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All Journal Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Jurnal SOLMA Eksakta : Berkala Ilmiah Bidang MIPA Sainstek : Jurnal Sains dan Teknologi Indonesian Journal of Chemical Science and Technology Jurnal Wawasan Pendidikan
Zubir, Moondra
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

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Adsorption of Heavy Metal Cu(II) in Wastewater Using Adsorbents from Empty Oil Palm Bunches Fitri, Indah; Nasution, Hafni Indriati; Jasmidi, Jasmidi; Zubir, Moondra; Rahmah, Siti; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62304

Abstract

Heavy metal pollution has increased with increasing industrialization. To overcome this contamination, carried out by using the adsorption method. The adsorbents used are activated carbon and porous polymer composite carbon Cu(TAC). in liquid waste, one of which is Cu metal. This is evidenced by the existence of data showing the efficiency of activated carbon and porous polymer composite carbon Cu(TAC) above 90%. In addition, activated carbon and porous polymer composite carbon Cu(TAC) have an adsorption isotherm equation that is suitable for Cu(II) adsorption is the Langmuir isotherm with linear regression values of 0.9045 and 0.8912.
Synthesis of Cu-(TAC) Composite with Oil Palm Empty Fruit Bunch Waste Activated Carbon Through the Adsorption Mechanism of βCarotene Sari, Lidia Mutia; Jasmidi, Jasmidi; Nasution, Hafni Indriati; Zubir, Moondra; Rahmah, Siti; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62305

Abstract

This study aims to determine the adsorption and desorption abilities of activated carbon and Cu-(TAC) composites in the β-carotene adsorption process on Crude Palm Oil (CPO). Oil Palm Empty Fruit Bunches (EFB) are used as activated carbon and modified with MOFs Cu-(TAC). Activated carbon and Cu-(TAC) composites were characterized by XRD, SEM-EDX, and BET. The concentration of β-carotene absorbed during the adsorption process was analyzed using a UV-Vis spectrophotometer. The variations used to determine the optimum conditions for absorption of β-carotene were the mass variation of the adsorbent and the variation in the contact time between the adsorbent and adsorbate. The results of the characterization of activated carbon showed a sharp absorption in the presence of O-H, C-H and C-O groups indicating the presence of cellulose. Activated carbon is amorphous and the Cu-(TAC) composite has a crystal structure and its pore size is mesoporous. The optimum conditions for the use of activated carbon for β-carotene adsorption were the mass variation of 8 grams with 0.495 ppm of β-carotene and contact time at 120 minutes with 2.605 ppm of β-carotene. The optimum condition of the Cu-(TAC) composite in the β-carotene adsorption process was at 4 gram mass variation with 1.026 ppm β-carotene content and optimum contact time at 60 minutes with 6.384 ppm β-carotene content. The ability of desorption can be seen from the percentage of desorption showing activated carbon in the 150th minute with 96.252% while in the Cu-(TAC) composite in the 30th minute with 88.188%.
Synthesis and Characterization of Activated Carbon/Alginate-Cu Composites Sari, Maya Novita; Muchtar, Zainuddin; Jasmidi, Jasmidi; Rahmah, Siti; Pulungan, Ahmad Shafwan; Zubir, Moondra; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62306

Abstract

OPEFB is one source of natural fiber-based composites which have the potential to become activated carbon. This study aims to synthesize and characterize the activated carbon/alginate -Cu composite. The characterization used in this study is FTIR. The results of this study The synthesis of activated carbon/alginate -Cu composites began with a process of carbonization and activation with H3PO4 to produce Activated Carbon. Alginate using commercial alginate. Furthermore, the three ingredients were mixed until homogeneous and put into a 0.1M CuSO4 solution to produce beads. The characterization of FTIR characterization on the activated carbon/alginate-Cu composite contained the functional group OH group, triple C bond from stretching alkyne, C=C aromatic group, C-H alkane group, C-O group , the P=O stretching vibration of the P-O-C group and the alcohol OH group expressing the active carbon; there are functional groups of hydroxyl (OH), carboxyl, carbonyl, and C-O-C and “COOH bonds which represent alginate and there are OH functional groups, stretching C-H bonds, C-O stretching, stretching C-C. The KALg Cu13 sample had a peak at a wavelength of 2838.79 Cm-1 Where the four samples show the presence of C≡N groups
Synthesis And Characterization of Activated Carbon/Alginate/Nanocellulose-Fe Composite as Slow Release Fertilizer Cahyati, Riska; Syahirah, Atikah nur; Rahmah, Siti; Muchtar, Zainuddin; Jasmidi, Jasmidi; Pulungan, Ahmad Shafwan; Zubir, Moondra; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62307

Abstract

Fe deficiency in plants results in yellowing of leaves on plants and also reduces the quality of fruit produced. Fe deficiency in plants can be treated by applying slow release fertilizer which will release the nutrients in the fertilizer slowly according to plant needs so that there will be no problem of deficiency or excess of Fe. Activated Carbon/Alginate/Nanocellulose-Fe Composite can be used as slow release fertilizer because this composite releases Fe slowly with citric acid medium and tested with AAS. The functional groups in the Activated Carbon/Alginate/Nanocellulose-Fe Composite showed no disappearance of the functional groups belonging to activated carbon, alginate or nanocellulose so that it can be said that these three components were successfully made into composites and can be carriers of nutrients in micro-fertilizers.
Adsorption of Soluble Ammoniac Using A Porous Polymer Composite Cu-(TAC) And Activated Carbon Empty Fruit Palm Oil Maulina, Rissah; Selly, Rini; Nasution, Hafni Indriati; Jasmidi, Jasmidi; Zubir, Moondra; Rahmah, Siti; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 6 No. 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62308

Abstract

This study aims to determine the stages in the process of making activated carbon, synthesis of porous polymer composites Cu(TAC) and activated carbon composites (KA-Cu(TAC) for adsorption of dissolved ammonia (NH4OH). To know the characterization results of activated carbon and KA- Cu(TAC), as well as knowing the optimum mass, concentration, and contact time of activated carbon KA-Cu(TAC) for the adsorption of dissolved ammonia. The research stages started from Empty Oil Palm Bunches (EFB) used as biosorbents for carbon production at 500oC. The resulting product was activated with H3PO4, then modified with porous polymer Cu(TAC) to make a composite. The KA-Cu(TAC) composite was synthesized by reflux method. Then MOFs, activated carbon and KACu(TAC) composite were characterized by BET. The BET characterization results showed that the successfully synthesized KA-Cu(TAC) composite experienced an increase in surface area.In the NH4OH adsorption process the optimum mass efficiency on activated carbon still increased at 8 grams while the KA-Cu(TAC) composite obtained an efficiency of 36, 6% and optimally at a mass of 4 g. At variations in concentration, the efficiency of the two samples still decreased. And the optimum time efficiency obtained in the NH4OH adsorption process with activated carbon was 70% and the KA-Cu(TAC) composite was 86.6%, both samples were equally optimal at 75 minutes.
Isolation and Characterization of Hemicellulose from Empty Oil Palm Fruit Bunches Miswanda, Dikki; Savika, Anggraini; Syafirna, Nada; Sitompul, Maysaro; Selly, r; Zubir, Moondra
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 7 No. 2 (2024): JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i2.63247

Abstract

Isolation and characterization of hemicellulose from empty oil palm bunches have been carried out. The method used in the isolation is alkali extraction with NaOH solvent. Hemicellulose isolated from empty oil palm bunches was analyzed by organoleptic and solubility tests. Functional group analysis was carried out using FTIR, and morphology was performed using SEM. The highest yield of 12.84% was obtained from the variation of 0.5 N NaOH solvent. Organoleptic and solubility tests showed that the characteristics of hemicellulose isolated from empty oil palm bunches were by the characteristics of hemicellulose in general. The FTIR results of hemicellulose showed the specific absorption peaks of OH stretching, C-H stretching, C=O bending, C-OH bending, and C-C stretching. SEM photos show the rough and fibrous shape of the hemicellulose powder surface.
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.
Temperature Influence on Chemical Reaction Rates and Gas Formation Wardana, Dian; Ramadhan , Dwi Sapri; Fahmi, Jaman; Safitri, Wulan Dwi; Everyanti, Ida Cathy; Silalahi, Sarina Septiani; 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.v8i2.70584

Abstract

Reaction rate is fundamentally defined as the change in the concentration of reactants or products perunit time, and is known to be influenced by several determinants, including surface area, temperature,catalysts, and reactant molarity or concentration. The present study specifically investigates the validityof the widely accepted principle that temperature plays a significant role in modulating reaction rates.Experimental variations were introduced, both in terms of temperature levels and the types of chemicalmixtures employed. The findings confirm that temperature indeed accelerates gas generation across alltested reaction systems. However, in mixtures exhibiting higher viscosity, gas formation proceeds moreslowly due to reduced molecular mobility. Consequently, in the softener–baking soda system, the onsetand progression of gas evolution show noticeable differences compared to less viscous mixtures.
Creative Ice Cream Experiment Using the Freezing Point Depression Principle Safitri, Wulan Dwi; Wardana, Dian; Ramadhan, Dwi Sapri; Fahmi, Jaman; Zubir, Moondra; Siregar, Koriatul Jannah; Purba, Sunita Karin; 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.v8i2.70585

Abstract

This research aims to explore creative approaches in ice cream production by utilizing the effect of freezing point depression. Through these experiments, we employed various additives that influence the physical properties of ice cream, resulting in a final product that is softer, creamier, and able to maintain optimal texture at different temperatures. The experimental method involved varying the types of additives combined with the base ice cream mixture. The measured parameters included freezing point depression, texture, and softness of the produced ice cream. The collected data were analyzed to determine how each additive affected the physicochemical characteristics of the product. The results showed that differences in sugar content among the ingredients significantly influenced the degree of freezing point depression in the ice cream.
Effect of Electrode Type and Current Strength on the Mass of Substance Reduced at the Cathode in the Electrolysis Process Fahmi, Jam'an; Ramadhan, Dwi Sapri; Wardana, Dian; Safitri, Wulan Dwi; Zubir, Moondra; Siregar, Nurdin; Manullang, Riska Greselia; Sagala, Novitri Yolanda; Br Sipahutar, Desy Meriani
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.v8i2.70607

Abstract

This study investigates the effect of electrode type and current strength on the mass of hydrogen gas produced at the cathode during the electrolysis of sodium chloride solution. A simulation based on Faraday’s law was conducted using three electrode materials—carbon, copper, and zinc—under controlled current settings of 0.10 A, 0.20 A, and 0.30 A for a fixed electrolysis duration of 30 minutes. Current efficiency values were assigned to each electrode to model realistic performance differences, with copper exhibiting the highest efficiency, followed by zinc and carbon. The results show that increasing the current leads to a linear rise in the mass of hydrogen produced for all electrode types, confirming the proportional relationship between electric charge and cathodic reduction predicted by Faraday’s law. Additionally, copper electrodes produced the highest hydrogen yield at all current levels, while carbon generated the lowest, indicating that electrode characteristics influence electrochemical efficiency. Overall, the findings demonstrate that current strength is the dominant factor determining the mass of reduced species at the cathode, whereas electrode material provides a secondary yet significant contribution to electrolysis effectiveness.
Co-Authors AA Sudharmawan, AA Abd Hakim, Abd Agus, Junaidi ALEXCANDRA, HISAR Arayan, Miftah Arwadi Sinuraya Aulia, Amanda Aulia, Shelly Ayu Andini ayumi, Sheilla Maliza Azizah, Rifka Noor Azzahra, Nabila Batubara, Diva Angelica Amanda Br Manik, Trivena Myta Br Nadeak, Stephani Bintang N. Br Napitupuli, Monika Shinta Kasih Br Sebanyang, Resi Mai Linda Etaminta Br Sipahutar, Desy Meriani Cahyati, Riska Damanik, Angelica Damanik, Wicha Rosari Dikki Miswanda Dion Awfa Everyanti, Ida Cathy Fahmi, Jam'an Fahmi, Jaman Faradilla, Putri Fitri, Indah Hamasaki, Atom Husna, Wiki Nadia Intan Juwita, Intan Jannah, Nazria Marwatul Jasmidi Jasmidi Jasmidi Kabul, Abdul Hamid Khairahma Khairahmi Khairunisa, Dira Limbong, Julian Lubis, Aulia Madjid Lubis, Ghania Dhia Ulhaq Lumbantoruan, Sifra H.R Manalu, Anrian Haholongan Manullang, Okto Panca Manullang, Riska Greselia Maulina, Rissah Mendrofa, Bulan Susanti Muhammad Ashari Muhammad Luthfi Mustaqiman, Aulia Nur Nainggolan, Lidya Revalina Nasution, Dhea Ananda Nasution, Hafni Indriati Ningsih, Liska Kustria Novrizaldi Wardana Nurdin Siregar Ozeki, Sumio Panjaitan, Teguh Hidayat Prayogo, Wisnu Puandra, Esti Miska Pulungan, Ahmad Shafwan purba, Gracia Purba, Nesya Maharani Purba, Sunita Karin Putra, Adhitya Shahrian Rahmadyani, Zaskia Rahmaniar Rahmaniar, Rahmaniar Ramadhan , Dwi Sapri Ramadhan, Dwi Sapri Riga, Riga Rini Selly, Rini S, Abd Hakim Safitri, Wulan Dwi Sagala, Novitri Yolanda Sari, Lidia Mutia Sari, Maya Novita Sari, Trisna Kumala Savika, Anggraini Selly, r Sembiring, Rahel Natalia Sembiring, Rinawati Siahaan, Stephani Yunita Sigalingging, Olivia Gina Ananta Sihotang, Pelita Silalahi, Sarina Septiani Simamora, Astuty Evalina Simamora, Elisabeth Siregar, Ida Cathy Everyanti Siregar, Koriatul Jannah Sitompul, Maysaro Suprapto Suprapto Syafirna, Nada Syahirah, Atikah Nur Tambunan, Ida Mariati Tanjung, Amar Lohot Wardana, Dian Yusfiani, Marnida Zainuddin Muchtar