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All Journal Journal of Education and Learning (EduLearn) The Journal of Pure and Applied Chemistry Research JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Indonesian Journal of Chemistry Akta Kimia Indonesia Indonesian Community Journal Prapanca : Jurnal Abdimas
Meyga Evi Ferama Sari
Universitas Negeri Malang
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Synthesis and Characterization of Complex Compounds from Cadmium(II) Chloride and Cobalt(II) Chloride with N,N'-Diethylthiourea Reza Mega Wahyuni; Husni Wahyu Wijaya; Meyga Evi Ferama Sari; I Wayan Dasna; Nani Farida
The Journal of Pure and Applied Chemistry Research Vol 11, No 1 (2022): Edition January-April 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.01.640

Abstract

The synthesis of ionic complexes of cadmium(II) chloride and cobalt(II) chloride with N,N'-diethylthiourea (detu) ligands has not been previously reported. Therefore, in this research, the synthesis was carried out to study the structure and characterization of the two ionic complex compounds. The cadmium(II)-detu ionic complex was synthesized using the direct reaction method with a ratio between Cd(II) salt and detu ligand of 1:2. Meanwhile, the cobalt(II)-detu ionic complex was synthesized with a ratio between Co(II) salt and detu ligand of 2:4. The cadmium(II)-detu and cobalt(II)-detu ionic complexes have melting points of 105-108 ˚C and 122-125 ˚C, respectively. The electrical conductivity of the cadmium(II)-detu and cobalt(II)-detu complexes showed that the complexes were ionic. The FTIR analysis showed the shifting of the C=S functional group’s band to the smaller wavenumber, which indicates the coordinating detu ligand to the cadmium(II) and cobalt(II) through the S atom. The indirect evidence from 1H-NMR showed that CH3 and CH2 only slightly shifted between the free detu ligand and the Cd-detu and Co-detu complexes.
Adsorpsi Pb2+ menggunakan Sodalit dari Kaolin Bangka Belitung Meyga Evi Ferama Sari; Suprapto Suprapto; Didik Prasetyoko
Akta Kimia Indonesia Vol 5, No 1 (2020)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (930.544 KB) | DOI: 10.12962/j25493736.v5i1.5514

Abstract

Sodalit merupakan salah satu jenis zeolit yang secara umum memiliki komposisi Na8[Al6Si6O24](X)2, dimana X adalah anion monovalent. Sintesis sodalit dari kaolin Bangka Belitung telah dilakukan dengan menggunakan komposisi rasio molar x Na2O : 2 SiO2 : Al2O3 : 128 H2O, dimana x merupakan variasi alkalinitas dengan rasio sebesar 10, 20, 30, dan 40. Produk sodalit dihasilkan pada variasi alkalinitas 10 (S-10), 20 (S-20), dan 30 (S-30) lalu diuji aktivitas adsorpsinya terhadap Pb2+. Berdasarkan hasil uji aktivitas adsorpsi untuk ion Pb2+ diketahui bahwa sampel dengan ukuran partikel yang paling kecil memiliki kapasitas adsorpsi paling tinggi (S-10). Jumlah Pb2+ yang teradsorp untuk sample S-10, S-20, dan S-30 berturut turut sebesar 651,10; 517,30; dan 527,30 mg/g.
Direct Synthesis of Sodalite from Kaolin: The Influence of Alkalinity Meyga Evi Ferama Sari; Suprapto Suprapto; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.761 KB) | DOI: 10.22146/ijc.25191

Abstract

Alkalinity is one of the most important factors that influence the crystallization process of zeolite and the product properties. The influence of alkalinity on the synthesis of sodalite from kaolin without calcinations was reported in this research. The synthesis of sodalite using molar ratio of Na2O/Al2O3 = x, H2O/Na2O = 128/x and SiO2/Al2O3 = 2/x, where x was the variation of molar ratio of alkalinity: 10, 20, 30, and 40. The synthesis has done by stirring for 6 h, without aging, and the crystallization time was 24 h under hydrothermal method (100 °C). The products were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The X-ray diffraction pattern and infrared spectroscopy shown that pure sodalite was formed by using molar ratio of alkalinity 10, 20, and 30. The crystallinity and particle size increase along with increasing of alkalinity. Quartz was formed by using molar ratio of alkalinity 40.
Pelatihan Pembuatan Sel Volta dengan Minyak Jelantah dan Penambahan Katalis Silika Pada Pembelajaran Ilmu Pengetahuan Alam (IPA) SMP Negeri 4 Pasuruan dalam Meningkatkan Kualitas Riset Dika Putra Wijaya; Nuzulia Qur'ani; Maritza Verda Zahirah; Adilah Aliyatulmuna; Meyga Evi Ferama Sari; Danar Danar; Neena Zakia
I-Com: Indonesian Community Journal Vol 3 No 2 (2023): I-Com: Indonesian Community Journal (Juni 2023)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (852.501 KB) | DOI: 10.33379/icom.v3i2.2583

Abstract

SMPN 4 Pasuruan merupakan salah satu sekolah negeri di Kota Pasuruan, sekolah ini terletak di Kecamatan Purworejo di Kota Pasuruan. Lebih tepatnya berada di Jalan RW. Monginsidi, No. 56, Kebonagung, Kecamatan Purworejo, Kota Pasuruan, Jawa Timur, 67111. Pengabdian ini merupakan bagian dari skema Pengabdian Mahasiswa kategori bidang sains, teknologi, dan lingkungan, melalui bidang unggulan penerapan ipteks untuk pengelolaan potensi unggulan lokal Jawa Timur. Pengabdian ini dilakukan  dengan beberapa tahap, yaitu 1) Melakukan sosialisasi kepada siswa ataupun siswi SMPN 4 Pasuruan mengenai kandungan dan potensi bahan hayati lokal (minyak jelantah) untuk dibuat biodiesel secara mandiri dalam memproduksi minyak tersebut menggunakan sel elektrolisis dengan potensi pemasaran produknya, 2) Melakukan pendampingan secara langsung untuk melatih siswa atau siswi SMPN 4 Pasuruan tersebut dan penyediaan peralatan produksi minyak jelantah dan, 3) Pembuatan laporan. Luaran yang dijanjikan dari pengabdian ini adalah 1) Laporan Kemajuan dan Akhir, 2) Publikasi artikel ilmiah/media sosial. Kesimpulan dari pengabdian masyarakat ini bertujuan untuk memberikan pelatihan keterampilan dan pengetahuan kepada para peserta yang merupakan siswa/i maupun guru SMPN 4 Pasuruan tentang pemanfaatan minyak jelantah untuk membuat produk kewirausahaan. Target yang dicapai dalam program ini adalah peserta mampu mengetahui dan mengolah bahan utama berupa minyak jelantah menjadi produk kewirausahaan yang lebih bermanfaat.
Studi Sintesis, Karakterisasi, dan Sifat Magnetik Senyawa Kompleks Nikel-N,N’-Dietiltiourea klorida Husni Wahyu Wijaya; Alfida Rahmah; Meyga Evi Ferama Sari; Siti Hartinah
JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Vol 7, No 1 (2023)
Publisher : State University of Malang or Universitas Negeri Malang (UM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um0260v7i12023p016

Abstract

Senyawa kompleks dari garam nikel dengan ligan N,N’-dietiltiourea (detu) perbandingan mol 1:4 berhasil disintesis dan dikarakterisasi dengan metode reaksi langsung dan refluks. Kompleks Ni-detu(DR) dan Kompleks Ni-detu(R) yang secara berurutan disintesis dengan metode langsung dan refluks mempunyai  titik lebur  159-161°C dan 114-116°C. Analisis data FT-IR kedua sampel menunjukkan ikatan υ(N-H) Ni-detu berada pada rentang 3233-3235 cm-1, υ(C-H) 2964-2974 cm-1, υ(C-N) 1562-1579 cm-1, dan υ(C=S) 646-653 cm-1. Analisis refinement data XRD diperoleh Rwp sebesar 11,63% menunjukkan senyawa yang terbentuk mempunyai kemiripan struktur dengan senyawa kompleks [Ni(detu)4]Cl2. Hasil pengukuran VSM pada kompleks hasil sintesis Ni-detu(DR) dan Ni-detu(R) menujukkan keduanya bersifat diamagnetik.
Pelatihan Pembuatan Elektrolisis Dengan Minyak Jelantah Pada Pembelajaran SMPN 4 Pasuruan Dalam Meningkatkan Kualitas Riset: Industri Kreatif Wijaya, Dika Putra; Fitriyani, Citra Eka; Kurnia, Nur Laili Eviana Indah; Aliyatulmuna, Adilah; Zakia, Neena; Sari, Meyga Evi Ferama Sari; Danar, Danar; Putri, Nasywa Alifia Sandi; Darmawan, Fairuz Indah; Kholilah, Khusnul
Prapanca : Jurnal Abdimas Vol. 3 No. 2 (2023): Prapanca : Jurnal Abdimas
Publisher : LPPM Stikosa - AWS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37826/prapanca.v3i2.518

Abstract

SMPN 4 Pasuruan is one of the public schools in Pasuruan City, this school is located in Purworejo District in Pasuruan City. More precisely located on Jalan RW. Monginsidi, No. 56, Kebonagung, Purworejo District, Pasuruan City, East Java, 67111. This service is part of the Student Service scheme in the science, technology and environment categories, through the leading areas of science and technology implementation for the management of East Java's local superior potential. This service is carried out in several stages, namely 1) Conducting socialization to students of SMPN 4 Pasuruan regarding the content and potential of local biological materials (used cooking oil) to be made biodiesel independently in producing this oil using electrolysis cells with the potential for marketing the product, 2) Conducting direct assistance to train students at SMPN 4 Pasuruan and provide used cooking oil production equipment and, 3) Report preparation. The promised outputs from this service are 1) Progress and Final Reports, 2) Publication of scientific articles/social media. The conclusion of this community service aims to provide skills and knowledge training to participants who are students and teachers of SMPN 4 Pasuruan about using used cooking oil to make entrepreneurial products. The target achieved in this program is that participants are able to know and process the main ingredient in the form of used cooking oil into more useful entrepreneurial products.
Crystal Growth Study of CoZnPO-HEX (CZP) Synthesised using Solvent-Free Method and Its Crystal Growth Simulation Farida, Nani; Ningtyas, Anggraini Widya; Pertiwi, Elva Oktavianti; Wijaya, Husni Wahyu; Danar, Danar; Sari, Meyga Evi Ferama
Akta Kimia Indonesia Vol 9, No 1 (2024)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25493736.v9i1.20989

Abstract

Zinco-phosphate having CZP structure (CoZnPO-HEX) has a potential as a catalyst in Knoevenagel condensation of benzaldehyde with activated methylenic compounds or the Michael addition of nitroethane to olefin. The potency is led by the physicochemical properties of the material, which depend on its crystal habits. Understanding the crystal growth of materials is important to be able to design and control their crystal habits.  Therefore, the crystal growth study of CoZnPO-HEX is crucial for its crystal habit modification as well as for optimization and expansion of the material’s functions. Several parameters of crystal growth, such as nucleation time, gel supersaturation, and crystal size changes during the synthesis process can be analysed by observing the material’s crystallisation profile. In this study, crystallisation analysis was performed on CoZnPO-HEX, synthesised using solvent-free method, from its crystallinity curve based on Powder-XRD data supported by SEM data. As a comparison, crystal growth simulation was performed using CrystalGrower program to determine the morphology, surface topography, and theoretical crystal growth mechanisms. From this study, we found that the nucleation time of the CoZnPO-HEX crystals prepared using a solvent-free method took place during the precursor grinding process at room temperature. The crystal morphology of the as-prepared materials agrees well with the simulation’s one. Moreover, the CrystalGrower simulation proved that the smallest t-czp-1 tile started the nucleation on the crystal surface because of its low free energy.
Analysis of content development in chemical materials related to ethnoscience: a review Widarti, Hayuni Retno; Wiyarsi, Antuni; Yamtinah, Sri; Siddiq, Ari Syahidul; Sari, Meyga Evi Ferama; Fauziah, Putri Nanda; Rokhim, Deni Ainur
Journal of Education and Learning (EduLearn) Vol 19, No 1: February 2025
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/edulearn.v19i1.21210

Abstract

One way to preserve culture in education is through ethnoscience-based learning, especially in chemical materials linked to various fields of science in life, including social and cultural. Ethnoscience is a process of reconstructing indigenous science knowledge with scientific science. This research aims to explore trends in ethnoscience-based chemistry learning in Indonesia and analyze the contents, focusing on topics, learning approaches and models, tools, and variables influenced. The research data collection method adopted the preferred items for systematic review and meta-analysis (PRISMA) design and obtained from 30 selected articles indicated from 2019-2024 published in journals indexed by Scopus and SINTA. Analysis results show that the process of making batik is one of the ethnoscience topics that are widely used in chemistry learning. Ethnoscience learning can also be done by combining local wisdom (culture), traditional foods, and natural phenomena of the environment. Ethnoscience learning can be integrated into various learning models, such as contextual teaching and learning (CTL), problem-based, and project-based learning (PjBL). Learning tools often used in ethnoscience-based chemistry learning are modules, evaluation instruments, and worksheets. Ethnoscience is interesting to learn because it positively affects critical thinking and creativity, cultural and conservation character, and scientific literacy.
Co-Authors Adilah Aliyatulmuna Alfida Rahmah Antuni Wiyarsi Danar Danar Danar, Danar Darmawan, Fairuz Indah Deni Ainur Rokhim Didik Prasetyoko Dika Putra Wijaya Fauziah, Putri Nanda Fitriyani, Citra Eka Hayuni Retno Widarti Husni Wahyu Wijaya I Wayan Dasna Kholilah, Khusnul Kurnia, Nur Laili Eviana Indah Maritza Verda Zahirah Nani Farida Neena Zakia Ningtyas, Anggraini Widya Nuzulia Qur'ani Pertiwi, Elva Oktavianti Putri, Nasywa Alifia Sandi Reza Mega Wahyuni Siddiq, Ari Syahidul Siti Hartinah Sri Yamtinah Suprapto Suprapto Suprapto Suprapto Wijaya, Dika Putra