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All Journal VALENSI KOVALEN: Jurnal Riset Kimia Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Jurnal Saintek Lahan Kering Jurnal Fisika : Fisika Sains dan Aplikasinya Mattawang: Jurnal Pengabdian Masyarakat Hydrogen: Jurnal Kependidikan Kimia Gatranusantara Safari : Jurnal Pengabdian Masyarakat Indonesia Molekul: Jurnal Ilmiah Kimia Jurna Beta Kimia Chemistry Notes
Johnson N Naat
Universitas Nusa Cendana
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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Pembuatan Polymer Inclusion Membrane (PIM) Teremban 2,4,5-Trimetoksikalkon dan Uji Kompatibilitasnya Reinner Ishaq Lerrick; Darius Toge Kore; Philiphi de Rozari; Febri Odel Nitbani; Fidelis Nitti; Johnson N Naat
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 2 (2025): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.2.96111.305-314

Abstract

Polymer Inclusion Membrane (PIM) telah menjadi perangkat baru untuk mengekstraksi ion logam terutama dari larutan, karena selektivitas dan sensitivitasnya yang mudah disesuaikan melalui pembuatannya yang mudah. Ragam senyawa ekstraktan telah banyak dikembangkan dalam studi ekstraksi logam berbasis PIM. Namun, senyawa kalkon dan turunannya yang umum diketahui sebagai ekstraktan dan sensor logam, belum ditemukan penggunaannya dalam studi terkait PIM. Pada riset ini, senyawa 2,4,5-trimetoksikalkon, disintesis dari oksidasi minyak asaron asal Timor menggunakan ozon dan diikuti oleh reaksi kondensasi aldol dengan asetofenon, akan diembankan ke dalam matriks PIM PVC/D2EHPA. PIM yang disiapkan tersebut kemudian dikarakterisasi menggunakan Fourier Transform Infrared (FTIR) dan Scanning Electron Microscopy (SEM), serta dipelajari kompatibilitasnya. PIM yang mengandung 60% PVC, 40% D2EHPA dan berbagai konsentrasi 2,4,5-trimetoksikalkon (25, 20, 15, 10, dan 5 ppm) mempunyai sudut kontak air masing-masing sebesar 51,939º, 51,665º, 51,318º, 51,151º, dan 50,863º; serta nilai penyerapan air masing-masing sebesar 9,80%; 9,82%; 9,54%; 9,68%; dan 9,76% yang menunjukkan bahwa PIM yang dihasilkan bersifat hidrofilik. Sementara itu, hasil pengukuran kuat tarik dan persentase perpanjangan menunjukkan bahwa PIM tersebut bersifat fleksibel dengan nilai yang diperoleh masing-masing 12,15; 11,96; 11,91; 10,95; 10,22 MPa dan 32,7; 86,6; 127; 156,7; 166,7%.Preparation of Polymer Inclusion Membrane (PIM)-Embedded 2,4,5-Trimethoxychalcone and Its Compatibility Study. Polymer Inclusion Membrane (PIM) has become an emerging device for extracting metal ions, especially from solution, due to its selectivity and sensitivity fine-tuned through facile preparation. Chalcones, as well as their derivatives, which are known as metal extractants and sensors, have not been employed in PIM-related studies. In this research, the compound 2,4,5-trimethoxychalcone, synthesized sequentially over Timor’s asarone oil oxidation using ozone, followed by Aldol condensation reaction with acetophenone, was embedded into the PVC/D2EHPA PIM matrices. The prepared PIM was then characterized using Fourier transform infrared (FTIR) and Scanning electron microscopy (SEM), and was studied for its compatibility. PIM contained 60% PVC, 40% D2EHPA and varied 2,4,5-trimethoxychalcone (25, 20, 15, 10, and 5 ppm) had water contact angles values of 51.939º, 51.665º, 51.318º, 51.151º, 50.863º, and water uptake of 9.80%, 9.82%, 9.54%, 9.68%, 9.76% respectively, which indicated that the resulting PIM was hydrophilic. Meanwhile, the tensile strength and elongation percentage showed that those PIM were flexible with the obtained values of 12.15, 11.96, 11.91, 10.95, 10.22 MPa and 32.7, 86.6, 127, 156.7, 166.7%, respectively.
IDENTIFIKASI MIKROPLASTIK PADA IKAN TONGKOL (Euthynnus affinis) SEBAGAI BIOINDIKATOR DI PERAIRAN TELUK KOTA KUPANG Nitti, Fidelis; Nalle, Tamara Baba; Boymau, Benyamin; Anait, Johanes R.; Kadang, Luther; Ola, Antonius R.B.; Baunsele, Since D.; Naat, Johnson N.
Chemistry Notes Vol 7 No 2 (2025): Chem. Notes, 7(2), 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v7i2.23042

Abstract

Microplastic pollution in coastal areas has become a serious concern due to its impact on marine environments and human health. This study examined the presence of microplastics in the digestive tracts of the tongkol fish (Euthynnus affinis) collected from two locations in Kupang Bay, namely PPI Oeba and Pasar Oesapa. A total of 16 fish samples were analyzed visually using a microscope, followed by polymer identification using Fourier Transform Infrared Spectroscopy (FTIR). Results showed that fish from PPI Oeba contained 25 microplastic particles, while those from Pasar Oesapa had 20 particles. Film-type microplastics dominated, accounting for 68% in PPI Oeba and 75% in Pasar Oesapa, followed by fibers (20% and 25%, respectively), and fragments were only found in PPI Oeba (12%). Detected polymers included polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). This study confirms that tongkol fish can serve as effective bioindicators for monitoring microplastic pollution in the coastal waters of Kupang City.
Co-Authors Abner Tonu Lema Anait, Johanes R. Anarato, Antonius Umbu Anselmus Boy Baunsele Antonius R.B. Ola Arsel A. Pau Riwu Atandau, Eny C.R.K. Baunsele, Anselmus B. Baunsele, Since Dortia Boymau, Benyamin Darius Toge Kore Deram, Rosalia Febriana Dewi, Ni Wayan O. A.C Dewi, Ni Wayan OAC Dwi Siswanta Dyah Iswantini Eka C.G. Kerihi Erly Grizca Boelan Faderina Komisia Febri Odel Nitbani Fidelis Nitti Haki, Horiana Heru Christianto Hildegardis Missa I Gusti M.N. Budiana Ida Ayu Putu Sri Widnyani Kadang, Luther Kalista L.K. Tanone Kalla, Eka B.S. Kapitan, Origenes Boy Kasimir Sarifudin Kefi, Lidia Graciana Kopon, Aloisius Masan Lalang, Arvinda C. Lapailaka, Titus Lawa, Yosep Leba, Maria A. U. Lestarani, Dewi Luther Kadang Maria Benedikta Tukan Masruroh Masruroh Modhe, Katarina Nalle, Tamara Baba Nenohai, Jacky A. Nenohai, Jacky Anggara Neolaka, Yantus A B Parera, Lolita A. M. Parera, Lolita Agusta Magdalena Philiphi de Rozari Pingak, Redi Kristian Rachmat Triandi Tjahjanto Rahayu Rahayu Rahmat Basuki Reinner Ishaq Lerrick Rensini, William Antoni Sherlly Ledoh Sudirman Sudirman Sudriman Taek, Maximus M. Tamonob, Mulyanti Toni, Samuel Tukan, Gerardus D. Vebriani Kull Yanpitherszon Liunokas Yohana K Nubatonis Yosep Lawa