of silica gel modification The results showed that the modification of silica gel from rice husk ash with diphenylcarbazone has been successfully synthesized, indicated by appearearance of characteristic absorbances of Si-O-Si, Si-OH, -NH, Ar-H, C=O functional groups on the infra red spectra at 1096, 910-830, 3330, 3242, cm-1, and 1660 cm-1, respectively. The optimum of ligand/silica is 0,5 mmol : 0,5 g or 1mmol ligand 1g silica gel, with the modification time of 4 hours.
TOTAL LOGAM Pb DAN Cr DALAM TANAH PERTANIAN DAN AIR DANAU BERATAN SERTA BIOAVAILABILITASNYA DALAM TANAH PERTANIAN DI DAERAH BEDUGUL I. G. Eka Saputra Jaya; I Made Siaka; Ni Putu Diantariani
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 (249.348 KB) | DOI: 10.24843/JCHEM.2014.v08.i01.p05

Abstract

This paper discusses the total metal contents of Pb and Cr in soil of agricultural land and water of Lake Beratan, as well as their bioavailabilities in soil of the land in Bedugul area. This study aims to determine the total metals and the bioavailability of Pb and Cr in the soils of agricultural land in Bedugul area and determine the total metal Pb and Cr in the water of Lake Beratan. The total concentrations of Pb and Cr in soil samples and water of the lake were analyzed by using Atomic Absorption Spectrophotometer (AAS). The bioavailabilities of Pb and Cr in soil samples were also determined and analyzed by AAS. The results showed that the highest total concentrations of Pb and Cr were found in the soil located near the high way, which were 14.6162 mg/kg for Pb and 15.5380 mg/kg for Cr. The total concentration of  Pb and Cr in water of Beratan lake were 0.2802 mg/L and 0.2213 mg/L respectively. Cr metal was more bioavailable compared to Pb metal in the soil of Bedugul area. Bioavailable Pb was detected only in the soil sample collected from the area near the high way, which was about 45% bioavailable (as extracted by HCl) and potentially bioavailable was about 27% (the different percentages of Pb extracted by EDTA and by HCl. On the other hands, bioavailable Cr metal was detected in every soil sample (60-76%) and its potentially bioavailable ranged between 6 and 17%.
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