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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman ALCHEMY Jurnal Penelitian Kimia JURNAL ATOMIK Jurnal Bahan Alam Terbarukan
Noor Hindryawati, Noor
Universitas Mulawarman
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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PREPARATION OF SPENT BLEACHING EARTH-SUPPORTED CALCIUM FROM LIMESTONE AS CATALYST IN TRANSESTERIFICATION OF WASTE FRYING OIL Hindryawati, Noor; Daniel, Daniel; Erwin, Erwin; Maniam, Gaanty Pragas
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.9860

Abstract

An investigation was conducted on palm oil refinery waste-spent bleaching earth (POR-SBE), POR-SBE supported by calcium as catalysts for methyl esters production through transesterification process using waste frying oil. The catalysts showed longer lasting activity than the traditional alkali catalysts. The optimum conditions for the process were: Ca-POR-SBE catalyst amount 7 %; methanol to oil molar ratio 12:1; and a reaction duration is 4 h. The process was able to transesterify oil to methyl esters at 96.8 % conversion at 65 °C. The catalysts were easily separated from the reaction mixture and the final product met selected biodiesel fuel properties in accordance with European Standard EN 14214.
Modification of Spent Bleaching Earth with WO3 and the Application for Photocatalytic Degradation of Waste Dyestuff under Solar Light Hindryawati, Noor; Panggabean, Aman Sentosa; Subagyono, Dirgarini Julia Nurlianti; Putri, Rinda Anisyah; Kusmiaty, Prilianda; Maniam, Gaanty Pragas
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.22023

Abstract

Degradation of blue dye waste in Sarong Samarinda production using WO3-bleaching earth (BE) has been conducted. Structural and morphological characterization has conducted using X-ray diffraction (XRD), and Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX). The X-ray diffraction results show the mineral on bleaching earth is rectorite dioctahedral mica layer and dioctahedral smectite with a ratio 2:1. The WO3 pattern is appeared after the calcination. After calcination at 500°C, the WO3 is deposited homogeneously on the BE surface. The catalytic performance of WO3-BE for photodegradation of the blue dye waste under the solar light is 99.85 % within 1 h.
Preparation of Dye-Sensitized Solar Cell (DSSC) Using TiO2 and Mahkota Dewa Fruit (Phaleria Macrocarpa (Scheff) Boerl.) Extract Hindryawati, Noor; Hiyahara, Irfan Ashari; Saputra, Herdian; Arief, M. Syaiful; Maniam, Gaanty Pragas
Jurnal Bahan Alam Terbarukan Vol 10, No 1 (2021): June 2021 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v10i1.32378

Abstract

A dye sensitized solar cell (DSSC) is a low-cost solar cell with attractive features. DSCC contains of photoelectrode, dye, electrolyte, and counter electrode with photoelectrochemical system. The aim of this research is to determine the percent efficiency produced by DSSC from the Mahkota Dewa extract. This was carried out in various stages, namely sample preparation and extraction, DSSC assembly, TiO2 characterization using Scanning Electron Microscopy (SEM), and testing its current and voltage. The results showed that the maximum wavelength of the Mahkota Dewa extract dye test using a UV-Vis spectrophotometer was 554 nm with an absorbance of 0.163, which was believed to be the wavelength of flavonoid and anthocyanin compounds. Based on the characterization results, surface morphology was spherical and agglomerated. However, after being soaked in the dye, the surface morphology of the TiO2 layer did not appear spherical on the surface that was expected to have been covered by the dye. The measurement using sunlight sources showed that the maximum current and voltage of DSSC with a concentration of 30% w/v was 21.8x10-4A and 58.86 V with an efficiency of 22.43x10-3 %. In addition, there was a 0.482% decrease in DSSC efficiency based on the storage time which lasted for a period of 6 days.
PEMBUATAN KOMPOSIT WO3-ZnO MELALUI REAKSI PADAT-PADAT DAN KARAKTERISASINYA Wahyuni Ramadhani; Noor Hindryawati; Teguh Wirawan
JURNAL KIMIA MULAWARMAN Vol 18 No 2 (2021)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v18i2.955

Abstract

Pembuatan komposit WO3-ZnO melalui reaksi padat-padat telah dilakukan. Tahapan penelitian meliputi pencampuran padatan WO3 dan ZnO dengan penambahan polivinil alkohol, pengeringan, pengayakan dan pemanasan. Padatan WO3 dan ZnO sebelum dikompositkan serta komposit WO3-ZnO dikarakterisasi menggunakan instrumen X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), dan uji luas permukaan menggunakan larutan methylene blue. Hasil karakterisasi XRD menunjukkan bahwa pada sampel mengandung WO3 dan ZnO juga adanya puncak difraksi ZnWO4. Pada analisa SEM dapat diamati bahwa terdapat ukuran dan bentuk partikel yang tidak homogen. Komposit WO3-ZnO memiliki luas permukaan sebesar 110,7596 m2/g.
ISOLATION OF STEROID COMPOUNDS IN THE n-HEKSANA FRACTION FROM JARUM TUJUH BILAH LEAVES EXTRACT (Leuenbergeria bleo (Kunth) D.C.) Yuli Yana; Chairul Saleh; Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 17 No 1 (2019)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v17i1.904

Abstract

This study aims to find secondary metabolites isolated from the leaves of the Jarum Tujuh Bilah (Leuenbergeria bleo (Kunth) D.C.). The method used was maceration, fractionation and column chromatography and was identified using Fourier Transformra Infra Red (FT-IR). The phytochemical preliminary test of the n-hexane fraction contains the steroid secondary metabolite compound. The results of column chromatography produced 75 vial bottles which were then identified by thin layer chromatography and produced 8 combined fractions (A-H fraction) based on the similarity of characterization, from the 8 fractions D and E forming yellow crystals. The yellow crystals formed are then cleaned and recrystallized to produce 11.7 mg white amorphous crystals. Compounds are characterized by FTIR spectrometers. Based on FTIR analysis, isolates showed IR spectrum λ max cm-1: 3375; 2927,98; 2852,18; 1680; 1462,51; 1376.81; 1329.74; 1043,92; 1022.02 and 956.27. Based on the results obtained by isolates, it is suspected that the compound is a steroid sterol.
STUDI KOMPUTASI INTERAKSI ZEOLIT LTA (LINDE TYPE A) DENGAN KATION ALKALI (LI+, NA+, K+) MENGGUNAKAN METODE MEKANIKA MOLEKULER Audi Zahid Iswaradi; Rahmat Gunawan; Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v19i1.1012

Abstract

A study of computation on zeolite LTA (Linde Type A) interaction with alkaline cation (Li+, Na+, K+) using the mechanical molecular method was conducted. Data processing was conducted computationally using Hyperchem 7.0 with the mechanical molecular method. The result of the study showed zeolite LTA with ratio Si/Al 2,4286 has the lowest minimum energy. Furthermore, impregnation by cation Li+ increases structure stability, and impregnation by cation Na+ has the largest diameter window on Zeolite LTA.
SINTESIS DAN KARAKTERISASI SILIKA GEL DARI ABU SEKAM PADI DENGAN MENGGUNAKAN NATRIUM HIDROKSIDA (NaOH) Noor Hindryawati; Alimuddin Alimuddin
JURNAL KIMIA MULAWARMAN Vol 7 No 2 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The synthesis and characterization of silica gel from rice hull ash by using NaOH has been done. The synthesis of silica gel from rice hull ash was done by incineration through a heating for 4 hours with the temperature variation at 700oC, 800 oC, and 900 oC. The product (Rice hull ash) washed with H2SO4 and then continued with Na2EDTA. The silica gel can be synthesized from the rice hull ash by adding H2SO4 solution into the Sodium Silicate (Na2SO3) at temperature 500oC for 30 minutes. The silica gel from the synthesis can be characterized using infrared spectroscopy and X-Ray diffraction. The result of this research showed the same pattern with the comparator silica gel (Kiesel gel 60).
UJI AKTIVITAS ENZIM DEHIDROGENASE LAKTAT (DHL) YANG TERENKAPSULASI DALAM SILIKA DARI ABU SEKAM PADI Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 8 No 2 (2011)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A research has been conducted in testing the enzymatic activity of the encapsulated Lactate dehydrogenase (LDH) in silica by sol-gel process using sodium silicate from rice hull ash. The encapsulation was carried out by mixing sodium silicate (Na2SiO3) sol solution and phosphate buffer pH 7 containing both LDH enzyme and coenzyme of nicotinamide adenine dinucleotide (NAD+). After 2-6 minute of shaking, the mixture was then transferred into a 96-microwell plate and stored overnight. The encapsulation activity of encapsulation product was quantified by measuring absorption of NADH, as coenzyme hydrogenation product, at 340 nm utilizing an ELISA (Enzyme Linked Immunosorbent Assay) reader. For comparison similar experiment was also carried out for free enzyme. The result of the research shows that the kkat for encapsulated LDH enzyme (ET) is smaller than free enzyme (EB), which means that the encapsulation enzyme will affect the velocity of product reaction. The velocity of the encapsulation enzyme (ET) reaction is lower than free enzyme (EB) as the consequence of weak interaction between the substrate and enzyme or influenced by k1.
Adsorption Of Methylene Blue Using Active Charcoal From Empty Fruit Bunch (EFB) Teguh Wirawan; Ishak Wiradikara Az; Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 21 No 1 (2023)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v21i1.1013

Abstract

Research on the adsorption of methylene blue by activated charcoal from Empty Fruit Bunch (EFB) has been carried out. This study aimed to synthesize activated charcoal from EFB, characterize it, and use it as an adsorbent for methylene blue. Activated charcoal was synthesized by carbonation in a furnace at 300oC for 1 hour. Chemically, activation was carried out by immersion in HCl solution for 24 hours. Characterization was carried out by proximate test, determination of functional groups using Fourier Transform Infrared (FT-IR), and determining material shape with X-Ray Diffraction (XRD). The study of activated charcoal adsorption as methylene blue adsorbent was carried out by treating variations in contact time, adsorbent weight, and concentration. The results of the proximate test with the parameters of surface area, moisture content, and ash content were 162.12 m2/g, 0.52%, and 5.27%, respectively. The results of the FT-IR characterization test showed an aromatic C–H, C=C and C–O. Based on the results of characterization with XRD giving a pattern at a diffraction angle of 2 20 - 30o, it was seen that there was a wide peak, which indicated that it had an amorphous structure. The optimum conditions for methylene blue adsorption occurred at a contact time of 40 minutes, and the adsorbent weight was 0.1 g for 10 mL of 50 ppm methylene blue. The adsorption of methylene blue followed the Freundlich isotherm adsorption pattern and had a maximum adsorption capacity of 8.92 mg/g.
Adsorption of Methylene Blue using Composite Fe3o4-Activated Charcoal Cassava Skin (Manihot esculenta C.) Duwi Devi Wulandari; Soerja Koesnarpadi; Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 21 No 2 (2024)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v21i2.1247

Abstract

Preparation of Fe3O4 activated cassava shell charcoal composite (Fe3O4-AAKS) by coprecipitation method, namely mixing activated cassava shell charcoal (AAKS) with FeCl3.6H2O and FeSO4.7H2O solutions using a mole ratio of 3:2 in alkaline conditions with the addition of 25% NH4OH has been carried out. The Fe3O4-AAKS composite was characterized using Fourier Transform Infra-Red (FTIR) and X-Ray Diffraction (XRD) instruments, then the composite material was applied to adsorb methylene blue with variations in the influence of contact time, optimum concentration and optimum adsorbent mass and determined the adsorption isotherm model. The results of the characterization of Fe3O4-AAKS with FTIR showed that a composite had been formed which was marked by the appearance of absorption at wave number 1033,85 cm-1 indicating the presence of a C-O group and the appearance of a typical absorption of Fe-O groups at 540,07 cm-1. Fe3O4-AAKS XRD results show an amorphous charcoal diffraction pattern at an angle of 20º-30º and a magnetic phase iron oxide diffraction pattern of Fe3O4 at 2 θ at angles of 18.59º, 30.38º, 35.62º, 43.56º, 53.85º, 57.30º, 62.90º and 74.62º. Methylene blue adsorption application using Fe3O4-AAKS composite showed optimum conditions at contact time of 30 minutes, optimum concentration at 60 mg/L with optimum adsorbent mass of 0.05 gram. The adsorption pattern of the composite material follows the Langmuir isotherm with a maximum adsorption capacity of 25.38 mg/g.
Co-Authors -, Rahayuningsih Abdul Aziz Adhaina, Karina Aditya, Adrian Maulana Ahmad, Atika Aulia Akbar, Muhammad Marion Alimuddin Alimuddin Aman Sentosa Panggabean Apriliana, Nina Arief, M. Syaiful Ashari, Irfan Audi Zahid Iswaradi Az Zahra, Upi Fathimah Bergita, Angela Br Ginting, Survina Osalia Corebima, Damianus Develistur Daniel -, Daniel Daniel Daniel Duratulhikmah, Nur Fadhilah Duwi Devi Wulandari Elean, Samuel Erwin Erwin Eva Marliana, Eva Gaanty Pragas Maniam, Gaanty Pragas Hariati, Hariati Hariati, Hariati Helbianurramdan, Helbianurramdan Hiyahara, Irfan Ashari Husna Syaima Indriani, Isah Waliah Irfan Ashari Hiyahara Isah Waliah Indriani Ishak Wiradikara Az Kusmiaty, Prilianda Laksono, Annuary Larasati, Zarra Udyani Laurentha, Nantha Mid, Arsy Aprilia Muhammad Marion Akbar N. S, R. R. Dirgarini Julia N., R.R. Dirgarini N., R.R. Dirgarini Julia Nanang Tri Widodo Octavianus, Riyan Octavianus, Riyan Oktaviani, Reka Palentin, Ersa Rizkita Pasuluran, Nirwanto Prastiwi, Mela puah, Siti Mar Putra, Narundana Perdana Putri, Rinda Anisyah Putriani, Elsa Avrilia Rahayuningsih Rahayuningsih, Rahayuningsih Rahmat Gunawan RAHMAT GUNAWAN Rakhmad, Rakhmad Ratna Kusuma Ronaldy, Igo Marsat Rudi Kartika, Rudi Saleh, Chairul Saputra, Herdian Sari, Ermalia Lintang Sari, Helbyarti Mawar Setiawan, M. Pratsojo Soerja Koesnarpadi Soerja Koesnarpadi Subagyono, Dirgarini Julia Nurlianti Subagyono, R.R. Dirgarini Julia Nurlianti Subagyono, R.R. Dirgarini Julia Nurlianti Subagyono, RR Dirgarini Julia Nurlianti Subagyono, RR Dirgarini Julia Nurlianti Sukanadi, I Putu Sumarni Sumarni Syukri, Irma Syukri, Irma Tandirerung, Edman Tanjung, Faisal Teguh Wirawan Teguh Wirawan Teguh Wirawan, Teguh Wahyuni Ramadhani Widyastuti, Tika Wilsoma, Wilsoma Winanti, Renita Anggun Winni Astuti, Winni Wulandari, Duwi Devi Wulandari, Siti Aprilia Yuli Yana