cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Moondra Zubir
Contact Email
moondrazubir@unimed.ac.id
Phone
-
Journal Mail Official
ijcst.kimia.unimed@gmail.com
Editorial Address
Chemistry Department , State University of Medan Jl. Willem Iskandar Pasar V, Medan Estate Medan, Indonesia
Location
Kota medan,
Sumatera utara
INDONESIA
Indonesian Journal of Chemical Science and Technology
Published by Universitas Negeri Medan
ISSN : 26221349     EISSN : 26224968     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal ini mempublikasikan artikel di bidang Kimia yang meliputi penelitian dasar dan terapan. Bentuk Publikasi di Indonesian Journal of Chemical Science and Technology : * Artikel * Review (berdasarkan permintaan Dewan Redaksi) * Communication (berdasarkan permintaan Dewan Redaksi)
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 237 Documents
 20   21   22   23   24 
Potential of Bituminous Coal to Become Nanocarbon Using the Hydrothermal Method Muhammad Abdul Halim; Indra Surya
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68673

Abstract

This research investigates the potential of bituminous coal from Sawahlunto, Indonesia, as a raw material for nanocarbon synthesis using a hydrothermal method. The study aims to enhance the economic value of coal by exploring its transformation into nanocarbon. The process involves stages of preparation, carbonization, and hydrothermal at varying temperatures (120°C, 150°C, and 180°C) durations (2 and 4 hours). Fourier Transform Infrared (FT-IR) spectroscopy, X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) were employed to characterize the resulting nanocarbon. The hydrothermal process improved the crystallinity of coal from 51% to 57% and reduced its particle size to 47.71 nm. SEM and TEM analyses revealed a more uniform and refined morphology in the nanocarbon compared to raw coal. The study underscores the effectiveness of the hydrothermal method in optimizing the physical and structural properties of coal-derived nanocarbon, paving the way for its potential application in various industries.
Chemical Effectiveness of a Natural Deodorant Spray Formulated with Basil Leaf Extract and Lemon Extract as Antibacterial Agents Nadia Mubarokah; Anisa Ramadhani; Assyifa’u Qolbiatu Atthoyibah; Dea Clara May Christin Sijabat; Gracia Tri Putri Br Ginting; Ivan Fadillah; Lisnawaty Simatupang; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68674

Abstract

This study focuses on the development of a natural deodorant spray to address body odor caused by bacterial activity in sweat. The formulation utilizes alum, basil leaf extract, and lemon extract, all known for their antibacterial properties. Three formulations were evaluated: F1 (alum and basil extract), F2 (alum and lemon extract), and F3 (a combination of all three). The formulations underwent physical testing, pH analysis, clarity assessment, skin irritation evaluation, and fabric compatibility tests. Results indicated that F1 demonstrated stability in pH and clarity, F2 offered a superior aroma, and F3 exhibited the strongest antibacterial efficacy with a balanced fragrance. All formulations were found to be non-irritating and safe for use. The combination of these natural ingredients demonstrates significant potential for producing eco-friendly and consumer-safe deodorant spray products, highlighting their effectiveness in combating body odor while maintaining user comfort and environmental sustainability.
Comparison between Carboxy Methyl Cellulose and Carbomer as Viscosity Agents on the Physical Stability of Combination Shampoo Preparations of Jackfruit Leaves (Artocarpus heterophyllus) and Pandan Leaves (Pandanus amarillyfolius) Rosaria Ika Pratiwi; Aish Fitriani; Febrilliani
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68675

Abstract

Viscosity agents such as carboxy methyl cellulose (CMC) and carbomer are an important part of shampoo preparations because they function as regulators of the viscosity of the preparation which can affect physical stability. This study analyzes the differences between CMC and carbomer as viscosity agents on the physical stability of a combination shampoo preparation of jackfruit leaves (Artocarpus heterophyllus) and pandan leaves (Pandanus amarillyfolius). The physical stability measured by this shampoo preparation includes the density test, viscosity test, and foam test. There is a difference in specific gravity between shampoos that use the viscosity agent CMC and carbomer in F1, F2, and F3 (P value <0.05), a difference in viscosity in F1 (P value <0.05), and there is no difference in viscosity between the shampoos used. using viscosity agent CMC with carbomer on F2 and F3 (P value >0.05), as well as high foam on F1, F2, and F3 (P value >0.05).
Adsorption and Desorption Properties of Beta-Carotene in Crude Palm Oil (CPO) Using Empty Fruit Bunch-Based Activated Carbon Composite with Metal-Organic Frameworks (MOFs) - Fe(TAC) Yunita Dwi Utami; Trivena Myta Br. Manik; Frengky Sanjaya Ginting; Chyntya Angelina PN; Sri Rahayu; Syafrina Letare Lubis; Jasmidi; Rini Selly; Putri Faradilla; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68676

Abstract

The rapid expansion of oil palm plantations in North Sumatra, from 31,730,961 hectares in 2016 to 41,667,011 hectares in 2018, has resulted in significant solid waste generation, particularly empty fruit bunches (EFB). This study aims to utilize EFB as a precursor for activated carbon production and evaluate its effectiveness in adsorbing beta-carotene from crude palm oil (CPO). EFB was processed through carbonization and activation to create a composite adsorbent KA-Fe(TAC) synthesized with metal-organic frameworks (MOFs). Characterization using X-ray diffraction (XRD) confirmed the crystalline structure of the composite. Results indicated that the optimal adsorption efficiency for activated carbon was 8.925%, while the KA-Fe(TAC) composite achieved 21.645%. The findings suggest that the KA-Fe(TAC) composite significantly enhances beta-carotene adsorption capacity compared to conventional activated carbon. Additionally, the optimal contact time for adsorption was found to be 60 minutes for activated carbon and 150 minutes for the KA-Fe(TAC) composite, indicating improved efficiency over time.
Optimization Of Potassium Extraction Method From Corncob Waste (Zea Mays L.) Using Aquadest Zuhairiah Nasution; Nora Susanti; Predy Fernandes Sihaloho
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68677

Abstract

The purpose of this study was to determine the optimal extraction method of potassium from corn cobs in semibatch and batch. In this research, semibatch maceration is a leaching process used to obtain the time needed for the solvent to absorb alkali in corn cob ash. While the batch system maceration is a leaching process used to obtain the amount of time needed for the solvent to reach saturation point. Data collection techniques in this research are: sample preparation and drying of corn cobs, corn cobs pyrolysis, semibatch and batch maceration of corn cobs ash, and determination of alkali content by titration method. From the results, it can be concluded that corn cobss have the potential to be used as a source of alkali because the potassium (K) content in corn cob ash is 25.78%. The moisture content and yield of corn cob ash were 77.5% and 17%, respectively. The saturated solvent time for semibatch maceration was 3.5 days, while for batch maceration it was 12 days. Where at consecutive ratios of 1 gram/25 mL; 2 grams/25 mL; 3 grams/25 mL; and 4 grams/25 mL each had concentration values that still increased from 0.112 N to 0.9672 N; 0.223 N to 3.2364 N; 0.3348 N to 2.0646 N; and 0.558N to 3.6828 N. The highest alkali yield was obtained at a corn cob ash/solvent ratio of 1 gram/25 mL, which was 20.15%.
Reducing Salt Levels in Sea Water Using Active Carbon Adsorbent from Coconut Shell Charcoal, Silica Sand, and Palm Fiber Ade Prisma Sitepu; Awy Silaban; Hanifa Azzahra; Raudatul Fadilla; Ummi Kalsum; Moondra Zubir; Lisnwaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68678

Abstract

This study aims to evaluate the effectiveness of various combination of adsorbents in reducing salt content in seawater through the adsorption method. Four variations in the ratio of adsorbent materials, namely activated charcoal, silica sand and palm fiber, were tested with different amounts. activated charcoal, silica sand, and palm fiber, were tested with different amounts. Results showed that the 1:2 ratio (800 grams of activated charcoal and 400 grams of silica sand) resulted in a decrease in salt content from 20% to 3%, which was the highest reduction compared to the other comparison. In addition, the pH test showed that the pH value of the water after the adsorption process remained in the neutral range, namely 7 to 7.5, which indicating that the filtration process successfully improved the water quality. This study indicates that the use of local materials such as activated charcoal and silica sand can be an effective and environmentally friendly solution to reduce the effective and environmentally friendly solution to reduce seawater salinity, as well as increase public awareness of the importance of clean water. public awareness of the importance of clean water. These results are expected to contribute to the development of a more affordable and sustainable desalination technology. technology that is more affordable and sustainable.
Effect of Cu and Fe Metals on the Synthesis of Activated Carbon Composites of MOFs Cu(TAC) and Fe(TAC) Anggi Nurhasanah Siregar; Jasmidi; Moondra Zubir; Rini Selly; Putri Faradilla
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68680

Abstract

The research focuses on improving the structure and quality of activated carbon by synthesizing porous polymers or Metal-Organic Frameworks (MOFs). Characterization of AC-Cu(TAC)2 and AC-Fe(TAC)3 is carried out using XRD, SEM, and EDX instruments. Characterization of AC- Cu(TAC)2 and AC-Fe(TAC)2 revealed that the observed XRD pattern is representative of the structure of crystalline materials, with AC-Cu(TAC)2 and AC-Fe(TAC)3 having a crystallinity of 40% with both materials forming a triclinic crystal system. Characterization based on SEM at 200x magnification shows that the fibers are interbonded and attached to the cross-section on AC- Cu(TAC)2 , having a relatively large porosity so that it shows a fairly strong bond between activated carbon and Cu(TAC) MOFs. the size of the fragmented fiber particles in AC-Fe(TAC)3 which is relatively not the same as the smaller porosity. EDX characterization shows that Cu and Fe metals are one of the composite materials.
Combination of Silica (SiO2) Addition from Rice Husk As a Heat-Resistant Coating Material at Wall Paint Dafit Ericson Sihotang; Putri Yanita Sidabutar; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68681

Abstract

The synthesis of silica gel from rice husk ash has been carried out using the sol-gel method, which is mixed into paint as an additive for heat resistance. This research aims to determine the combination of adding SiO2 additive to wall paint as a heat-resistant coating material. The characterization methods used are FTIR, XRD, and SEM. The initial stage of this research involves the synthesis of silica gel from rice husk ash, which is then mixed into 10 mL of paint with varying silica additions of 0.1; 0.2; 0.3; 0.4; and 0.5 grams. After that, it is tested for heat absorption. Based on the FTIR results on silica, silanol (Si-OH) and siloxane (Si-O-Si) groups were observed, and the XRD results indicated that the silica structure produced was amorphous.
Combination of Ni-Silica Metal (Ni/SiO2 ) from Rice Husk as Heat-Resistant Coating Material for Wall Paint Putri Yanita Sidabutar; Dafit Ericson Sihotang; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68683

Abstract

Combination of Silica with Ni to become Ni/SiO2. This study aims to determine the combination of Ni/SiO2 additives to wall paint as a heat-resistant coating material. The characterization used is FTIR and XRD. The initial stage of this study involved the synthesis of nickel silica, after which it was mixed into 10 mL of paint with variations in the addition of nickel silica of 0.1; 0.2; 0.3; 0.4; and 0.5 grams. After that it was tested for heat absorption. Based on the FTIR results on silica, it shows silanol groups (Si-OH) and siloxane groups (Si-O-Si) and the XRD results show that the structure of the resulting silica is amorphous. variations in the mixture of these materials affect the specific heat of the coating. The more Ni/SiO2 that is mixed, the smaller the specific heat will be. This indicates that the coating does not absorb heat but reflects heat.
Growth Response of Mung Bean Plants Vigna radiata L. and Spinach Amaranthus hybridus L. Under Acidic and Alkaline Conditions Ramadhan, Dwi Sapri; Wardana, Dian; Fahmi, Jaman; Safitri, Wulan Dwi; Lubis, Ghania Dhia Ulhaq; Nainggolan, Lidya Revalina; Zubir, Moondra; Siregar, Nurdin
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.70583

Abstract

This study investigates the growth response of mung bean Vigna radiata L. and spinach Amaranthus hybridus L. under controlled acidic neutral and alkaline environments across a wide pH gradient from pH 3 to pH 14. The work provides a comparative assessment of two species with distinct physiological characteristics to clarify how hydrogen ion concentration shapes vegetative development. The novelty of this study lies in its direct evaluation of extreme pH conditions using a uniform experimental design that allows both species to be examined under identical chemical exposure, enabling a clear contrast of tolerance thresholds. Plant height was recorded daily for 13 days to capture early stage vegetative dynamics. Both species exhibited their highest stability near pH 7 while severe deviations from neutrality reduced growth through nutrient imbalance and physiological stress. Mung bean showed moderate tolerance at pH 9.5 whereas spinach displayed enhanced performance within mild alkalinity. Strong acidity and strong alkalinity produced structural damage in both species. The findings highlight the critical role of soil pH in plant performance and provide foundational insight into species specific tolerance ranges that can support more informed management of crops grown in chemically variable environments.

Page 23 of 24 | Total Record : 237

 20   21   22   23   24 

Filter by Year

2018 2025


Reset
Filter By Issues
All Issue Vol. 8 No. 2 (2025): JULY 2025 Vol. 8 No. 1 (2025): JANUARY 2025 Vol. 7 No. 2 (2024): JULY 2024 Vol 7, No 2 (2024): JULY 2024 Vol 7, No 1 (2024): JANUARY 2024 Vol. 7 No. 1 (2024): JANUARY 2024 Vol 6, No 2 (2023): JULY 2023 Vol. 6 No. 2 (2023): JULY 2023 Vol 6, No 1 (2023): JANUARY 2023 Vol 5, No 2 (2022): JULI 2022 Vol 5, No 1 (2022): JANUARI 2022 Vol 4, No 2 (2021): JULI 2021 Vol 4, No 1 (2021): JANUARY 2021 Vol 3, No 2 (2020): July 2020 Vol 3, No 1 (2020): January 2020 Vol 2, No 2 (2019): July 2019 Vol 2, No 1 (2019): January 2019 Vol 1, No 1 (2018): Juli 2018 More Issue