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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 5 Documents
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Search results for , issue "Vol 2 No 2 (2020): Oktober 2020" : 5 Documents clear
Activated Carbon from Sugarcane (Saccharum officinarum L.) Bagasse for Removal Ca2+ and Mg2+ Ion from Well Water Ira Tyas Kurniasari; Cucun Alep Riyanto; Yohanes Martono
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1877

Abstract

Humans need water with good quality to fulfill their needs. Water with high hardness content will have a bad impact if consumed continuously, so the adsorption method is carried out to reduce the concentration of Ca2+ and Mg2+ ions. The adsorption process uses sugarcane bagasse activated carbon (SBAC) and the tested water sample is well water in District Jati, Kudus. Synthesis of SBAC was conducted with H3PO4 30% as an activator at an impregnation ratio of 1:5 (w/w) at temperature 700°C. The FTIR result showed that SBAC contains O-H, C-H, C=C, C≡C, and C-O as functional groups. Analysis result with the XRD instrument showed that the microstructure of SBAC that is formed is turbostatic structure and amorphous. Modeling isotherm suitable for SBAC adsorption on Ca2+ ions is Langmuir isotherm where the R2 value is 0.9134 which shows that the adsorption process occurs chemically and monolayer. Modeling isotherm suitable for SBAC adsorption on Mg2+ ions is Elovich isotherm where the R2 value is 0.8638 which means that the adsorption process is multilayer and adsorption in non-ideal conditions. Modeling kinetics suitable for SBAC adsorption on Ca2+ and Mg2+ ions is Pseudo Orde 2 where the R2 value is 0.9395 and 0.7274. Percent efficiency value of sugarcane activated carbon adsorption of Ca2+ dan Mg2+ ions on District Jati, Kudus well water is 14.44% and 8.94% and 40 minutes stirring time.
The Sintesis dan Karakterisasi Komposit Fe3O4/Kitosan/Kaolin Bangka Eva Julianti; Verry Andre Fabiani; Ristika Oktavia Asriza
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1897

Abstract

Synthesis and characterization of Fe3O4/chitosan/clay Bangka has been carried out. Synthesis of composite was done with variations the composition of clay (0; 25; 50; 100 %) at the composition of Fe3O4 95 mg of Fe3O4 and 1 gr of chitosan. Characterization of composite Fe3O4/chitosan/clay have been analysed with XRD, FTIR, porosity test, the degree of development, and adsorption efficiency test for Cu2+ ion. The results of the analysed with XRD show the difractogram of clay and Fe3O4 at 2θ= 8,92o, 29,57o, and 45,61o (clay); 26,90o, and 35,64o (Fe3O4). Results of the analysed with ftir show the spectrum of the chitosan, clay, and Fe3O4 at 3825, 3689, 2103, 1425 cm-1 (chitosan), 1028, 884,41 cm-1 (clay), 791,11 cm-1 (chitosan) and 696,95 cm-1 (Fe3O4). The results of porosity test and the degree of development showed the high point are 1,547 and 754,63% without composition of clay. The adsorption test for Cu2+ ion show percentage of adsorption efficiency is 72,41% at composite of Fe3O4/chitosan with the clay added 1 gr.
Synthesis of Rare Earth Metal Oxides Based on Monasite Sand with pH Variations Anisa Indriawati; Herman Aldila; Verry Andre Fabiani
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1953

Abstract

In the island of Bangka Belitung, the presence of monazite is quite abundant, monazite minerals contain rare earth metals. Rare Earth Metals are groups of elements that have similar properties, for example neodymium, cerium, lanthanum, and others. Rare earth metal applications are very potential in various fields. In this research, the synthesis of rare earth metals by sol gel method at pH variations of 5.5, 6.5 and 7.5 was carried out. In this case, only changes in the levels of P2O5, La2O3, CeO2, and Nd2O3 compounds were observed. The results showed an increase in levels of rare earth metals. This is indicated by the increase in La2O3 levels by 4,421% from the initial level at pH 7.5 CeO2 which has increased levels by 7,166% at pH 7.5, and Nd2O3 which has increased levels of 5.116% at pH 6.5. On the other hand, of P2O5 has decreased significantly (22.037%) Keyword: Monasite, Rare Earth, Sol Gel, pH
Analysis of Total Terpenoids from Maniltoa Grandiflora (A. Gray) Scheff Leaves Using TLC and HPLC Methods Jhon Patar Sinurat; Visensius Krisdianilo; Reh Malem br Karo; Rinaldo Berutu
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1976

Abstract

Terpenoids screening were carried out using Liebermann Burchard and Salkowski reagent on the extract of Saputangan leaves. It showed that the leaves contained terpenoid compounds with appeared of a reddish brown ring in the extract and a reddish brown stain appeared on the TLC plate tested with 1% CeSO4 reagent in 10% H2SO4. The macerate of saputangan leaves processed separation using the partition method (Liquid-liquid Extraction). Extracts dissolved with methanol were partitioned with n-Hexane and then partitioned between aquadest and ethyl acetate in a ratio of 1: 1 to obtain 50 g of total terpenoids. Furthermore, TLC analysis was performed on total terpenoids using n-hexane: ethyl acetate (80:20 v/v) solvent to obtain 11 separate stains on the TLC plate with different Rf each. Analysis was enhanced in HPLC using 100% acetonitrile and 0.1% phosphoric acid at a wavelength of 210 nm, a flow rate of 0.500 mL/min and eluted for 30 minutes. Based on the HPLC results, there were 25 peaks which indicated the presence of total terpenoid compounds with the highest peak being peak no. 8 (ret.time's 6.234, area's 8503532 and height's 276032), peak no. 9 (ret.time's 6.674, area's 3322572 and height's 141859) and peak no. 10 (ret.time's 7.288, area's 2758231 and height's 103927)
Antibacterial Activity of Flavonoid-Rich Fractions Of Citrus Maxima Peel Extract Reh Malem br Karo; Putranto Manalu; Jhon Patar Sinurat
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1977

Abstract

Natural products can be used as an alternative in the treatment of various diseases such as infectious diseases due to the bioactive compounds contained therein. Moreover nowdays, there are many antibiotic resistance in the treatment of infectious diseases. Citrus maxima is one of the natural products. Citrus maxima have been used for many diseases in traditional medicine.The aim of this study was to investigate the antibacterial activity of flavonoid-rich fractions of citrus maxima peel extract. The bioactive compounds contained in Citrus maxima peel were extracted by maceration method using 96% ethanol solvent. Fractionation was conducted using liquid-liquid extraction using a solvent of water and ethyl acetate obtained ethyl acetate fraction. In this fraction, the TLC test was carried out to confirm the presence of phenolic and flavonoid compounds. The antibacterial activity testing for ethyl acetate fraction against S.aureus and E.coli was determined by disk diffusion method with concentration of 25 ppm, 50 ppm, 75 ppm and 100 ppm. The ciprofloxacin and distilled water were used as positive and negative control, respectively. The result of this study showed that ethyl acetate fraction ( flavonoid-rich fractions) Of Citrus Maxima has potential as antibacterial for bacterial S.aureus and E.coli with medium inhibitory ability in all of concentration ranges. The highest inhibition zone for S.aureus was found at a concentration of 100 ppm while for E.coli was at a concentration of 75 ppm.

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