cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Robby Gus Mahardika
Contact Email
robby@ubb.ac.id
Phone
+6285769532458
Journal Mail Official
-
Editorial Address
Gedung Dharma Pengabdian, Department of Chemistry, Faculty of Engineering, Kampus Tepadu Universitas Bangka Belitung Balunijuk, Kab. Bangka, Prov. Kep. Bangka Belitung
Location
Kab. bangka,
Kepulauan bangka belitung
INDONESIA
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 74 Documents
 1   2   3   4   5 
Pengaruh Temperatur Deproteinasi Pada Deasetilasi Kitin Cangkang Udang Krosok (Penaeus semisulcatus) Terhadap Adsorpsi Logam Besi (Fe) Herman Aldila; Asmar Asmar; Verry Andre Fabiani; Desy Yuliana Dalimunthe; Megiyo Megiyo; Riko Irwanto
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 1 (2020): April
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i1.1722

Abstract

Penelitian ini bertujuan menganalisis pengaruh variasi temperatur deproteinasi pada daya adsorbsi kitosan udang krosok (Penaeus semisulcatus) terhadap logam besi (Fe) pada air kolong bekas penambangan timah timah di Pulau Bangka. Bahan baku kitosan yang digunakan dalam penelitian ini merupakan limbah cangkang udang krosok dari industri rumah tangga pembuatan ebi. Kitosan limbah cangkang udang ebi telah disintesis dalam tiga tahapan meliputi: deproteinasi, demineralisasi, dekolorisasi dan deasetilasi. Pada penelitian ini proses sintesis menggunakan variasi temperatur deproteinasi masing-masing: 30oC, 60oC, dan 90oC. Berdasarkan analisis data FTIR, dapat ditentukan nilai derajat deasetilasi sampel berturut-turut sebesar: 32,01% ; 30,94% dan 28,74%. Peningkatan temperatur deproteinasi menyebabkan nilai derajat deasetilasi kitosan menjadi menurun. Penurunan ini diakibatkan oleh rusaknya struktur kitin pada sampel akibat temperatur yang meningkat. Kandungan logam Fe pada air kulong yang digunakan dalam penelitian ini mencapai 6,1 ppm. Adsorbsi kitosan pada logam Fe dapat menurunkan kadar terlarut mencapai rata-rata 99,67% dari kadar awal. Kandungan gugus hidroksil pada kitosan menyebabkan terjadinya reaksi pembentukan senyawa hidroksida turunan dari logam besi terlarut. Senyawa besi hidroksida tersebut akan terpisah dari air dan membentuk endapan. Semakin besar nilai derajat deasetilasi maka akan semakin besar kandungan gugus hidroksil sehingga menyebabkan daya adsorbsi kitosan semakin meningkat.
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.
SINTESIS DAN KARAKTERISASI KOMPOSIT KAOLIN-TiO2 DARI ILMENIT BANGKA UNTUK FOTODEGRADASI ZAT WARNA RHODAMIN B Rezalia Annisa; Verry Andre Fabiani; Nurhadini Nurhadini
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 1 (2021): April 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i1.2075

Abstract

The synthesis and characterization of kaolin-TiO2 from ilmenite composite as a degradation of rhodamine B dye was prepared. Natural kaolin from Air Bara, Central Bangka and ilmenite from BPM Unit Metalurgi PT. Timah (Persero), Tbk., Mentok Bangka Belitung. The kaolin sample was chemically activated and the ilmenite was carried out leaching with acid (HCl), then the ilmenite was calcined at temperature of 700°C to obtain the anatase phase. Synthesis of kaolin-TiO2 from ilmenit using the precipitation method using ethanol as a solvent, the composite using with 3 variation of kaolin mass i.e 0,2; 0,4 and 0,6 (w/w). The fungsional groups and the phase structure of kaolin-TiO2 from ilmenite was analyzed using FTIR and XRD, then the composite was applied to rhodamine B solution to determine the percentage of degradation in the solution by UV-Vis Spectrophotometry analysis. Degradation was carried out by adding 150 mg kaolin-TiO2 to 25 mL of rhodamine B solution and degradation process by irradiating UVC light. Based on FTIR and XRD data should that kaolin-TiO2 from ilmenite was formed composite. The optimum variation of kaolin mass in the composite composition of 0,4:3 (w/w). Based on UV-Vis Spectrophotometry data, rhodamine B solution with composite kaolin-TiO2 as catalyst was able to degrade rhodamine B up to 87,7% with the largest percentage of degradation at the 40 minutes. Keyword : ilmenite, kaolin, kaolin-TiO2, degradation, rhodamine B
Uji Aktivitas Antiinflamasi Ekstrak Etanol Daun Belimbing Wuluh (Averrhoa bilimbi L.) Terhadap Penghambatan Denaturasi Protein Dheani Sepalia Novika; Riska Ahsanunnisa; Dwi Fitri Yani
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 1 (2021): April 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i1.2117

Abstract

Inflammation is a cell breakdown caused by bacteria, chemical substances, mechanical trauma and physical trauma. Testing of such anti-inflammatory activity can be done in-vitro with the method of protein denaturation using natural materials starfruit leaf (Averrhoa Oxalidaceae L.). This research aims to determine the comparison of the activity of ethanol extract in the strafruit leaf and sodium diclofenac. strafruit Leaf Ethanol extract is made with a concentration of 1 ppm, 10 ppm and 100 ppm with the comparator of sodium diclofenac. Antiinflammatory resistance is obtained by calculating the percentage of inhibition of protein denaturation. The result of a test of strafruit leaf ethanol extract (Averrhoa Oxalidaceae L.) with a value of IC50 of 20.20 μg/mL indicates an inhibitory percentage of more than 20% at the lowest concentration of 1 ppm, while IC50 sodium diclofenac of 14.93 μg/mL with an inhibitory percentage of more than 20% at 5 ppm .
Efektivitas Ekstrak Daun Matoa (Pometia pinnata) sebagai Antibakteri Staphylococcus epidermidis Rossalinda Rossalinda; Fitria Wijayanti; Damayanti Iskandar
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 1 (2021): April 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i1.2133

Abstract

A natural alternative that can be used to inhibit the growth of Staphylococcus epidermidis bacteria is matoa leaves (Pometia pinnata). Matoa leaves contain secondary metabolites such as flavonoids, tanins, and saponins which are known as an antibacterial. The purpose of this study was to determine the effectiveness of matoa leaves extract as an antibacterial agent for Staphylococcus epidermidis. This study used the disc diffusion method, using deodorant as a positive control, aquadest as a negative control and concentration variations matoa leaves extract of 15%, 20%, 25% and 30%. The matoa leaves were extracted using the maceration method with 96% ethanol. Antibacterial testing in this study was characterized by a clear zone or zone of inhibition around the disc paper. The results of the antibacterial test in this study have to different inhibition zones, that is a sample concentration of 15% the inhibition zone value is 0,125 mm. The sample concentration of 20% the inhibition zone is 3 mm. The sample concentration of 25% the inhibition zone is 2,312 mm and the sample concentrasion of 30% the inhibition zone is 0,875 mm. The extract of matoa leaves can be used as an antibacterial, because according to Pan Chen Wu Tang and zao (2009) the extract of matoa leaves could be applied as inhibitor of the growth of Staphylococcus epidermidis at a sample concentration of 20% is in the weak to moderate category
Efficiency of Zinc (II) Metal Ion Adsorption Using Fe3O4/Clay Composites from Bangka Ayu Ratna Sari; Verry Andre Fabiani; Nurhadini Nurhadini
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 1 (2021): April 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i1.2230

Abstract

Research on the adsorption efficiency of Zn2+ metal ions has been carried out using a composite Fe3O4-clay from Bangka. This study aims to determine the characteristics of Fe3O4-clay composites using FTIR and XRD, determine the adsorption efficiency of Zn2+ metal ions by activated natural clay, Fe3O4, and Fe3O4-clay composites (1:1, 1:2 and 1:3) and determine the effect of concentration. on the adsorption efficiency of Zn2+ metal ions by the Fe3O4-clay composite. The results of FTIR and XRD analysis showed that the Fe3O4-clay composite was successfully synthesized. Based on the results of characterization by FTIR on Fe3O4-clay, it shows the formation of composites with the absorption peak at wave numbers 3685 cm-1 and 683,89 cm-1 which were absorption peaks of clay and at wave number 3448,32 cm-1 is the absorption peak. This absorption peak allowed to bind with clay. In addition, the XRD analysis results of Fe3O4-clay composite showed a diffraction peak at 2θ = 12,23o; 20,83o; 24,83o; 26,6o; 30,48o; 35,625o and 62,5o which consist of clay and Fe3O4. The adsorption efficiency of activated natural clay, Fe3O4, Fe3O4-clay (1:1, 1:2 and 1:3) could absorb Zn2+ metal ions, respectively 99,18%, 44,76%, 99,25%, 94,63% and 76,25%, with the highest adsorption efficiency found in the Fe3O4-clay composite (1:1). The adsorption efficiency of Zn2+ metal ions by the Fe3O4-clay (1:1) composite reached 49,57% at a Zn2+ metal ion concentration of 20 mg/L.

Page 2 of 8 | Total Record : 74

 1   2   3   4   5 

Filter by Year

2019 2025


Reset
Filter By Issues
All Issue Vol 7 No 1 (2025): April 2025 Vol 6 No 2 (2024): October 2024 Vol 6 No 1 (2024): April 2024 Vol 5 No 2 (2023): Oktober 2023 Vol 5 No 1 (2023): April 2023 Vol 4 No 2 (2022): Oktober 2022 Vol 4 No 1 (2022): April 2022 Vol 3 No 2 (2021): Oktober 2021 Vol 3 No 1 (2021): April 2021 Vol 2 No 2 (2020): Oktober 2020 Vol 2 No 1 (2020): April Vol 1 No 1 (2019): Oktober More Issue