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Gedung Dharma Pengabdian, Department of Chemistry, Faculty of Engineering, Kampus Tepadu Universitas Bangka Belitung Balunijuk, Kab. Bangka, Prov. Kep. Bangka Belitung
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Stannum : Jurnal Sains dan Terapan Kimia
Published by Universitas Bangka Belitung
ISSN : 2714674X     EISSN : 27148173     DOI : https://doi.org/10.33019/jstk
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering
Jurnal Sains dan Terapan Kimia published research article, minireview/review, and short communication that included studies in Inorganic Chemistry, Organic Chemistry, Analitycal Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Chemical Engineering, and Applied Chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 94 Documents
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Removal Co(II) Ions in Aqueous Solution using Fe-MCM-41: Penghilangan Ion Co(II) dalam Larutan Berair menggunakan Fe-MCM-41 Syamsuri, M. Mahfudz Fauzi; Febriani, Weni; Sutarno, Sutarno; Suyanta, Suyanta
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.5481

Abstract

The removal of Co(II) ions using Fe-MCM-41 adsorbent was studied. Fe-MCM-41 was synthesized by the sonochemical method and then interacted with solutions containing Co(II) ions at various concentrations. The Langmuir equation indicated monolayer adsorption could be well-fitted for the adsorption isotherms. The maximum adsorption capacity of Co(II) ions on Fe-MCM-41 was 62.89 mg/g. Therefore, it could be conclude that the concentration of Co(II) ions in an aqueous solution can be reduced by using Fe-MCM-41 adsorbent.
Adsorption Study of Carbon Chitosan Composite Beads from Ketapang Fruit Shell (Terminalia catappa L) on Methylene Blue Dyes: Kajian Adsorpsi Beads Komposit Kitosan Karbon Cangkang Buah Ketapang (Terminalia catappa L) Terhadap Zat Warna Metilen Biru Nurwidiyani, Ria; Sigiro, Chelin Dion; Putranto, Agus Martono Hadi; Triawan, Deni Agus
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.5631

Abstract

Carbon chitosan composite beads were synthesized using chitosan and activated carbon from Ketapang fruit shells (Terminalia catappa L) using PVA as a crosslinker. The adsorbent was synthesized with a chitosan: activated carbon ratio of 0.8 grams versus 0.2 grams. Material characterization using FTIR shows the presence of C-O, N-H, C-N, C=O, C-H, and -OH functional groups. Adsorption of carbon chitosan composite beads on methylene blue achieved maximum results at a contact time of 75 minutes using an adsorbent mass of 0.15 grams with an adsorption percentage reaching 97%. The adsorption kinetics follows a pseudo second order kinetic model with a k value of 1.3467 mg-s-.
Analisis Fitokimia dan Uji Aktivitas Antioksidan Ekstrak Aseton Daun Kelor (Moringa oleifera) Ashari, Arif; Meilita, Dwi; Ciptati; Kurniawan, Rahmat; Sudarmanto, Irwan; Agung, Ahmad Anggraria Jaya; Abdussalam, Moch
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 2 (2025): October 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/nqv16v61

Abstract

Indonesia’s rich biodiversity includes Moringa oleifera, widely used in traditional medicine. However, environmental factors such as climate, soil, and agronomic practices can influence the phytochemical composition and bioactivity of its leaves. This study aimed to investigate the phytochemical profile and antioxidant activity of acetone extracts of M. oleifera leaves sourced from South Lampung. Leaves were air-dried, powdered, and extracted via maceration in acetone. Phytochemical screening employed standard reagents (Dragendorff’s and Mayer’s for alkaloids; Mg and HCl for flavonoids; Liebermann–Burchard for steroids and triterpenoids; FeCl₃ for tannins; foam test with 2 N HCl for saponins). Antioxidant capacity was assessed using the DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. Phytochemical screening revealed the presence of alkaloids, flavonoids, steroids, triterpenoids, and tannins, while saponins were not detected. In the DPPH assay, percentage inhibition increased with concentratio, yielding an IC₅₀ of approximately 209.4 ppm. This relatively high IC₅₀ indicates weak radical-scavenging activity under the present conditions. The findings provide the first detailed report of phytochemical constituents and DPPH-based antioxidant capacity for acetone extracts of M. oleifera leaves from South Lampung. Although secondary metabolites with known bioactivities were detected, the weak DPPH scavenging suggests that acetone may not optimally extract the most potent antioxidant compounds or that local growth conditions yield lower phenolic/flavonoid concentrations.
SINTESIS α-TERPINEOL DARI MINYAK ATSIRI TUMBUHAN SAPU-SAPU DENGAN MENGGUNAKAN KOMBINASI KATALIS ASAM ALAMI BUAH JERUK KUNCI DAN ASAM SINTETIS Ependi, Eresti; Roanisca, Occa; Nurhadini, Nurhadini
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 2 (2025): October 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/76wtwt95

Abstract

Synthesis is an integration of two or more existing elements to produce a new result. Key orange (Citrus x microcarpa Bunge) is a Bangka Belitung plant that contains citric acid with a high acidic taste. Its high acidic nature can be used as a catalyst that can accelerate the reaction rate in synthesizing an α-terpineol compound from α-pinene contained in broomstick essential oil. The synthesis of α-terpineol can be done using combined and uncombined catalysts, namely 15% sulfuric acid, 99.5% acetic acid and natural citric acid from key lime juice. This study aims to determine the optimum composition of the catalyst combination of sulfuric acid, acetic acid and key lime juice in synthesizing α-terpineol compounds and the level of α-terpineol produced from the synthesis. The optimum result of the combination of catalysts that can synthesize α-pinene into α-terpineol quite well is using 15% sulfuric acid as much as 1 ml, 99.5% acetic acid as much as 1 ml and citric acid from key orange juice as much as 3 ml. The results of α-terpineol content of each catalyst are Product 1 by 33.14%, Product 2 by 6.36%, Product 3 by 1.00%, Product 4 by 17.32% and Product 5 by 18.43%.

Page 10 of 10 | Total Record : 94

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