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INDONESIA
JURNAL ATOMIK
Published by Universitas Mulawarman
ISSN : 25490052     EISSN : 25490052     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
Jurnal Atomik (JA) is published twice a year (March and August) by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Mulawarman University. Jurnal Atomik is a media for graduate students of Department of Chemistry to publish their research articles in Chemistry field including Analytical Chemistry, Inorganic Chemistry, Physical Chemistry, Organic Chemistry, and Biochemistry. The research articles that be submitted to Jurnal Atomik have to be approved by Editorial Board and in accordance with the rules of writing approved by Editor of Jurnal Atomik.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 9 No 2 (2024)" : 12 Documents clear
ADSORPSI ION LOGAM KADMIUM (II) MENGGUNAKAN MAGNETIT (Fe3O4)-ARANG AKTIF KULIT BUAH TATAP (Artocarpus odoratissimus) Fatmawati, Ririn Anggraeni; Koesnarpadi, Soerja; Wirawan, Teguh
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1412

Abstract

Adsorption of cadmium (II) metal ions has been carried out using magnetite adsorbent (Fe3O4) and Fe3O4-activated charcoal composite of tarap fruit peel (Fe3O4-AA). The Fe3O4 adsorbent was made using the coprecipitation method from FeSO4.7H2O and FeCl3.6H2O with a mole ratio of 1:1. Composite adsorbent Fe3O4-activated charcoal from tarap fruit peel from Fe3O4 combined with activated charcoal from tarap fruit peel. The separation process uses the help of an external magnet, and the cadmium concentration is analyzed using an Atomic Absorption Spectrophotometer (SSA). on the adsorbent. The results of characterization using FT-IR on Fe3O4 show the presence of Fe-O groups and on Fe3O4-AA it shows the presence of Fe-O and -OH groups and there are C-O groups from activated charcoal. In XRD analysis, diffraction peaks were obtained which were not much different from standard Fe3O4Fe3O4 with a smooth and sharp crystal structure. Furthermore, in the VSM analysis, results were obtained in the form of magnetization curves which showed that Fe3O4 and Fe3O4-AA were superparamagnetic. The optimum conditions for the magnetite (Fe3O4) adsorbent at pH 6 with a contact time of 60 minutes and an adsorption capacity of 23.3664 mg/g, while the optimum conditions for the composite adsorbent Fe3O4-AA at pH 5 with a contact time of 45 minutes and a maximum adsorption capacity of 26.4550 mg/g. The absorption percentage of the Fe3O4 adsorbent was 95.042% and the Fe3O4-AA adsorbent was 95.092%.
AKTIVITAS ANTIOKSIDAN TUMBUHAN GENUS MANGIFERA DENGAN METODE DPPH (1,1-diphenyl-2-picrylhydrazyl) : MINI REVIEW Jannah, Nurul; Hairani, Rita; Marliana, Eva
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1394

Abstract

Mangifera is a genus of the Anacardiaceae family of mangoes spread across Sumatra, Kalimantan, Java, and Bali. Several species of the genus Mangifera have been extensively researched on phytochemistry and antioxidant activity using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method. The study explains that several species of the genus Mangifera contain secondary metabolite compounds, such as flavonoids, phenolics, tannins, saponins, alkaloids, triterpenoids, and quinones. The results of several studies explain that the Mangifera genus has antioxidant activity with an inhibitory concentration (IC50) value generally <50 ppm, which is a strong category, so it has the potential to be an antioxidant. Keywords : Mangifera, phytochemical screening, antioxidant activity

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