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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 12 Documents
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Search results for , issue "Vol 7, No 2 (2024): JULY 2024" : 12 Documents clear
Adsorbent Preparation From Rice Husks Coated With Nanochitosan From Crab Shells Lubis, Arinda Budiarti; Herlinawati, Herlinawati
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.v7i2.62258

Abstract

Rice husks are a waste that is often found, containing 50% cellulose and 25-30% lignin so it has the potential to be used as an absorbent material. Therefore, rice husks can be used to make active carbon. The carbon activation process using HCl is preferred because compared to other acids, carbon activated with HCl shows better adsorption capacity. Chitosan comes from chitin found in crustaceans such as crabs. The crab shells are then processed to obtain chitosan. This research aims to produce rice husk adsorbent coated with nanochitosan from crab shells. Characterization in this study used FTIR which showed the presence of N-H groups as a characteristic of chitosan at a wavelength of 3354.42 cm-1. PSA analysis shows nano-sized chitosan with a size of 58.15 nm. Coating rice husk activated carbon with crab shell chitosan has produced a suitable adsorbent and can be used for further testing..
Effectiveness of Kepok Banana Peel Waste With Potassium Hydroxide Activation as Methylene Blue Dye Adsorbent Sidabutar, Putri Rebecca; Kembaren, Agus
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.v7i2.62254

Abstract

Banana peels are usually considered as waste and cause environmental pollution. However, banana peels can be used as an adsorbent material to reduce the impact of methylene blue dye use because they contain high lignocellulose. This study aims to determine the characterization, optimum mass and optimum time. The adsorbent was made using dried and carbonized banana peels at a temperature of 400°C for 2 hours. After the carbonization process, the adsorbent was activated using 5 M potassium hydroxide for 2.5 hours. Based on the results of the study, it showed an optimum mass of 0.121 grams and an optimum time of 90 minutes. The efficiency of methylene blue dye absorption on activated carbon was higher than that of banana peel carbon.
Effectiveness of HDTMA-Br Surfactant Modified Jackfruit Peel Activated Carbon Adsorption on Methylene Blue Nabillah, Ghoiriah; Dewi, Ratna Sari
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.v7i2.62259

Abstract

Jackfruit peels are usually considered as waste and cause environmental pollution. However, banana peels can be used as an adsorbent material to reduce the impact of methylene blue dye use because they contain high lignocellulose. This study aims to determine the characterization, optimum mass and optimum time. Adsorbents are made using dried and carbonized jackfruit skin at a temperature of 400°C for 2 hours. After the carbonization process, the adsorbent was activated using 5 M potassium hydroxide for 4 hours. . Based on the research results, it shows that the optimum mass of carbon is found at a mass of 0.16 grams and the optimum mass for activated carbon and HDTMA Br activated carbon occurs at a mass of 0.07 grams. Meanwhile, the optimum time for carbon was 60 minutes and for activated carbon and HDTMA Br activated carbon was 45 minutes.
Adsorption Equilibrium Properties of Zn(II) on Activated Carbon Composite of Derived Empty Palm Oil Fruit Bunches with Metal Organic Frameworks Cu(TAC) Jasmidi, Jasmidi; Zubir, Moondra; Selly, Rini; Pulungan, Ahmad Shafwan; Faradilla, Putri; Rahmah, Siti; Tanjung, Amar Lohot
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.v7i2.62250

Abstract

This study aims to determine the adsorption equilibrium of the activated carbon of empty palm oil fruit bunches and KA-Cu(TAC) on Zn(II). Oil palm empty fruit bunches are used as a bio-sorbent in making carbon at a temperature of 5000 C, the resulting carbon is activated using H3PO4 and modified into a composite with metal organic frameworks of Cu metal and terephthalic acid. MOFs and KA-Cu(TAC) composites were produced by reflux method. Activated carbon, MOFS and KA-Cu(TAC) were characterized using XRD. The adsorption process of Zn(II) metal was analyzed using AAS and determined the optimum conditions with various concentrations to determine the adsorption equilibrium. XRD characterization results show that activated carbon has an amorphous structure, while MOFs Cu(TAC) and KA-Cu(TAC) have a crystalline structure. The optimum condition of activated carbon and KA-Cu(TAC) at a concentration of 180 ppm with the appropriate adsorption isotherm model is the Langmuir isotherm.
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.
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.
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.

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