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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 99 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%.
Influence of Coagulant Concentration on Protein Content and Flavor of Tofu Derived from Soybean (Glycine max) Aditya Ayuwulanda; Ilham Rahmatullah; Fida Madayanti Warganegara; M. Alvien Ghifari; Rahmat Kurniawan
Stannum : Jurnal Sains dan Terapan Kimia Vol 8 No 1 (2026): April 2026
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v8i1.4397

Abstract

The determination of tofu quality generally relies on several key factors: taste, texture, color, and nutritional value. These factors can be influenced by the concentration of coagulants applied during tofu production. Coagulants are categorized into several types, namely: acids, lactones, and salts. The primary objective of this research was to identify the optimal concentrations of acetic acid and salt as coagulants, while also analyzing the resultant tofu quality in terms of water content, protein concentration, and organoleptic attributes. In this study, pH measurements indicated an inverse relationship between coagulant concentration and pH value – higher coagulant concentration corresponded to lower pH values. The analysis of water content, utilizing the gravimetric method, revealed that the ideal water content range for tofu falls between 78-85%. Among the concentrations tested, the panelists exhibited a preference for tofu coagulated with 0.2% salt, awarding it a mean score of 4.10 in the organoleptic assessment. The analysis of soluble protein concentrations in tofu samples, employing the Lowry method, unveiled that tofu coagulated with 0.6% salt exhibited a notably high protein concentration of 10.26 ± 0.25 mg/mL. The protein concentration observed is intricately influenced by both the type and concentration of coagulants, which play a pivotal role in agglomerating soy milk proteins. Consequently, this study postulates that the protein content of tofu coagulated with salt leans towards containing 11S globulin, thereby contributing to the higher protein content observed.
Study Of Potential Methane Gas In TPA Air Belo Using Total Solid Method Nurhadini Nurhadini
Stannum : Jurnal Sains dan Terapan Kimia Vol 8 No 1 (2026): April 2026
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v8i1.5442

Abstract

Waste management, greenhouse gas emissions and energy issues are caused by population growth which increases every year. Along with population growth, the need for product consumption and fuel consumption will also increase. This causes an increase in waste generation and a decrease in energy reserves. Addition, waste processing in the final processing at the TPA with a controlled landfill system produces greenhouse gas emissions. Therefore, to overcome these problems, it is necessary to study the condition of the Air Belo TPA and the potential of methane gas as a renewable energy source to provide a solution to these problems. Based on the analysis of the existing condition of the Air Belo TPA, it is necessary to handle the volume of waste so that it does not exceed the capacity of the TPA. Furthermore, based on the analysis of the methane content using the TS method, it is known that the methane gas produced is 95.92 tons/year to 335.6 tons/year. Based on these results, the methane gas produced has the potential to be developed as an alternative source of local residents
Karakterisasi Hidrogel Selulosa/CMC dari Limbah Kelapa Sawit Terikat Silang Sitrat Fernando Nainggolan; Trisno Afandi
Stannum : Jurnal Sains dan Terapan Kimia Vol 8 No 1 (2026): April 2026
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v8i1.6052

Abstract

Despite being produced in relatively considerable quantities by industry, oil palm fibers waste is still seldom applied. One alternative use of oil palm fibers is as cellulose which is applied as a hydrogel. To ascertain the characteristics of the cellulose hydrogel of oilm palm fibers, we synthesized a cellulose/CMC cross-linked citrate hydrogel. In this paper, we confirmed the isolated cellulose from oilm palm fibers waste is up to 39.83% and the characteristics of the synthesized hydrogel are smooth surface morphology with swelling percentage of about 300%. Therefore, we hope that the hydrogel of cellulose/CMC cross-linked citrate can be a product as a solution of the oil palm fibers waste in industry.
Kinetics Investigation of Methylene Blue Adsorption on Activated Carbon Derived from Coffee Husk Wate Paesal Bakri; Multazam Multazam; Sulistiyana Sulistiyana
Stannum : Jurnal Sains dan Terapan Kimia Vol 8 No 1 (2026): April 2026
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v8i1.7635

Abstract

Methylene Blue (MB) is a colored substance that pollutes the environment and can cause poisoning if inhaled. Adsorption using activated carbon offers a promising solution to this pollution. This study aims to determine the optimum contact time and adsorbent mass for methylene blue adsorption using coffee husk activated carbon. It also analyzes the adsorption kinetics, including reaction order and reaction rate constant. This study employed an experimental research design with a quantitative approach. The methodology involved manufacturing actived carbon from coffee husk waste through carbonization and acetic acid activation, followed by tests for water and ash content. Subsequent stages focused on determining the optimum adsorbent mass (0.03g; 0.05g, 0.10g, and 0.15g) and optimum contact time (30, 60, 90, 120, and 150 minutes). Results indicated an activated carbon water content of 8.6% and an ash content achieving 4.6%. the optimum adsorbent mass was 0.1g, achieving 84.80% adsorption efficiency, while the optimum contact time was 90 minutes, with an efficiency of 84.45%. adsorption kinetics analysis revealed that the process followed a second-order kinetic model, caharacterized by an R2 value of 1 and a rate constant of 0.00167 M-1.minutes-1.
Analysis of Iron (Fe) Removal from Post-Tin Mining Ponds Using Sugarcane Bagasse Activated Carbon: A Case Study in Riding Panjang Village, Bangka Regency Jessika Jessika; Janiar Pitulima; Delita Ega Andini
Stannum : Jurnal Sains dan Terapan Kimia Vol 8 No 1 (2026): April 2026
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v8i1.7809

Abstract

The Bangka Belitung Islands Province is one of Indonesia’s major tin-producing regions, where extensive mining activities have generated numerous post-mining ponds containing heavy metals that threaten aquatic ecosystems and environmental sustainability. This study evaluated the effectiveness of activated carbon derived from sugarcane bagasse for the removal of iron (Fe) from water collected from a post-tin mining pond in Riding Panjang Village, Bangka Regency, Indonesia. A quantitative experimental method was employed using a continuous adsorption system. The effects of adsorbent dosage (1, 2, and 3 g) and contact time (15, 30, 45, and 60 min) were investigated through 12 experimental runs using 1.2 L of pond water per treatment. Initial concentrations of Fe were 0.246 mg/L, respectively. Removal efficiencies were determined by comparing metal concentrations before and after treatment. The results showed that sugarcane bagasse activated carbon effectively reduced the concentrations of all investigated metals. The highest Fe removal efficiency (62.60%) was achieved using 1 g of activated carbon with a contact time of 45 min, decreasing the concentration from 0.246 mg/L to 0.092 mg/L. These findings suggest that sugarcane bagasse activated carbon is a low-cost, sustainable, and environmentally friendly adsorbent for treating heavy metal-contaminated water in post-tin mining areas.

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