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All Journal Indonesian Journal of Chemistry Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya
Rahmah, Vindi Annisa
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Modification of Chitosan using Fe3O4 and Glucose and Its Application for Phenol Removal Rizki, Widya Twiny; Lestari, Siti Marwah; Rahmah, Vindi Annisa; Dauli, Rd Rahmat
Indonesian Journal of Chemistry Vol 25, No 5 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103140

Abstract

In this study, chitosan was modified with Fe3O4 and glucose to enhance its capacity and effectiveness in adsorbing phenol from organic waste. XRD analysis revealed distinct differences between unmodified chitosan and the Fe3O4/glucose-modified version, with the resulting nanocomposite showing a particle size of 17.21 nm. FTIR spectra exhibited new, sharper peaks at 531 and 544 cm−1, indicating interactions between chitosan and Fe3O4 via the nitrogen atom in the NH2 group. VSM characterization showed a saturation magnetization of 63.4 emu/g, confirming that the chitosan/Fe3O4/glucose nanocomposite is superparamagnetic. SEM analysis revealed an uneven, porous surface, while the morphology displayed dark Fe3O4 spots dispersed across a lighter chitosan matrix. The optimal adsorption condition was achieved at a contact time of 60 min, with an adsorption efficiency of 16.46%. In addition to reducing phenol content in wastewater, the modified nanocomposite also exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli. This multifunctional material offers a promising solution for wastewater treatment, targeting both organic pollutants and pathogenic bacteria to help address water pollution challenges.
SKRINING POTENSI EKSTRAK KULIT JANTUNG PISANG KEPOK (Musa paradisiaca Linn.) SEBAGAI ZAT ANTIBAKTERI Rahmah, Vindi Annisa; Kurniawan, Agung; Rizki, Widya Twiny; Lestari, Siti Marwah; Khutami, Chindiana
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 7 No. 2 (2025): Literasi Artikel Penelitian Kimia
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v7i2.6086

Abstract

Abstract Indonesian Food and Drug Authority or BPOM no longer recommends the use of synthetic preservatives due to their toxic properties and potential carcinogenic risks. One of the natural ingredients that is potential as a natural preservative is the peel of kepok banana blossom (Musa paradisiaca Linn.), which is known to contain secondary metabolites with microbial activity, including steroids, terpenoids, saponins, tanning, alkaloid, flavonoids, and phenols. This study aim to determine the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) in Staphylococcus aureus bacteria. The peel extract of kepok banana blossom (Musa paradisiaca Linn.) was obtained by maceration with a mixture of 96% ethanol: 3% Citric Acid (85:15) solvent. Concentration of extract varied from 12.5%; 25%; 50%; until 100%, it is used for antibacterial activity test in which aquadest as a negative control and Chloramphenicol as a positive control. The Minimum Inhibitory Concentration (MIC) test was conducted using the liquid macrodilution method and the Minimum Bactericidal Concentration (MBC) test was conducted using the spread method. The Minimum Inhibitory Concentration (MIC) value was obtained at a concentration of 50% and the Minimum Bactericidal Concentration (MBC) value was obtained at a concentration of 100%. The peel extract of Kepok banana blossom (Musa paradisiaca Linn.) with a concentration of 50% was able to inhibit the growth of Staphylococcus aureus bacteria and with a concentration of 100% was able to kill Staphylococcus aureus bacteria. Keywords: kepok banana blossom peel extract, natural preservatives, antibacterial acitivity test Abstrak Badan Obat dan Makanan atau BPOM telah menyarankan untuk menghindari penggunaan bahan pengawet sintesis karena cenderung toksi dan karsinogenik. Salah satu bahan alam yang berpotensi sebagai pengawet alami yaitu kulit jantung pisang kepok (Musa paradisiaca Linn.), yang diketahui mengandung metabolit sekunder yang berfungsi sebagai senyawa antimikroba diantaranya steroid, terpenoid, saponin, tanin, alkaloid, flavonoid dan fenol. Penelitian ini bertujuan untuk menentukan Konsentrasi Hambat Minimum (KHM) dan Konsentrasi Bunuh Minimum (KBM) pada bakteri Staphylococcus aureus. Ekstrak kulit jantung pisang (Musa paradisiaca Linn.) diperoleh dengan cara maserasi dengan pelarut yang terdiri dari campuran etanol 96% : Asam Sitrat 3% (85:15). Variasi konsentrasi ekstrak dibuat untuk pengujian aktivitas antibakteri dari 12,5%; 25%; 50%; hingga 100%, aquades sebagai kontrol negatif dan Kloramfenikol sebagai kontrol positif. Uji Konsentrasi Hambat Minimum (KHM) dilakukan dengan metode makrodilusi cair dan uji Konsentrasi Bunuh Minimum (KBM) dilakukan dengan metode sebar (spread). Nilai Konsentrasi Hambat Minimum (KHM) didapatkan pada konsentrasi 50% dan nilai Konsentrasi Bunuh Minimum (KBM) didapatkan pada konsentrasi 100%. Berdasarkan hasil penelitian ini, ekstrak kulit jantung pisang (Musa paradisiaca Linn.) dengan konsentrasi 50% diketahui mampu menghambat pertumbuhan bakteri Staphylococcus aureus dan dengan konsentrasi 100% mampu membunuh bakteri Staphylococcus aureus. Keywords: ekstrak kulit jantung pisang, pengawet alami, uji aktivitas antibakteri
Co-Authors Agung Kurniawan Khutami, Chindiana Rd. Rahmat Dauli Rizki, Widya Twiny Siti Marwah Lestari