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Moondra Zubir
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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 179 Documents
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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.
The effect of bound calorific value and burning rate on biobriquettes from salak skin with starch adhesive Alexander, Irving Josafat; Silaban, Ramlan; Sirait, Gloria
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.v7i2.62255

Abstract

Massive technological development is something that cannot be avoided in this life, because technological development is in line with scientific progress. Indonesia is a country that has abundant energy of various kinds source. Currently, energy use in Indonesia still comes from oil and gas earth, as well as coal which is non-renewable resources. Dependence on energy becomes main problem in energy supply national. Considering the need for it fuel every year continues has increased and is necessary anticipation of the availability of energy sources which is getting thinner while the price fuel oil increases. Every country in the world is now focusing on energy production through non-conventional sources. Biomass is an alternative energy source to replace fossil fuels (oil earth) because it has several beneficial properties, including being able to be utilized economically sustainable because of its renewable nature, no contains sulfur so the biomass does not cause air pollution. Besides being able to reduce waste, if managed properly biomass has high potential to be used as an alternative energy source in the form of biobriquettes. The method used in this research includes the preparation of salak skin raw materials, the carbonisation stage of salak skin, the starch adhesive preparation stage and the salak skin analysis stage, namely the analysis of calorific value and burning rate. Based on the results of the calorific value analysis and combustion rate analysis, it can be concluded that the biobriquette sample of salak skin with starch adhesive has met the provisions of the SNI No. 01-6235-2000 on charcoal biobriquettes. From the results of the study, it was also found that the Biobriket B sample, namely by using adhesive, has a high calorific value and burning rate compared to Biobriket A, namely without using adhesive.
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.
Adsorption Properties of Beta Carotene from Activated Carbon Derivatives of Oil Palm Empty Bunches Jasmidi, Jasmidi; Zubir, Moondra; Selly, Rini; Faradilla, Putri; Rahmah, Siti
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.62260

Abstract

This research aims to determine the adsorption ability of activated carbon and Fe-Cu modified activated carbon in the β-carotene adsorption process on Crude Palm Oil (CPO). Empty Palm Oil Bunches (TKKS) are used as a bio-sorbent for carbon production at a temperature of 500 ºC. The synthesized carbon was activated using H3PO4 and modified with Fe-Cu metal. CPO quality parameters such as Free Fatty Acids and Peroxide Number were analyzed to see the effect of adsorption on CPO quality. The β-carotene level in the CPO sample used is 472.1 ppm. The optimum conditions for using activated carbon in the β-carotene adsorption process are a mass variation of 8 grams with the β-carotene remaining after adsorption being 432.4 ppm, whereas by using Magnetic Activated Carbon, CPO β-carotene after adsorption remains at 426.1 ppm. Meanwhile, increasing the adsorption time causes the absorption of β-carotene to become greater. By using Activated Carbon the remaining β-carotene is 300.1 ppm after 120 minutes, whereas by using Magnetic Activated Carbon the optimum absorption time is faster and the amount of β-carotene absorbed is greater. The remaining βcarotene after absorption with Magnetic Activated Carbon was 288.7 after 90 minutes of adsorption. Apart from being able to absorb β-carotene, magnetic activated carbon is also better at reducing FFA and PV levels from CPO.
The Effect Of Administration Of Beluntas (Pluchea indica L) Leaf Extract On Albumin Levels And Total White Rat Serum Protein (Rattus novergius) Which Is Induced With E.coli Bacteria Br Tarigan, Tesya Lonika; Silitonga, Pasar Maulim
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.v7i2.62249

Abstract

This study aims to determine whether giving beluntas leaf extract has an effect on albumin levels and total serum protein in white mice induced with E.coli bacteria. RAL was used consisting of 3 treatments and 5 replications. White mice were induced and then given 0.5 ml of extract at a dose of 0.00 mg/kgBW; 300 mg/kgBW; and 600 mg/kgBB. The results showed that administration of the extract had a very significant effect on albumin levels and total serum protein in white mice. Giving the extract at a dose of 600 mg/kgBW gave the highest serum albumin levels but gave the lowest total protein levels. Giving the extract at a dose of 0.00 mg/kgBB; 300 mg/kgBW; and 600mg/kgBW in white mice were induced to give average albumin levels of 2,706 g/dL respectively; 2.844 g/dL; 4.454 g/dL and the mean total serum protein levels were 8.51 g/dL respectively; 8.86 g/dL; 8.8 g/dL.
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%.
Effect Type of Desorption Eluent and Concentration in Desorption of Zn2+ Cation from Sulfonate Modified Silica Gel-GPTMS (Glycydoxypropyltrimethoxysilane) Adsorbent Hafis, Muhamad; Oktavia, Budhi; Alizar, Alizar; Warda Ningsih, Sherly Kasuma
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.v7i2.62256

Abstract

Silica has silanol groups contained in it which have low binding ability because it has low acidity, resulting in low absorption effectiveness on silica. In order to improve the properties and to expand the field of utilization, a modification process is carried out on silica gel using GPTMS bridging compounds and sulfonate salts as modifiers. The study explains that CaCl2.2H2O with a desorption percent of 97.25% has a greater ability than NaCl which is only 83.93% in the desorption of Zn2+ cations. The study also explains that the optimum concentration of CaCl2.2H2O eluent in the desorption of Zn2+ cations is at 1mmol/L where the desorption yield is 93.74%.
Flavonoid Isolation And Toxicity Test Using The BSLT (Brine Shrimp Lethality TestI) Method From Parasite Flower Coffe Extract (Loranthus ferrugineus Roxb.) Roza, Destria; Girsang, Sedianta
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.v7i2.62301

Abstract

This research aims to isolate compounds from extracts of coffee parasite flowers (Loranthus ferrugineus Roxb.) and determine their toxicity activity using the BSLT (Brine Shrimp Lethality Test) method. The results of the identification of secondary metabolite compounds show that the coffee parasite flower extract contains alkaloids, saponins, tannins and flavonoids. The results of the toxicity activity of the coffee parasite flower extract using the BSLT method show that the extract has high bioactivity and has an LC50 value of 93.4266 µg/mL. Meanwhile, isolation of flavonoid compounds from coffee parasite flower extract (Loranthus ferrugineus Roxb.) based on infrared spectroscopy (IR) analysis showed the presence of vibrations of the O-H, С-Н, С-О, C-C, and C-O groups which indicated the presence of flavonoid group compounds.
An Investigation of the Functional Groups and Structure Characteristics of a Polymer Blend of Polystyrene and Poly(ε-Caprolactone) Produced by Using Bis(Dibenzoylmethanato)Zirconium(IV) Chloride Catalyst Munzirwan, Rudi; Muhammad Yusuf, Muhammad Yusuf; Utama, Erwinsyah
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.v7i2.62252

Abstract

Although polystyrene (PS) finds widespread use in household applications, its non-biodegradable nature raises concerns about its environmental impact. Therefore, modifying PS by blending it with a biodegradable polymer such as poly(ɛ-caprolactone) (PCL) is essential. This study focuses on investigating the functional groups and structural characteristics of PS/PCL blends. In this study, we produce polyblend using the solvent casting method. On the other hand, the PCL employed in this study was synthesized using the bis(dibenzoylmethanato)zirconium(IV)chloride (bis(dibzm)2Zr) catalyst. Next, the FTIR analysis indicates a Van Der Wall’s interaction between PS and PCL. Therefore, we did not find any absorption of new functional groups outside of the PS and PCL functional groups. Next, the XRD analysis revealed that polyblend has a more crystalline structure than PS. Meanwhile, PCL has a more crystalline structure than PS/PCL polyblend and pure PS.
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

Page 15 of 18 | Total Record : 179

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