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Molluca Journal of Chemistry Education (MJoCE)
Published by Universitas Pattimura
ISSN : 27228266     EISSN : 27228258     DOI : https://doi.org/10.30598/MJoCEvol10iss1pp1-7
Core Subject : Science, Education,
Chemistry Education
Molluca Journal of Chemistry Education (MJoCE) merupakan jurnal ilmiah berkala dengan ciri khas/identitas Kimia dari Maluku, seperti: minyak atsiri, produk dan pangan laut, pendidikan kimia yang berkarakter kelautan dan kepulauan, dll. Jurnal ini berisi tulisan ilmiah tentang bidang kimia yang meliputi hasil penelitian kimia, kimia teori, pendidikan kimia dan kimia terapan
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 163 Documents
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ANALISIS KANDUNGAN LOGAM BERAT MERKURI (Hg) PADA SEDIMEN DI PERAIRAN DESA BATUBOY TELUK KAYELI PULAU BURU Mariwy, Abraham; Septory, A N; Untailawan, R
Molluca Journal of Chemistry Education (MJoCE) Vol 13 No 1 (2023): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss1pp23-31

Abstract

Salah satu penyebab pencemaran lingkungan oleh merkuri adalah pembuangan tailing pengolahan emas yang diolah secara amalgamasi. Perairan Desa Batuboy Teluk Kayeli merupakan salah satu perairan yang diduga telah mengalami pencemaran logam berat. Tujuan penelitian ini adalah untuk mengetahui kandungan merkuri dan ukuran partikel dari sedimen di Desa Batuboy, Pulau Buru. Manfaat dari penelitian ini adalah untuk memberi bukti dan informasi ilmiah bagi masyarakat desa Batuboy tentang kandungan merkuri dalam sedimen. Ukuran butir sedimen diukur dengan menggunakan Sieve Shaker dan sampel dianalisis dengan menggunakan Mercury Analyzer. Hasil penelitian menunjukan bahwa ukuran butir partikel sedimen adalah gravel berkisar antara 2.29-5.90%, pasir 95.48-97.25%, dan lumpur 0.82-7.23%. Kadar merkuri (Hg) pada sedimen di semua sampel menunjukkan bahwa kandungan merkuri (Hg) pada sedimen di Desa Batuboy belum melewati ambang batas yang ditetapkan oleh US EPA sebesar 0,2 mg/kg.
UTILIZATION OF THE LABORATORY AND APPLICATION OF SCIENCE PROCESS SKILLS TO INCREASE STUDENT LEARNING OUTCOMES ON THE CONCEPTS OF ELECTROLYTE AND NON-ELECTROLYTE SOLUTIONS CLASS X SMA Palisoa, Napsin; Lumaela, Miftha Khuljannah
Molluca Journal of Chemistry Education (MJoCE) Vol 13 No 1 (2023): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss1pp32-39

Abstract

The purpose of this study was to determine the application of science process skills to improving student learning outcomes on the concept of electrolyte and nonelectrolyte solutions for class X SMA Negeri 26 Central Maluku and to determine student responses to learning by using the laboratory. The type of research used is descriptive quantitative research design with one group pretest-posttest design. The research sample was 25 students of class X MIA-1 SMA Negeri 26 Maluku Tengah. Data was collected using test instruments and non-test instruments. The results showed that all students (100%) had reached the KKM. To find out the increase in student learning outcomes, it is calculated using the normalized gain formula (n-gain) where 8 students (32%) are in high qualification and 17 students (68%) are in medium qualification, with an average value of n-gain of 0.7 with a percentage of 70%. For student responses to learning by utilizing laboratories in the form of practicum activities, 17 students (68%) were in the strongly agree qualification, 8 students (32%) were in the agree qualification. Thus the application of science process skills and the use of laboratories has a positive effect on improving learning outcomes.
CAN THE ETHNOSCIENCE-BASED INQUIRY LEARNING MODEL IMPROVE STUDENTS’ SCIENCE PROCESS SKILLS? Saija, Maryone; Tahya, Dominggus
Molluca Journal of Chemistry Education (MJoCE) Vol 13 No 1 (2023): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss1pp40-46

Abstract

This study aims to determine the increase in students' science process skills by applying an ethnoscience-based inquiry learning model to colloid system material from a public high school in West Seram. The type of research used is descriptive-quantitative. The sample used in this research was 30 students in class XI IPA. Data collection techniques in this study were test techniques in the form of a pre-test and a post-test. The results showed that the application of the ethnoscience-based inquiry learning model succeeded in improving students' science process skills, with an increased score calculated based on the results: the average value before learning was 26.29 and increased after learning with an average value of 80.50. The average value of N-gain is 0.74, indicating an increase in students' science process skills in the high category. Encouraging chemistry teachers to explore other ethnosciences to teach colloid systems is necessary.
PRODUCTION OF ACTIVATED CARBON OF PALMYRA PALM FRUIT SHELL (Borassus flabellifer Linn.) FROM KISAR ISLAND, SOUTHWEST MALUKU REGENCY FOR ADSORPTION OF METHYL RED DYE Maromon, Ingrid Natasya Tritama; Utubira, Yeslia; Untailawan, Romelos
Molluca Journal of Chemistry Education (MJoCE) Vol 13 No 1 (2023): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss1pp56-63

Abstract

Palmyra palm is a species of palmae that grows a lot on Kisar Island where all parts of the plant can be utilized. However, the palmyra palm fruit shell has not been used and that is only thrown away. In this study, palmyra palm fruit shell were made as activated carbon and were characterized using XRD to determine the crystallinity properties of the palmyra palm fruit shell activated carbon and adsorption test was carried out to determine the capacity and efficiency of activated carbon adsorption to methyl red dye. The production of palmyra palm fruit shell activated carbon is carried out through the carbonization stage at 300°C for 1 hour, and followed by chemical activation using H3PO4 10% solution for 24 hours. The results of the analysis using XRD showed that the activated carbon of the palmyra palm fruit shell formed peaks with the highest intensity at diffraction angles of 2θ = 26.5241° and 27.6274° with d-spacing values ​​(Å) = 3.36059 and 3.22884, which are characteristic peaks of carbon and are amorphous. The adsorption of methyl red 20 ppm use batch method, with various contact times of 5, 10, 15, 20, 25, and 30 minutes. The results of showed that on 15 minutes was the optimal time, with 0.25 gram mass of the adsorbent and the adsorption capacity and adsorption efficiency was 0.87 mg/g and 44.3%, respectively.
KAJIAN KINERJA SPEKTROFOTOMETRI UV-VIS PADA ANALISIS SPESI IODIUM DALAM GARAM KONSUMSI Marthen, Kelvin Beny; Untailawan, Romelos; Mariwy, Abraham
Molluca Journal of Chemistry Education (MJoCE) Vol 13 No 2 (2023): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss2pp64-73

Abstract

ABSTRAK Telah dilakukan kajian kinerja spektrofotometri UV-Vis pada analisis spesi iodium dalam garam konsumsi. Tujuan dari penelitian ini adalah untuk mengetahui konsentrasi iodium dalam garam konsumsi secara spektrofotometri UV-Vis pada panjang gelombang 500 nm, serta menguji kinerja spektrofotometri UV-Vis untuk parameter linearitas, presisi, akurasi, dan batas deteksi. Hasil analisis menunjukkan bahwa konsentrasi iodium dalam garam beriodium adalah 31,8 ppm. Uji kinerja spektrofotometri UV-Vis untuk parameter linearitas adalah (R2) 0,9949. Presisi untuk larutan standar 2 ppm dengan nilai KV 1,86% dan untuk larutan standar 10 ppm adalah 0,51%. Akurasi untuk larutan standar 2 ppm dengan % recovery sebesar 112,62% dan untuk larutan standar 10 ppm sebesar 117,54%. Sedangkan batas deteksi (LOD) dengan konsentrasi terendah yang masih dapat dideteksi adalah 0,0013 ppm. Hasil ini membuktikan bahwa spektrofotometri UV-Vis yang digunakan dalam penelitian memiliki kinerja yang baik sehingga layak digunakan untuk analisis spesi iodium dalam garam. ABSTRACT A UV-Vis spectrophotometric performance study has been carried out on the analysis of iodine species in iodized salt. This study aims to determine the concentration of iodine in iodized salt by UV-Vis spectrophotometry at a wavelength of 500 nm, as well as test the UV-Vis spectrophotometric performance for parameters of linearity, precision, accuracy, and limit of detection. The results of the analysis showed that the concentration of iodine in iodized salt was 31.8 ppm. The UV-Vis spectrophotometric performance test for the linearity parameter was (R2) 0.9949. The precision for a standard solution of 2 ppm with a KV value of 1.86% and for a standard solution of 10 ppm is 0.51%. Accuracy for 2 ppm standard solution with % recovery is 112.62% and for 10 ppm standard solution is 117.54%. While the limit of detection (LOD) with the lowest concentration that can still be detected is 0.0013 ppm. These results prove that the UV-Vis spectrophotometry used in this study has good performance so that it is suitable for analysis of iodine species in salt.
SKRINING FITOKIMIA DAN UJI KROMATOGRAFI LAPIS TIPIS EKSTRAK MEDIA DAN JAMUR ENDOFIT RANTING MANGGA PODANG (Mangifera indica L.) Lukis, Prima Agusti; Rosalina, Reny; Ningrum, Rizka Surya
Molluca Journal of Chemistry Education (MJoCE) Vol 14 No 1 (2024): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol13iss2pp74-82

Abstract

Salah satu varietas mangga yang merupakan tumbuhan endemik di Kabupaten Kediri, Jawa Timur adalah mangga podang. Mangga podang memiliki potensi menghasilkan berbagai macam senyawa metabolit sekunder dengan berbagai macam aktivitas biologis. Namun, kendala yang dihadapi pada proses isolasi senyawa bioaktif adalah banyaknya bahan dari bagian tumbuhan yang diperlukan untuk proses isolasi. Sehingga, perlu pemanfaatan mikroorganisme yang hidup dalam tumbuhan untuk dijadikan metode isolasi. Metode yang digunakan adalah skrining fitokimia kualitatif, serta dilakukan uji kromatografi lapis tipis (KLT) pada ekstrak media dan jamur endofit dari ranting mangga podang. Hasilnya pada ekstrak jamur J2 dan J3 mengandung alkaloid, sedangkan terpenoid dan flavonoid ditemukan pada ekstrak media J2 dan J3. Hasil uji KLT menunjukkan banyak senyawa yang terkandung dalam ekstrak media menggunakan berbagai eluen sedangkan pada ekstrak jamur tidak terdapat senyawa meskipun dilihat dengan lampu UV maupun penambahan CeSO4. Kata kunci : Fitokimia; Kromatografi Lapis Tipis; Jamur Endofit; Mangga Podang ABSTRACT One of the mango varieties which is endemic to Kediri, East Java is the Podang Mango. Podang Mango has the potential to produce various secondary metabolite compounds with various biological activities. However, the obstacle faced in the process of isolating bioactive compounds is the large amount of material from plant parts required for the isolation process. So, it is necessary to use microorganisms that live in plants as an isolation method. The method used was qualitative phytochemical screening and thin layer chromatography (TLC) tests were carried out on media extracts and endophytic fungi from podang mango twigs. The results showed that the J2 and J3 mushroom extracts contained alkaloids, while terpenoids and flavonoids were found in the J2 and J3 media extract. The TLC test results showed that there were many compounds contained in the media extract using various eluents, whereas there were no compounds in the mushroom extract even though seen with a UV lamp or the addition of CeSO4. Kata kunci : Phytochemical; Thin Layer Chromatography; Endophytic fungi; Podang Mango
PEMBUATAN ARANG AKTIF DARI TEMPURUNG BUAH LONTAR (Borassus flabellifer L.) SEBAGAI ADSORBEN RHODAMIN B Batu, Matius Stefanus; Mading, Ridwan; Kolo, Maria Magdalena
Molluca Journal of Chemistry Education (MJoCE) Vol 14 No 1 (2024): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol14iss1pp10-21

Abstract

Telah dilakukan penelitian mengenai arang aktif dari tempurung buah lontar (Borassus flabellifer L.) sebagai absorben terhadap pewarna sintetik rhodamin B. Tujuan dari penelitian ini untuk menentukan kadar air, kadar abu serta menentukan karakteristik arang aktif dari limbah tempurung buah lontar teraktivasi HCl dan menentukan kondisi optimum pada adsorbsi Rhodamin B dengan menggunakan arang aktif. Pembuatan arang aktif dari tempurung buah lontar dengan metode karbonasi dan aktivasi. HCL 1 M digunakan sebagai aktivator dengan waktu perendaman 24 jam. Proses absorbsi dilakukan dengan variasi massa absorben dan waktu kontak. Hasil yang diperoleh pada penelitian ini menunjukan bahwa karbon aktif dari tempurung buah lontar memiliki kadar air sebesar 2,18%, kadar abu sebesar 9,173% dan massa absorben optimum diperoleh pada massa absorben 1 gr dengan kapasitas adsorbat sesudah adsorbsi sebesar 0,387 ppm dan efisiensi adsorpsi sebesar 99,94 %. Sedangkan waktu kontak optimum terhadap Rhodamin B diperoleh pada waktu kontak 30 menit dengan dengan efisiensi adsorpsi sebesar 99,84 %.
Optimization of Bioethanol Production from Palmyrah Sap through a Fermentation Process Letelay, Leonard Kristofel ; Malle, Dominggus; SPd.,M.Si, Nazudin
Molluca Journal of Chemistry Education (MJoCE) Vol 14 No 1 (2024): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol14iss1pp22-27

Abstract

This study was aims to optimize bioethanol production from Borassus palmyrah and to determine content of yield optimization bioethanol fermentation. Fermentation process conducted by Borassus palmyrah optimize found ammonium sulfate addition in fermentation bottled depth as nitrogen resources. Fermentation process done by 10 g of yeast, 15 g of yeast, and 20g of yeast. This bioethanol will be used as a renewable energy source that uses Borassus palmyrah as a raw material. Qualitative test was conducted by a graph method and HPLC method. The result of the research showed that ethanol content with the addition of ammonium sulfate based on the graphic method was 77% - 85%, and the results test using HPLC was obtained an ethanol content of 98.41% - 99.72%. Thus, it can be concluded that the optimal bioethanol production process is more efficient by adding ammonium sulfate and yeast as a biocatalyst. Keywords: bioethanol, Borassus. Sp, distillation, fermentation.
ADSORPSI ASAM LEMAK BEBAS MINYAK JELANTAH MENGGUNAKAN SILIKA GEL DARI ABU LAYANG KELAPA SAWIT Sunarti, sunarti; Reubun, Mayang; Nazudin, Nazudin
Molluca Journal of Chemistry Education (MJoCE) Vol 14 No 1 (2024): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol14iss1pp28-37

Abstract

Penelitian ini bertujuan untuk mengetahui karakteristik silika gel hasil sintesis dari abu layang kelapa sawit dan kemampuannya dalam mengadsorpsi asam lemak bebas pada minyak jelantah.Sintesis silika gel menggunakan metode sol gel, dan proses adsorpsi dilakukan secara batch. Penentuan konsenrasi asam lemak dilakuka dengan metode titrasi. Hasil analisis XRD dari silika gel hasil sintesis menunjukkan puncak melebar pada 2θ= 15-30o dimana puncak tertinggi adalah pada 2θ=22,40o yang mengindikasikan silika gel hasil sintesis merupakan material yang bersifat amorf. Hasil analsis silika gel menggunakan FTIR memberikan serapan Vibrasi rentang gugus OH dari gugus silanol (Si-OH) muncul pada bilangan gelombang 3495,51cm-1. Serapan pada bilangan gelombang 1625,99 cm-1 merupakan vibrasi tekuk dari gugus Si-OH. Pada bilangan gelombang 1083 cm-1 menunjukkan vibrasi ulur asimetri Si-O dari Si-O-Si (gugus siloksan) dan adanya vibrasi ulur ini diperkuat dengan adanya serapan pada bilangan gelombang 798,53 cm-1. Pada bilangan gelombang 462,92 cm-1 menunjukkan adanya vibrasi tekuk Si-O dari gugus fungsi Si-O-Si. Kadar asam lemak bebas minyak jelantah awal sebesar 1,024%. Setelah proses adsorpsi penurunan kadar asam lemak bebas tertinggi diperoleh pada waktu kontak 90 menit sebesar 0,59% dengan Kapasitas dan efisiensi adsorpsi sebesar 9,65 mg/g dan 42,383%. Berdasarkan hasil yang diperoleh maka proses adsorpsi menggunakan silika gel dari abu layang kelapa sawit dapat menurunkan asam lemak bebas sehingga dapat memenuhi syarat SNI 01-3741-2013 yaitu maksimal 0,6%.
PENGEMBANGAN MODUL INTERAKTIF (E-MODUL) BERBASIS FLIPBOOK PADA MATA KULIAH DASAR-DASAR KIMIA ORGANIK MATERI ASAM KARBOKSILAT Wijaya, Jefry; Lokollo, Lita
Molluca Journal of Chemistry Education (MJoCE) Vol 14 No 1 (2024): MJoCE
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Pattimura (Chemistry Education Study Program, Faculty of Teacher Training and Educational Sciences, Pattimura University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol14iss1pp38-46

Abstract

Penelitian ini bertujuan untuk: (1) menghasilkan produk e-modul interaktif berbasis Flipbook Dasar-Dasar Kimia Organik; (2) mengetahui tingkat kelayakan dan respon mahasiswa terhadap e-modul Dasar-Dasar Kimia Organik. Metode yang digunakan dalam penelitian ini adalah metode penelitian dan pengembangan (Research and Development, R&D). Subjek uji coba dalam penelitian ini adalah 33 mahasiswa Semester III Program Studi Pendidikan Kimia FKIP Universitas Pattimura. Teknik pengumpulan data dan instrumen penelitian yang digunakan adalah teknik wawancara, lembar validasi dan angket respon mahasiswa. Teknik analisis data yang digunakan dalam penelitian ini adalah analisis deskriptif untuk mendeskripsikan atau menggambarkan data yang telah terkumpul. Hasil penelitian menunjukkan bahwa e-modul Dasar-dasar Kimia organik yang dihasilkan dapat diakses secara online dan offline. E-modul ini dapat digunakan sebagai sumber belajar baik secara mandiri maupun dalam proses pembelajaran. Produk e-modul Dasar-dasar Kimia organik yang dihasilkan memperoleh penilaian layak dari hasil validasi ahli materi dan ahli media, dengan nilai rata-rata 3,6. Uji coba produk e-modul pada mahasiswa memperoleh respon positif yang artinya e-modul ini dapat diimplementasikan dalam pembelajaran.

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