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All Journal VALENSI International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Riset Kimia Indonesian Journal of Chemistry Aceh International Journal of Science and Technology International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Kimia Unand
Upita Septiani
Departemen Kimia, FMIPA, Universitas Andalas, Padang-Sumatera Barat
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Enrichment of Sawahlunto Clay with Cation Ca2+ and Cu2+ and Preliminary Test of its Catalytic Activity in CPO Transesterification Reaction Lestari Ningsih; Aju Deska; Syukri Arief; Upita Septiani; Yulia Eka Putri; Mai Efdi; . Syukri
Aceh International Journal of Science and Technology Vol 9, No 3 (2020): December 2020
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (661.133 KB) | DOI: 10.13170/aijst.9.3.17944

Abstract

This research is aimed to examine the catalytic activity of Sawahlunto clay, which is enriched with Ca2+ and Cu2+ transesterification of Crude Palm Oil (CPO) to produce biodiesel. Based on the results of the analysis with X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD), Sawahlunto clay consists of about 61% Si and 24% Al with a Si/Al mole ratio of 2.7 and typical clay mineral consisting of kaolinite and illite, another mineral fund was quartz and goethite. The mineral composition changes after calcination, where kaolinite and illite disappeared. Fourier Transform Infrared (FTIR) analysis shows that calcination can remove the organic compounds Sawahlunto clay; thus, the clay was used without calcination for the next step. Clay samples can be enriched with Ca2+ ions and Cu2+ ions without damaging their mineral composition, where more Cu2+ ions are loaded than Ca2+ ions. The Sawahlunto clay enriched with Ca2+ ions showed a slightly better catalytic activity in the transesterification of crude palm oil (CPO) than its parent clay; when enriched with Cu2+ ions, the catalytic activity did not appear at all. However, the homogeneous counterpart of such catalyst, calcium nitrate, was still the most active and selective compared to all others
Synthesis of Hydroxyapatite-Polyethylene Glycol with In-Situ Method Using Calcium Oxide from Blood Shells (Anadara granosa) Novesar Jamarun; Nabiila Ayyu Trycahyani; Syukri Arief; Upita Septiani; Vivi Sisca
Indonesian Journal of Chemistry Vol 23, No 3 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.78538

Abstract

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is a calcium phosphate-based biomaterial that is widely used in bone implants due to its similarity in composition with the constituent elements of bone. However, HAp still has poor mechanical properties, so research was carried out to improve the mechanical properties such as reduced brittleness, less fracture resistance, and a denser structure of HAp by synthesizing composites with PEG. This study used PEG as a filler and HAp as a matrix. HAp was synthesized from blood clam shells (Anadara granosa) using the sol-gel method. HAp-PEG composite was synthesized using the in-situ method with various HAp concentrations of 40, 50, 60, 70, and 80%. FTIR characterization showed the presence of functional groups PO43− and CO23−, which indicated the presence of HAp. Analysis of the XRD pattern showed a crystal size of 24.194 nm. SEM-EDX showed the needle-shaped HAp-PEG composite HAp crystal morphology and obtained a Ca/P ratio of 1.87. Analysis of DTA results showed a weight loss of 65.72% in the composite at a temperature > 200 °C. A degradation test was also carried out to see the percentage of the HAp-PEG composite to be degraded, and the optimum degraded composite with increasing days had a concentration of 70%.
Synthesis of Graphene Oxide Enriched Natural Kaolinite Clay and Its Application For Biodiesel Production Syukri Syukri; Fadhil Ferdian; Yetria Rilda; Yulia Eka Putri; Mai Efdi; Upita Septiani
International Journal of Renewable Energy Development Vol 10, No 2 (2021): May 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.32915

Abstract

A heterogeneous catalyst is one type of catalyst which is very effective for biodiesel production; thus, in this study, a novel heterogeneous bifunctional catalyst was prepared by kaolinite clay obtained from Padang of West Sumatera and impregnated with graphene oxide and potassium hydroxide (KOH) for the simultaneous esterification and transesterification reactions of palm oil into biodiesel. For comparison, two other catalysts were also prepared. The first catalyst was the same clay which was heated at 450ºC for 4 hours, and the second catalyst was the same clay which was impregnated with potassium hydroxide (KOH) only. The three catalysts were characterized using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Fourier Transform Infra-Red (FTIR). XRF analysis showed that the clay sample’s main composition consisted of 54% silica, 35% alumina, and 7% hematite. The XRD analysis results showed that the most dominant crystal composition was quartz, kaolinite, and hematite. The analysis results using FTIR showed a change in intensity and shift in wave numbers indicating a cation exchange. The catalytic activity test was carried out with a ratio of oil and methanol 1:6, catalyst amount 5%, 60ºC reaction temperature, and 4 hours of reaction time.The results showed that the catalytic activity of clays impregnated with graphene oxide and potassium hydroxide was better with a yield of 58% compared to clays without impregnation and other clays that were only impregnated with KOH under the yields of 0.8% and 0.4%, respectively
Natural Clay of Pasaman Barat Enriched by CaO of Chicken Eggshells as Catalyst for Biodiesel Production Syukri Syukri; Kevin Septioga; Syukri Arief; Yulia Eka Putri; Mai Efdi; Upita Septiani
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.3.8097.662-673

Abstract

This study uses broiler chicken eggshells to enhance catalytic activity of clay obtained from Pasaman Barat (West Sumatra, Indonesia) in lab-scale biodiesel production. The eggshell is a source of calcium oxide (CaO) which operates as a catalyst when mixed with the clay (Ca-Clay). Two other catalysts were also prepared as comparisons by 1) heating the clay at 800 oC for 6 hours (P-Clay), 2) mixing the P-Clay with KOH (K-Clay). An X-ray Fluorescence (XRF) showed the elemental composition of Ca-Clay contained Ca, Si, Al, and Fe. An X-ray Diffraction (XRD) showed the formation of highly crystalline CaO in the Ca-Clay with the main peak at 2θ = 37.27o. The Fourier Transform Infra Red (FTIR) spectrum showed an absorption peak in the range of 700-900 cm-1 indicating Ca-O stretching demonstrating successful incorporation of the CaO into the clay. The catalytic activity test showed the Ca-Clay had a higher catalytic performance than P-Clay and K-Clay in terms of the yield of biodiesel produced (73%). Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Efek Pendoping Nd3+ Pada Senyawa BaBi2-xNdxNb2O9 Terhadap Struktur, Sifat Dielektrik Dan Optik Zulhadjri Zulhadjri; Tommy Hermansyah; Upita Septiani
Jurnal Riset Kimia Vol. 15 No. 2 (2024): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v15i2.690

Abstract

The Aurivillius compound with formula BaBi2-xNdxNb2O9 (x = 0.05, 0.1, 0.2, and 0.4) has been successfully synthesized using the molten salt method, showing potential as a ferroelectric material. The impact of Nd3+ substitution on the structure, morphology, dielectric, and optical properties has been systematically analyzed. XRD data refinement confirms that BaBi2-xNdxNb2O9 (BBNN) exhibits an orthorhombic structure with an A21am space group. Anisotropic plate-like grains were observed across all samples, decreasing their size as Nd3+ content increases. The ferroelectric transition temperature (Tc) decreases due to structural distortion caused by the reduction of the lone pair 6s2 electron effect of Bi3+ when substituted with Nd3+. Moreover, this structural distortion also contributes to an increase in bandgap energy (Eg). The diffuse ferroelectric phase transition is characterized by a broadened Tc peak induced by Nd3+ substitution due to increased cationic disruption in the bismuth layers. The ferroelectric phase with a lower and broader Tc suggests that the x = 0.4 sample has the potential for electrocaloric applications.
Influence of Calsination Temperature on Zeolite Synthesis from Non-Hazardous Wastes and Its Application as an Adsorbent of Mn Metal Ion Septiani, Upita; Syukri; Mia Yeliandri; Safni; Zilfa
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.29-35.2025

Abstract

In this research, zeolite material was synthesized by hydrothermal method using non- hazardou waste of fly ash as the raw material at low crystallization temperatures of 70oC with seawater as solvent. The effect of calsination temperature on synthesis of zeolite was studied, and the ability of synthesized zeolite to adsorb Mn metal ion in aqueous solution was also investigated. The synthesized zeolite was characterized by Fourier Transform Infra-Red (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM-EDS), and Surface Area Analyzer (SAA). Based on the results of XRD, the type of zeolites produced from the synthesized zeolite are zeolite X and sodalite. The synthesized zeolite was then tested for the adsorption of Mn metal ion, using atomic absorption spectrophotometer (AAS) and it was found that the zeolite material synthesized calcined 550oC had the highest adsorption capacity compared to other synthesized zeolite materials, where the maximum adsorption was 192,31 mg/g.
Effect of Sodium Citrate and Urea as Additive on the Synthesis of Hydroxyapatite from Blood Cockle Shells: Kinetics and Adsorption Isotherms Study of Coomassie Brilliant Blue Putri, Dhea Rahmanda; Jamarun, Novesar; Septiani, Upita; Sisca, Vivi
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102465

Abstract

Hydroxyapatite (HAp) was synthesized from blood cockle shell waste by the sol-gel method, incorporating sodium citrate and urea as additives for Coomassie brilliant blue (CBB) adsorption. The synthesis included HAp without additives (HAp 1) and with 30 g/L of urea and varying sodium citrate concentrations of 0 (HAp 2), 0.1 (HAp 3), 0.2 (HAp 4), 0.3 (HAp 5), 0.4 (HAp 6), and 0.5 (HAp 7) g/L. HAp 4 showed the highest adsorption capacity at 96.60 mg/g. FTIR analysis of HAp 4 revealed adsorption bands for O−H and PO43− groups. XRD analysis indicated a crystal size of 24.55 nm with low crystallinity. SEM-EDS analysis showed a Ca/P ratio of 1.28, with an irregular shape due to agglomeration and an average particle size of 1.16 µm. SAA analysis found a surface area of 107.18 m2/g, a pore size of 12.55 nm, and a pore volume of 0.36 cm3/g. HAp 4 followed the Langmuir and pseudo-second-order isotherm models in CBB adsorption and demonstrated five-time reusability, proving it to be an effective adsorbent for CBB dyes.
Co-Authors -, Rahmayeni . Syukri Aju Deska Amir, Firmanul Qadri Fadhil Ferdian Fatiha, Widya Yuliani Fiska Julian Tasari Gustiana, Mega Hamdi, Hayatul Hitoshi Kubota Hitoshi Kubota, Hitoshi Ida Ayu Putu Sri Widnyani Ilona Bella Kevin Septioga Lestari Ningsih Lisma, Agrina Mahmud, Marsal Mai Efdi Mai Efdi Mega Gustiana Mia Yeliandri Mirawati Mirawati Mirawati Mirawati Nabiila Ayyu Trycahyani Novesar Jamarun Putri, Dhea Rahmanda Reza Audina Putri Reza Audina Putri Riri Trinanda Safni Safni Safni Silvi Veronita Sisca, Vivi Solly Aryza Sugeng, Santoso Syukri Syukri Arief Syukri Syukri Syukri Syukri Tasari, Fiska Julian Tommy Hermansyah Veronita, Silvi Vivi Sisca Wellia, Diana Vanda Widya Yuliani Fatiha Yetria Rilda Yuli Okta Fitriyani Yulia Eka Putri Zilfa Zilfa Zulhadjri Zulhadjri