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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Materi Indonesia Jurnal Teknosains Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Majalah Ilmiah MOMENTUM Walisongo Journal of Chemistry Neo Teknika: Jurnal Ilmiah Teknologi Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Pengabdian kepada Masyarakat Nusantara Merdeka Indonesia Jurnal International Majalah Ilmiah Inspiratif Jurnal Pengabdian Masyarakat Bhinneka Journal of Social Work and Empowerment

Ricka Prasdiantika

Jurusan Analisis Farmasi Dan Makanan, Politeknik Kesehatan Kementerian Kesehatan Surakarta

Author-ID : 6851843

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Identifikasi Oksida Besi dan Pengaruh Pencucian Material Magnetik Pasir Besi Pantai Jomblom Menggunakan Metode Sonokimia Prasdiantika, Ricka; Agustin, Niyar Candra; Rohman, Abdul
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 16, No 3 (2019): November 2019
Publisher : Universitas Diponegoro

This study aims to prepare iron sand, determine the type of iron oxide, and determine the effect of washing iron sand with sonochemical methods. Iron sand samples were obtained from Jomblom Beach, Kendal Regency. Iron sand was separated using an external magnet to obtain magnetic material. The magnetic material obtained was washed using distilled water manually stirred and using the sonochemical method. The material was dried at 80 Â°C. Material characterization was carried out using X-Ray Fluorescence (XRF) to determine the elements contained in iron sand, Fourier Transform Infrared (FT-IR) Spectrophotometer to identify functional groups in iron sand, X-Ray Diffraction (XRD) to find out the crystal size and crystallinity of iron sand, and the Transmission Electron microscope (TEM) to determine the morphology of iron sand. The characterization results showed that the iron sand of Jomblom Beach contained Fe (72.28%), Ti (7.89%), Al (7.00%), and Si (7.60%). The iron oxide contained in the Jomblom Beach iron sand was dominated by magnetite (Fe3O4). Washing iron sand magnetic material using the sonochemical method increased the composition of the element Fe, increased the crystallinity of the magnetic material, prevented aggregation, and reduced the crystal size of the magnetic material. Magnetic material which was washed using the sonochemical method produced 79.47% Fe element, crystallinity 74.94%, and crystal size 52.78 nm.

Sintesis Natrium Zirkonia Sebagai Katalis Reaksi Transesterifikasi Minyak Goreng Bekas Agustin, Niyar Candra; Prasdiantika, Ricka
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 1 (2020): Maret 2020
Publisher : Universitas Diponegoro

Catalyst is one of factor that affect the results of the transesterification reaction. Catalyst has spesific properties that can only be used in certain reaction. In order to carry out the transesterification reaction a suitable catalyst is needed and has optimal performance. This research aims to synthesize sodium zirconia (Na2O/ZrO2) as a catalyst for transesterification reaction of used cooking oil into biodiesel and the effect of the concentration of NaOH solution on the zirconia catalyst (ZrO2). The sodium zirconia catalyst(Na2O/ZrO2) was synthesized by wet impregnation method by mixing ZrO2 and NaOH solution with variations in concentrations of 2, 4 and 6 M. Transesterification reaction is carried out with catalyst amount of 5%(w/w), with areaction time of 20 minutes, and by microwave heating at 400 watt microwave power. The comparison of oil molar with methanol was 1:15. Na2O/ZrO2 catalysts was characterized by Fourier Transform Infrared(FT-IR) Spectrophotometer, and X-Ray Diffractometer (XRD) and Scanning Electron Microscopy/Energy Dispersive X-ray (SEM/EDX). The resulting biodiesel was characterized by Gas Chromatography-Mass Spectrometry (GC-MS). Using Na2O/ZrO2 2 M catalysts produced the most biodiesel which was 85.5% (w/w). The formed biodiesel contained methyl palmitate (25,11%), methyl linoleate (10,87%), methyl elaidate (57,88%), and methyl stearate (6,14%). The characterization results showed that Na2O/ZrO2 as the transesterification used cooking oil catalyst was successfully synthesized.

PENGARUH PELARUT TERHADAP DISPERSI PARTIKEL Fe 3O4@SITRAT. Susanto Susanto; Ricka Prasdiantika; Theodor C.M. Bolle
Jurnal Sains Materi Indonesia Vol 17, No 4: JULI 2016
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

PENGARUH PELARUT TERHADAP DISPERSI PARTIKEL Fe 3O4@SITRAT. Magnetit (Fe3O4) memiliki sifat yang khas dan memiliki banyak aplikasi dalam berbagai bidang. Dispersi partikel berperan penting dalam menentukan sifat magnetit. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis pelarut (aseton-air dan aseton-etanol) terhadap dispersi partikel Fe3O4@sitrat.Sintesis Fe3O4 dilakukan menggunakan natrium sitrat sebagai agent pendispersi magnetit melalui pengadukan dengan gelombang ultrasonik pada sistem co-presipitasi, kemudian dilakukan pencucian dengan variasi pelarut. Produk hasil sintesis dikarakterisasi dengan Fourier Transform Infrared Spectrophotometer (FT-IR), X-Ray Diffraction (XRD), dan Transmission Electron Microscope (TEM). Hasil menunjukkan bahwa Fe3O4 yang terdispersi oleh natrium sitrat dengan pencucian aseton-air menghasilkan dispersi partikel yang lebih baik dan memiliki agregat yang lebih kecil dibandingkan pencucian aseton-etanol.

THE DEVELOPMENT OF SCIENCE PROCESS SKILLSBASED ASSESSMENT ON MATERIAL FACTORS INFLUENCE THE RATE OFREACTION ricka prasdiantika; nina kadaritna; noor fadiawati
Jurnal Pendidikan dan Pembelajaran Kimia Vol 1, No 2 (2012): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (78.687 KB)

This study aims to develop scienceprocess skills (SPS) based assessmenton material influence ofthe rate of reaction.The research methodused is theResearchand Development (RD).The results of this assessment, the development of the 15 multiple choice questions on the grounds, and 8 essay questions that measure indicators of cognitive products, and indicator SPS students who presented using macroscopic representation, submicroscopic representation, and symbolic.Results from the limited testing it is known that SPSbased assessmentis in accordancewith thecurriculum of the SK-KD is the percentage of 95.20%, is in accordance with the indicator SPS is the percentage 98.18%, has a very highlevel oflegibilityto the percentage of 86.56%, and has a very highlevel of interesting with thepercentage of88.33%. Based on theresponsesof teachers, SPS based assessmentis feasible for students tested.Keywords: assessment, reaction rate, scienceprocess skills

SINTESIS NANOMATERIAL MAGNETIT-SITRAT DAN PENGUJIAN APLIKASINYA SEBAGAI ADSORBEN EMAS (III) Susanto Susanto; Ricka Prasdiantika; Theodor C.M. Bolle
Jurnal Teknosains Vol 6, No 2 (2017): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.10821

This study aims to synthesize of magnetite nanomaterial was dispersed with trisodium citrate (Fe3O4@citrate), carry out the characterization, and testing of its application in adsorbing of Au(III). Research carried out by synthesis of Fe3O4 with stirring using ultrasonic waves to synthesis of magnetite in the system of co-precipitation, using sodium citrate as dispersing agent of magnetite, and using acetone-water as solvent at washing of magnetite. Synthesized product was characterized by Fourier Transform Infrared spectrophotometer (FTIR), X-ray diffractometer (XRD), and transmission electron microscope (TEM). The characterized results indicate that Fe3O4@citrate has successfully synthesized with particle size of 17 nm. Fe3O4@citrate has smaller particle size, has smaller aggregates and has better particle dispersion than Fe3O4 without citrate. Testing the potential of synthesized Fe3O4@citrate as adsorbent of Au(III) from HAuCl4 solution of 200 ppm at pH 3. The Synthesized Fe3O4@citrate adsorbed the gold(III) of (81.554 ± 1.403) mg/g.

PREPARASI DAN PENENTUAN JENIS OKSIDA BESI PADA MATERIAL MAGNETIK PASIR BESI LANSILOWO Ricka Prasdiantika; Susanto Susanto
Jurnal Teknosains Vol 6, No 1 (2016): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.11385

This study aims to preparation, identify the content, and determine the type of iron oxide on the magnetic material from Iron Sand Lansilowo. Magnetic material is separated from iron sand using an external magnet. Magnetic material washes by using aquadest and dried at 80 °C. Materials were characterized by X-Ray fluorescence (XRF), Fourier Transform Infrared (FT-IR) spectrophotometer, X-ray diffractometer (XRD) and Transmission electron microscope (TEM). The results show that the magnetic material of iron sand Lansilowo contains elements of Fe (46.13%), the element Cr (28.08%), Mg (10,11%), Si (8.20%) and other minor elements. Iron oxide contained in iron sand Lansilowo is dominated by magnetite iron oxide (Fe3O4). The results of characterization show that the magnetic material of iron sand still contain oxide impurities such as silica oxide and chromium oxide

PENGARUH RUTE SINTESIS TERHADAP KEEFEKTIFAN PENGIKATAN GUGUS PDETA PADA SINTESIS Fe3O4@SiO2@PDETA Susanto Susanto; Ricka Prasdiantika
Jurnal Teknosains Vol 8, No 1 (2018): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.36264

Synthesis of Fe3O4@SiO2 modified with propyldiethylenetriamine (Fe3O4@SiO2@PDETA) with variation of synthesis routes have been investigated. Research was begun with synthesis of Fe3O4 using dispersion agent of trisodium citrate at coprecipitation system through stirring using ultrasonic wave. Coating magnetite with propyldiethylenetriamine modified silica was carried out through sol-gel process with two different mixing sequences of raw materials (two synthesis routes) with main materials of Fe3O4 synthesized, N-[3-(Trimethoxysilyl)propyl]-diethylenetriamine (TMSPDETA) and Na2SiO3. The products were characterized by fourier transform infrared (FTIR) spectrophotometer and scanning electron microscope-energy dispersive X-ray (SEM-EDX). Results indicate that Fe3O4@SiO2@PDETA has been synthesized succesfully. Fe3O4@SiO2@PDETA synthesized through route 1 (magnetite mixed with a mixture TMSPDETA and Na2SiO3) contains more propyldiethylenetriamine group than that of through route 2 (magnetite mixed with Na2SiO3 solution, then mixed with TMSPDETA)

Pencucian material magnetik pasir besi lansilowo menggunakan larutan asam klorida Ricka Prasdiantika; Susanto Susanto
Jurnal Teknosains Vol 10, No 1 (2020): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.43985

Iron sand was widely used in various fields such as in the manufacturing of magnets, cement, and steel. Iron sand has the main composition of iron oxide and several impurities of oxides. To remove these impurities, iron sand needs to be washed with acidic solution such as HCl solution. This study aims to minimize impurities in the magnetic material of Lansilowo iron sand. Iron sand was prepared using an external magnet to obtain magnetic material. The magnetic material was washed using distilled water and 0.5 M HCl solution. The drying process was carried out at 80oC for 24 hours. Magnetic material was crushed, weighed, and characterized. Material characterization was carried out using X-Ray Fluorescence (XRF), Fourier Transform Infrared (FT-IR) Spectrophotometer, and X-Ray Diffractometer (XRD). The Characterization results showed that washing of magnetic material using H2O-HCl 0.5 M was able to increase the percentage of Fe element composition in Lansilowo iron sand. The iron oxide contained in Lansilowo Iron Sand remains magnetite. The washing the iron sand magnetic material using 0.5 M HCl solution succeeded in removing impurities such as Mg, Pr, K, Cl, P, S, Co, Ce, and Sn as well as reducing the percentage of the Si and Al elements.The washing magnetic material using 0.5 M H2O-HCl produced higher XRD intensities than those washed with H2O. The washing magnetic material with 0.5 M H2O-HCl was result particle size of 37,70 ± 4,62 nm and crystallinity of 53.12%.

Sintesis Biodiesel Minyak Ampas Tahu Terkatalisis Lempung Termodifikasi Kalsium Oksida dengan Pemanasan Microwave Niyar Candra Agustin; Ricka Prasdiantika; Sri Subekti
METANA Vol 18, No 1 (2022): Juni 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v18i1.42417

Biodiesel telah menjadi sumber energi alternaltif yang terus dikembangkan. Pada penelitian ini telah dilakukan sintesis biodiesel dari minyak ampas tahu menggunakan katalis lempung termodifikasi Kalsium Oksida (CaO) dengan pemanasan microwave untuk menghasilkan biodiesel. Sintesis Katalis lempung termodifikasi CaO menggunakan metode impregnasi basah. Sistesis biodiesel dari minyak ampas tahu melalui reaksi transesterifikasi dengan variasi jumlah katalis lempung termodifikasi CaO 1, 2, 3, 4, 5 % (b/b) dan variasi daya microwave 150, 300, 450, 600, dan 800 watt. Katalis Lempung termodifikasi CaO dikarakterisasi SEM EDX (Scanning Electron Microscopes/Energy Dispersive X-Ray) dan uji kebasaannya dengan metode Hammet. Produk biodiesel dikarakterisasi dengan Gas Chromatography-Mass Spectroscopy (GC-MS). Hasil karakterisasi menunjukkan bahwa biodiesel minyak ampas tahu telah berhasil disintesis. Biodiesel optimum dicapai pada jumlah katalis lempung termodifikasi CaO sebesar 3% dan daya microwave 600 watt dengan waktu reaksi 15 menit sebesar 90%. Terbentuknya biodiesel dibuktikan dengan beberapa puncak metil ester yaitu metil oleat (59,88%), metil palmitat (36,74%), metil stearat (2,94%), dan metil miristat (0,28%). Biodiesel has become an alternative energy source that continues to be developed. In this study, biodiesel was synthesized from tofu dregs oil using a clay modified calcium oxide (CaO) catalyst with microwave heating to produce biodiesel. Synthesis of clay modified CaO catalyst using wet impregnation method. Synthesis of biodiesel from tofu dregs oil through transesterification reaction with variations in the amount of modified clay catalyst CaO 1, 2, 3, 4, 5 % (w/w) and variations in microwave power 150, 300, 450, 600, and 800 watts. The CaO-modified clay catalyst was characterized by SEM EDX (Scanning Electron Microscopes/Energy Dispersive X-Ray) and tested for basicity using the Hammet method. The biodiesel products were characterized by Gas Chromatography-Mass Spectroscopy (GC-MS). The characterization results show that the tofu dregs oil biodiesel has been successfully synthesized. Optimum biodiesel was achieved at 3% CaO-modified clay catalyst and 600 watt microwave power with a reaction time of 15 minutes by 90%. The formation of biodiesel was evidenced by several peaks of methyl esters, namely methyl oleate (59.88%), methyl palmitate (36.74%), methyl stearate (2.94%), and methyl myristate (0.28%).

The Synthesis of Triamine Group Modified Silica Hybrid Material Coated on Muara Kencan Iron Sand for Hg (II) Adsorption Ricka Prasdiantika; Dony Allan Pratama; Agustien Zulaidah; Eny Apriyanti; Suharman Suharman
Walisongo Journal of Chemistry Vol 5, No 1 (2022): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v5i1.9013

Hg metal was toxic and harmful to the environment because it does not biodegradation, can accumulate in living things, and pollute waters. One method that can be used was adsorption by inorganic-organic hybrid materials. This study aims to synthesize a triamine group modified silica hybrid material coated on iron sand or Magnetic Materials@Silica@Triamine (MM@SiO2@TA) to adsorb Hg(II) metal ions. The study began with the preparation of the iron sand of Muara Kencan Beach using magnets, washing using a solution of 1 M HCl and 0.5 M HF, and coating the material using sodium silica (SiO 25.5-28.5%) modified by a 99% triamine group with co-precipitation. The XRF characterization results showed that the magnetic material of the iron sand of Muara Kencan Beach has an iron oxide (magnetite) content of 73.31%. The iron oxide content increased after washing with HCl solution to 79.12% and HF solution to 81.81%. The results of FTIR, XRD, and TEM characterization showed that the MM@SiO2@TA was successfully synthesized with a size of 63.43 nm. The MM@SiO2@TA was tested to adsorb metal ion Hg(II) at a concentration of 100 ppm, pH 6, and a contact time of 1 hour. The AAS results showed that MM@SiO2@TA could adsorb metal ions Hg(II) as much as 60.82 ppm or 60.82%.

Co-Authors Abdul Rohman Agustien Zulaidah Agustien Zulaidah Agustin, Niyar Candra Apriyanti, Eny Dony Allan Pratama Eri Kurniawan Fariz Nizar January Jefry P Nina Kadaritna Niyar Candra Agustin Noor Fadiawati Praptanti Sinung Adi Nugroho Puji Basuki Purwaningrum, Shintawati Dyah Subekti, Sri Suharman Suharman Sukaryo Sukaryo Susanto Susanto Susanto Susanto Susanto Susanto Theodor C.M. Bolle Theodor C.M. Bolle Widayat Amariansah Yustika Kusumawardani Yustika Kusumawardani

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