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All Journal PROSIDING SEMINAR KIMIA Indonesian Journal of Chemical Science and Technology Educenter: Jurnal Ilmiah Pendidikan EDUCENTER JURNAL PENDIDIKAN
Moondra Zubir
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Health Professions Materials Science & Nanotechnology

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Characterization of Chitosan-Bentonite and Water Hyacinth Plant as a Potential Adsorbent Moondra Zubir; Hafni Indriati Nasution; Mutya Fika Safitri; Agustina Mandasari
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.16318

Abstract

Water hyacinth (Eichhornia crassipes) has a very rapid growth in the waters so it can cause eutrophication. The silica content of 5.56% allows water hyacinth can be utilized as a natural adsorbent. Bentonit has an advantage as an adsorbent because it has an inter-layered structure that can be easily modified with chitosan, resulting in better performance as an eco-friendly adsorbent. This research aims to determine the characterization of chitosan-bentonite and water hyacinth as a adsorbent of Pb(II)removal. Characterization tests were performed using X-ray difraction (XRD) and Fourier Transform Infra Red (FTIR) spectrophotometry. From the results of quantitative XRD analysis can be seen that the adsorbent of chitosan-bentonit and water hyacinth have different adsorbent characteristic, but has the same crystal system that is triclinic crystal system.
Metal Organic Frameworks of CPL-4 and CPL-5 Synthesis and Characterization under Magnetic Fields Moondra Zubir; Hafni Indriati Nasution; Minda Shafina Syafei
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 1 (2019): January 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i1.16319

Abstract

CPL-4 and CPL-5 were synthesized with used 2,3 pyrazine dicarboxylic acid as main ligand , 4,4’-azopyridine(Apy) as linker ligand for CPL-4 and 1,2-di-(4-pyridil)ethylene(Bpe) for CPL-5 in water-ethanol(1:1) and temperature 250C. Three methods used in various reaction time and dropping method to metal ion with no stir treatment and also stirring or shaking treatment. CPL-4 have no magnetic field effect shows same XRD pattern in all synthesis method. Otherwise, CPL-5 with used method#03 shows different XRD pattern in 0T and 6T. By changing concentration of Cu2+ to 0.02 M, 6T crystal also shown different XRD pattern if compared with 6T crystal with 2 hours to 1 hours reaction time. It indicate of changing reaction between Hpzdc and Bpe with metal ion or reactivity both of ligand with metal ion induce different route under 6T. This process may effect to new crystal structure during synthesis in 6T..
Pb(II) and Oil Contamination Analysis of Belawan Sea, Medan City, North Sumatera Lili Nur Indah Sari Tarigan; Nurul Qodri; Septi Lumongga Duma rangkuti; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.16321

Abstract

Belawan waters are very densely populated with shipping, industrial and settlement. These various activities have an impact in the form of sea pollution by liquid waste such as Pb (II) and oil. Based on the results of the analysis of the content of Pb (II) in the highest waters, which is equal to 26.9120 ppm, it exceeds the threshold. The oil content in the waters has exceeded the threshold of 0.05 gr / L. One way to reduce the levels of Pb (II) and oil is by using coconut husk biosorbent. This is evidenced by the results of the analysis that there was a decrease in Pb (II) metal content after adsorption using coconut coir biosorbent which was equal to 6.2430ppm with adsorption capability of 20,699 ppm. The oil content in the water after the water is adsorbed using coconut coir biosorbent shows the Not Applicable result because the seawater sample has been homogenized so that no significant changes occur. This shows that coconut coir biosorbent is effective to reduce the content of Pb and Oil in water in the waters of the sea.
PENGEMBANGAN E-MODUL TITRASI ASAM BASA BERBASIS BLENDED LEARNING DENGAN APLIKASI KVISOFT FLIPBOOK MAKER Nurhayani Nurhayani; Ramlan Silaban; Moondra Zubir
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

This study aims to determine the expert team's assessment of acid-base titration e-module based on blended learning with the kvisoft flipbook maker application by BSNP (Badan Standar Nasional Pendidikan). The research type used is research and development modified from development ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. This research is only used until product validation. The data sources in this research were 2 expert validators. The results showed that the expert team's assessment of the acid-base titration e-module based blended learning with the kvisoft flipbook maker application by BSNP on the aspect content feasibility had an average percentage value of 86%, language feasibility of 88%, and presentation feasibility analysis of 85% and concluded that the media was very feasible to use and didn’t need to be revised. Keywords: E-module, acid-base titration, blended learning, kvisoft flipbook maker
Perbedaan hasil belajar dan motivasi belajar siswa dengan menggunakan model PBL dan pembelajaran konvensional berbantuan media iSpring pada materi laju reaksi Aritonang, Hengki Wijaya; Moondra Zubir
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 8 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i8.107

Abstract

This study aims to determine whether there is a significant difference in student learning outcomes and student learning motivation who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media on the rate material at PAB 8 Saentis Private High School. The research population was all students of class XI SMA Private PAB 8 Saentis. The sample consisted of class XI students of SMA Swasta PAB 8 Saentis, which consisted of 2 classes, namely the experimental class (XI IPA 2) with the PBL model and the control class (XI IPA 3) with the conventional model. The instruments used are test and non-test instruments. The student learning outcomes data were first tested for normality and homogeneity, where the results obtained by the two samples were normally distributed and homogeneous. Hypothesis testing was carried out using the independent sample t-test, the results of this study showed that in hypothesis 1, a sig value of 0.001 was produced at a significance level of 5% (α= 0.05). if the value of sig < then Ho is rejected. Thus , it shows that there are differences in student learning outcomes who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media . while hypothesis 2 obtained a sig value of 0.04 indicating differences in student learning motivation and hypothesis 3 obtained a sig value of 0.035 indicating a correlation between motivation and student learning outcomes who were taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media.
The Effect of Acids, Bases and Salts in Removing Rust Using the Electrolysis Method Kurniawan, Ekin Dwi Arif; Moondra Zubir; Alfira Julian Pratiwi; Rafidah Almira Samosir; Mutia Ardila; Agnes Aprilyani Br Silitonga; Anna Sakila; Dindy Louiza Pangaribuan; Geby Mai Irawan; Okta Miranda Samosir; Vivy Cintia Laudia Hutagaol
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.v8i2.68718

Abstract

Corrosion is a natural process of metal deterioration caused by chemical or electrochemical reactions with the surrounding environment, and it commonly occurs in iron and steel. This study examined the use of electrolysis as a simple method to reduce rust on iron surfaces by applying several electrolyte solutions. The solutions tested included sodium chloride, citric acid, acetic acid, sodium bicarbonate, and water, each at a concentration of 10%, while citric acid was also varied up to 100%. Electrolysis was performed for 10 to 30 minutes on both positive and negative poles. The findings showed that sodium chloride solution gave the highest effectiveness in rust removal, with 0.93% rust loss on the negative pole and 0.58% on the positive pole. Increasing solution concentration and treatment time further improved the rust removal rate, reaching 2.50% at 30 minutes.
Electrical Properties of Tropical Fruit Extracts: Effects of EM4 Fermentation and Thermal Processing Safitri, Wulan Dwi; Wardana, Dian; Ramadhan, Dwi Sapri; Fahmi, Jaman; Shallomita, Grace; Putri Ayunicha; Irma Syahputri; Siregar, Nuraini; Ahmad Nasir Pulungan; Moondra Zubir
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.v8i2.68720

Abstract

This study examines the electrical properties of fermented pineapple and lime extracts subjected to Effective Microorganism 4 (EM4) fermentation and thermal treatment at varying temperatures. The fermentation process was conducted over a period of six days, with temperature conditions set at 30°C and 70°C. The results indicate that the lime extract generated higher voltage and current outputs compared to the pineapple extract, particularly on the sixth day of fermentation. Furthermore, the thermal treatment revealed a more pronounced electrical response in lime extract, as evidenced by a greater increase in current at elevated temperatures. These findings suggest that lime extract, when combined with EM4 fermentation and optimal thermal conditions, exhibits greater potential for application in alternative bioelectric energy generation.
Effect of Sugar, Salt, and Flavorings Addition on Temperature Changes and Specific Heat Capacity in Citric Acid, Acetic Acid, and Ascorbic Acid Solutions Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Rafidah Almira Samosir; Mutia Ardila; Gioni Thesia Boru Simbolon; Afrilia Tria Ivanka; Muhammad Fadhli; Tetra Tasya Anggraini Butar; Eren Nazura; Moondra Zubir; Abd Hakim S
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.v8i2.68735

Abstract

This study aims to evaluate the effect of the addition of additives in the form of sugar, salt, and flavorings on changes in temperature and type heat capacity in citric acid, acetic acid, and ascorbic acid solutions. The methodology used is a quantitative experimental approach with direct observation of temperature changes as well as calculation of enthalpy changes (ΔH) in various combinations of acidic and additive solutions. The results of the analysis showed that the types of additives exerted different effects on the thermal stability and heat capacity of each acidic solution. Sugars tend to provide the most optimal thermal stability with minimal fluctuations in ΔH change, while salts cause the greatest fluctuations. Flavorings show a more varied and inconsistent pattern of change. These findings provide in-depth insights into the thermal characteristics of organic acid solutions with additive modification, contributing to the development of applications in the fields of food, pharmaceutical, and applied chemistry education.
Influence of Cooking Temperature on the Moisture Content and Organoleptic Properties of Pineapple, Banana, and Dragon Fruit Jam Mutia Ardila; Rafidah Almira Samosir; Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Najwa Putri L. Nasution; Gresvita Sanova Turnip; Sari Mawaddah; Faizah A. Nasution; Feri P. Jahata Samosir; Moondra Zubir; Abd Hakim S
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.v8i2.68736

Abstract

Jam is a processed fruit product with high density and acidity, making it more stable than other fruit-based products. The jam-making process includes crushing the fruit, adding sugar, acid, thickening agents, and applying heat. Cooking temperature plays a critical role in determining the moisture content, texture, aroma, and taste of jam. This study investigates the influence of cooking temperature on the moisture content and organoleptic properties of pineapple (Ananas comosus), banana (Musa paradisiaca), and dragon fruit (Hylocereus spp.) jams. The jams were prepared by heating at various temperatures (900C, 1000C, 1100C), followed by moisture content measurement and organoleptic testing. Results showed that higher temperatures significantly reduced moisture content and enhanced sensory quality. Jams cooked at 110°C had the lowest moisture levels and the best organoleptic scores. These findings highlight the importance of temperature control in producing high-quality jam.
Influence of Temperature and Stirring Duration on the Solubility Kinetics of Palm Sugar (Arenga Pinnata) in Water: Implications for Food Processing Efficiency Rafidah Almira Samosir; Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Mutia Ardila; Trimutia Wulandari; Flia Arnesta Sipayung; Dira Rahma Cahya; Nove Briani Minar Sihombing; Einstenia Sirait; Moondra Zubir; Abd Hakim S
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.v8i2.68737

Abstract

Palm sugar (Arenga pinnata) is widely used in traditional and industrial food processing, where its solubility plays a crucial role in determining product consistency and efficiency. However, most previous studies have focused on the solubility of refined cane sugar, leaving limited understanding of how temperature and stirring conditions affect the dissolution behavior of palm sugar, which has a more complex composition. This study aims to examine the effect of temperature, solute mass, and stirring duration on the solubility of palm sugar in water. A laboratory-based experimental method was employed, varying temperature (50°C, 75°C, 100°C), sugar mass (20 g and 40 g), and stirring duration (1 and 2 minutes). In general, the findings indicate that higher temperature accelerates the dissolution rate, while greater solute mass extends dissolution time. These results confirm temperature as the dominant factor influencing dissolution kinetics. The implications of this study include improving household practices for faster sugar preparation, optimizing processing efficiency in small-scale food industries, and contributing to food science education by providing an applied example of solubility principles.
Co-Authors Abd Hakim S Ade Prisma Sitepu Afrilia Tria Ivanka Agnes Aprilyani Br Silitonga Agustina Mandasari Ahmad Nasir Pulungan Amanda Revalona Sitepu Amelia Rahmadhani Anggi Nurhasanah Siregar Ani Sutiani Anisa Ramadhani Anna Sakila Aritonang, Hengki Wijaya Assyifa’u Qolbiatu Atthoyibah Awy Silaban Ayyu Rizkia Nasution Banu Nursanni Caecilia Antonia Purba Chyntya Angelina PN Cynthia Crasela Siregar Dea Clara May Christin Sijabat Desika Devani Br Surbakti Dewi Pratiwi Dhea Syah Nazwa Nasution Dian Finensia Saragih Dika Fahreza Dimas Ridho Dinda Dwi Hasanah Dindy Louiza Pangaribuan Dira Rahma Cahya Dita Indah Lorencia Silitonga Einstenia Sirait Eren Nazura Fahmi, Jaman Fairuz, Tariza Faizah A. Nasution Feri P. Jahata Samosir Flia Arnesta Sipayung Frengky Sanjaya Ginting Geby Mai Irawan Gioni Thesia Boru Simbolon Gita Dwi Ayu Ninzy Tampubolon Gracia Tri Putri Br Ginting Gresvita Sanova Turnip Hafni Indriati Nasution Hanifa Azzahra Iis Siti Jahro Irma Syahputri Ivan Fadillah Jasmidi Jenny Lasria Florita Br.Tampubolon Kurniawan, Ekin Dwi Arif Lili Nur Indah Sari Tarigan Lisna Sevta Siburian Lisnawaty Simatupang Lisnwaty Simatupang M. Rizky Fauzan Tampubolon Maria Yovinta Silitonga Marnida Yusfiani Minda Shafina Syafei Muhammad Ali Athiya Zahran Muhammad Fadhli Muhammad Fisal Mutia Ardila Mutya Fika Safitri Nadia Mubarokah Nadia Priska Nailatul Fauzah Ritonga Najwa Putri L. Nasution Najwa Shauqiyah Nove Briani Minar Sihombing Nurhayani Nurhayani Nurul Qodri Okta Miranda Samosir Pratiwi, Alfira Julian Putri Ayunicha Putri Faradilla Putri Rahmayani Rabiah Afifah Daulay Ramadhan, Dwi Sapri Ramlan Silaban Raudatul Fadilla Rini Selly Safitri, Wulan Dwi Samosir, Rafidah Almira Sari Mawaddah Septi Lumongga Duma rangkuti Shallomita, Grace Siregar, Nuraini Siti Khailafizah Sofia Ramadhani Sophia Gloria Bakara SRI RAHAYU Suci Trianata Situmorang Syafrina Letare Lubis Tania Evelin Tesa Juliana Br.Samosir Tetra Tasya Anggraini Butar Therecia Fricillia Ginting Trimutia Wulandari Trivena Myta Br. Manik Ummi Kalsum Vindy Yosensi Saragih Vivy Cintia Laudia Hutagaol Wardana, Dian Wella Apriwidyanti Winda Silalahi Yunita Dwi Utami