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All Journal Techno: Jurnal Penelitian SAINTIFIK@ : Jurnal Pendidikan MIPA
Fadlan Muin
Universitas Khairun
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Education Social Sciences Other

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Analysis of Ni2+ Metal Adsorption on Chitosan Membrane with Density Functional Theory (DFT) Method Muhammad Adrian Natsir; Zulkifli Zam Zam; Fadlan Muin; Sudir Umar
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4182

Abstract

This study aims to modeling the membrane structure of chitosan containing nickel metal and determine the adsorption energy and energy gap of the chitosan molecular structure containing nickel metal. The molecular structure modeling was carried out using a computer using Avogadro software and analyzed with GaussView 6 software. The results of shape optimization using the Density Functional Theory (DFT) method with the basis set B3LYP/LanL2DZ were the total energy of the chitosan-Ni compound. The analysis revealed the interaction between the structure of chitosan and metal Ni. Determination of the structural model of chitosan and Ni metal shows a stable molecular geometry with an electronic energy value of 38826.90 eV in chitosan-Ni with a linear molecular geometry. Modeling the structure of chitosan with nickel metal shows the presence of bonds between nickel metal and chitosan in the inter glycosidic bonding region with a bond length of 1.92 for Ni-N and 1.81 for Ni-O. The adsorption energy of the chitosan structure with nickel is -18.236 eV. The energy gaps in the structure of chitosan-Ni, chitosan, and Ni are 0.10456, 0.23481, and 0.10213 eV.
Analysis of Ca2+ and Fe2+ Ions in Ngade Water and Tolire Lake Water Ternate, North Maluku Fadlan Muin; Muhammad Amin; Saras Wati Banapon
TECHNO: JURNAL PENELITIAN Vol 11, No 2 (2022): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i2.5091

Abstract

This study aims to obtain optimal and valid conditions for the analysis of inorganic ions Ca2+ and heavy metal Fe2+ and the comparison between inorganic ions Ca2+ and heavy metal ions Fe2+ contained in the water of Lake Ngade and Lake Tolire, using ion chromatography and UV-Vis spectrophotometry. This type of research is experimental laboratory. Based on the results of the research, the concentrations obtained from Ca2+ ions and Ca2+ ions are for the highest concentration of Ca2+ ions in Lake Ngade water at 1.259 ppm, Big Tolire Lake water at 3.410 ppm and Small Tolire Lake water at 6.154 ppm. Meanwhile, the highest concentration of Fe2+ ions is in Lake Ngade water at 5.606 ppm, Big Tolire Lake water at 5.500 ppm, and Small Tolire Lake water at 5.379 ppm.
PENGARUH MODEL PEMBELAJARAN LATIHAN INKUIRI TERHADAP HASIL BELAJAR SISWA PADA MATERI LARUTAN ASAM BASA KELAS XI SMA NEGERI 7 HALMAHERA TIMUR Fatmawati Fatmawati; Nur Asbirayani Limatahu; Fadlan Muin
SAINTIFIK@: Jurnal Pendidikan MIPA Vol 7, No 2 (2022): SAINTIFIK@: Jurnal Pendidikan MIPA EDISI OKTOBER 2022
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.503 KB) | DOI: 10.33387/saintifik.v7i2.5503

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran latihan inkuiri terhadap hasil belajar siswa pada materi larutan asam basa kelas XI SMA Negeri 7 Halmahera Timur. Penelitian ini merupakan penelitian eksperimen dengan desain pretest-posttes one group desain. Sampel dalam penelitian ini adalah siswa kelas XI IPA-1 SMA Negeri 7 Halmahera Timur yang berjumlah 15 siswa dengan teknik pengambilan sampelnya yaitu secara sampling jenuh. Teknik analisis data yang digunakan yaitu dengan analisis uji wilcoxon yang dihitung dengan menggunakan SPSS versi 21. Hasil penelitian menunjukkan bahwa terdapat pengaruh model pembelajaran latihan inkuiri terhadap hasil belajar siswa pada materi larutan asam basa kelas XI SMA negeri 7 Halmahera Timur dengan hasil uji hipotesisnya diperoleh data signifikansi 0,0010,05 dan presentase nilai gain sebesar 69 % dengan kategori sedang.
Co-Authors Fatmawati Fatmawati Muhammad Adrian Natsir Muhammad Amin Nur Asbirayani Limatahu Saras Wati Banapon Sudir Umar Zulkifli Zam Zam