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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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Water Purification Process Uses Adsorbents From Natural Lailatul Fadhilah; Jasmidi Jasmidi; Rini Selly; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23095

Abstract

Adsorbent is an adsorption that is used to absorb various pollutants. Adsorbents can be used from natural materials. Natural ingredients that can be used are oil palm empty bunches. Oil palm empty bunches are a carbon-rich material that is getting new research interest in adsorption because of its abundance and properties. Oil palm empty bunches contain carbon, nitrogen, hydrogen, oxygen, sulfur, lignin, hemicellulose, and cellulose. Oil palm empty bunches are used as adsorbent for water saturation.
Application of Humid Silica Plus Fertilizer with Various Combinations of Planting Media Thomson A.S. Girsang; Veny Apriyani; Desti S.N Pasaribu; Lisnawaty Simatupang
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.v2i2.14000

Abstract

Volcanic ash contains minerals needed by soil and plants with the highest composition of total elements, namely Ca, Na, K and Mg, other macro elements in the form of P and S, while micro elements consist of Fe, Mn, Zn, Cu. The layer of volcanic dust that has the potential to contain nutrients for soil fertilization for agriculture can actually only be used about 10 years after the spread of volcanic ash. Soil fertilization can be accelerated if mixed with organic materials such as by using chicken manure fertilizer which has nutrients from chicken manure: N = 1.7%, P2O5 = 1.9%, K2O = 1.5%. Humic acid helps regulate clay and soil improvement, binds and transfers micro elements from the soil to plants, increases water absorption, and stimulates the development of microorganisms in the soil. Therefore, this study was conducted to make humic silica fertilizer in the planting medium by utilizing volcanic ash in combination with chicken manure mixed with soil. In this study apart from being a source of humic acid, chicken manure is also beneficial because it contains microorganisms which will be useful in accelerating the fertilizer incubation process. The composition of the fertilizer mixture used in this study is: volcanic ash sinabung: chicken manure: soil = 20: 50: 30; 30: 50:20; 40: 50: 10. The mixture is stirred evenly and then incubated for 30 days. After 30 days, the nutrient content of these fertilizers was tested and the highest content of the nutrients obtained in the combination was 20:50:30 namely: Organic C-1.35%, N-total 0.2%, P-available 20.16 ppm , K-available 0.527 me / 100g, C / N 6.75%, and humic acid contained in 3.925%
Comparison of Wet Destruction, Dry Ashing, and Acid Homogenic Methods In Determining Na And K in Beef and Chicken Using Flame Photometer Herlinawati Herlinawati; Normalina Arpi; Nurul Azmi
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19533

Abstract

This research was purposed to compare the yield of destruction method in determining sodium (Na) and potassium (K) content in beef and chicken by using flame photometer. The destruction methods used they are wet destruction, dry ashing, and acid homogenic method. In acid homogenic method two types of acid are used as solvents are HCl and HNO3 with concentration variation of 0.5 M; 1 M; and 1.5 M. While the wet destruction method uses a mixture of concentrated HNO3 and HClO4 (1: 2) and the dry ashing method uses only HNO3. The highest Na content obtained from the three methods after being analyzed by Analysis of Variance (ANOVA) and the Smallest Significant Difference (SSD) test was found in the dry ashing method that is 86.33 mg Na in beef, when compare with the literature is around 64 – 69 mg. While the highest K content was found in acid homogenic method using HCl solvent is 618.77 mg K in beef, when compare with the literature is around 334 – 355 mg.
Analysis of Banana Leaves as Noise Reducing Media With Addition of Zalacca Plam Peel Irmadona Irmadona; Elwy Asrianto Marbun; Aisyah Nurul Ilmi Lubis; Putri Lynna A. Luthan
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.v2i1.12367

Abstract

At present there are very many sound absorbers developed with modifications from various simple materials available. A comparative study and analysis of banana midribs as a sound dampening medium has been tested by several other researchers, but not with the addition of zalacca bark. This research was continued to find out whether salak skin would reduce the sound. In this study carried out by the method of making banana midrib fiber, salak skin carbonization, composite fabrication and specimen testing. The specimens used is 30x30 cm. This composite consists of polyester resin as a matrix, banana midrib fiber and salak skin as a pore enhancer with a ratio of 5: 1. The results of the data from this analysis are that the sound can be muted by a composite that has been tested with a specimen test of 6 dB; 8.3 dB; 16.8 dB; 16.9 dB; 14 dB.
Characterization and Antioxidant Activity Edible Film of Durian (Durio zibethinus) Seed Starch with the Addition of Soursop (Annona muricata L.) Leaf Yuni Fatisa; Nadya Agustin
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.v1i1.10200

Abstract

Edible film is one of the environmentally friendly packaging materials and not harmful to health because it is made up of natural ingredients such as proteins, lipids, and polysaccharides. In addition to environmentally friendly, the development of edible film on food packaging can provide better product quality, as it is made from natural ingredients that contain various natural chemical compounds that are beneficial and can be directly consumed. In this study prepared edible film derived from durian seed starch with the addition of soursop leaf extract. This research aimed at knowing the physical and chemical characteristics, and antioxidant activity of  the edible film. The type of research used is experiment methods. The results showed that the best research findings of the edible film were on the addition of 2 g soursop leaf extract and the physical characteristic was transmission of water vapor that was 1.70 g/m2. 24 hours, the chemical characteristics were water content that was 17.33% and activity of antioxidant that was 1.5875 mg/mL.
Electroplating Method on Copper (Cu) Substrate with Silver (Ag) Coating Applied Rini Selly; Siti Rahmah; Hafni Indriati Nasution; Ricky Andi Syahputra; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19524

Abstract

Knowing about metal coating (electroplating) is the electrodeposition of coatings or coatings attached to the electrodes to protect the substrate by giving surface properties and dimensions different from the base metal or finishing technique, by coating metal that is easily corroded (corrosion) with metals that are resistant to corrosion with electrical and chemical engineering. Whereas in Indonesian society the technique for metal coating is very familiar with the name of the gilding technique. In ancient times before electroplating and gilding were discovered to avoid corrosion of metals, the incorporation of metals such as copper with tin into bronze, copper with zinc into brass in addition to being resistant to corrosion also added to the beauty of color. Among the alloys above bronze is the oldest alloys that have been used by humans. With the development of the times, more modern gilding techniques were found to be a more practical method, namely electroplating, gilding with electrical and chemical processes that make metals resistant to corrosion. Metal coating is a scientific field which is one of the applications of electro chemical technology. Very closely related to the material science and technology, surface chemistry, physical chemistry, to the engineering. Various metals can be plating. The various metals are classified into five groups: tumbal coatings, decorative-protective coatings, engineered metal coatings, rare-use metals, and various types of alloys. All of these have their own characteristics, both advantages and disadvantages.
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.
Synthesis and Characterization of Zeolite X from Boiler Ash and Aluminum Foil Waste Intan Ayu Safitri; Iis Siti Jahro
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23090

Abstract

This study aims to determine the effect of the Si/Al molar ratio and the number of Na2EDTA additions on the purity and crystallinity levels of the synthesized zeolite X. zeolite X was synthesized by hydrothermal method at 70°C and 120°C for 3 and 6 hours, respectively. In the synthesis of zeolite X used boiler ash and aluminum foil waste. The results of characterization using Fourier Transform Infra Red (FT-IR) and X-Ray Diffraction (XRD) showed that the level of purity and crystallinity of the synthesized zeolite X was influenced by the variation of Si/Al molar rasio and amount of Na2EDTA addition. The zeolite with the best quality was obtained from the synthesis with a Si/Al molar ratio of 1.6 and the amount of Na2EDTA added as much as 3.0 g. The synthesized zeolite X has a purity level of 75% and a degree of crystallinity with a total intensity of 845.
Synthesis and Characterization Nanomagnetite by Co-precipitation Rahimah Rahimah; Ahmad Fadli; Yelmida Yelmida; Nurfajriani Nurfajriani; Zakwan Zakwan
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.v2i2.13995

Abstract

Magnetite (Fe3O4) nanoparticles becomes a new innovation that gets attention of biomedicine scientists. Magnetite can be applied to cancer treatment as a drug carrier because it’s good biocompatibility and very low toxicity. The aim of this study was to determine the effect of temperature and retention time on the magnetite particle characteristics prepared by co-precipitation method. The first, FeCl3 and FeCl2 with 2:1 mole ratio were reacted with 10% NH4OH at 40 - 80°C temperatures during 1 – 30 minutes in a beaker glass. Subsequently, the precipitate was separated using filter paper and it dried into air oven at 100°C. The characteristic of obtained magnetite powder were determined using XRD and SEM. From XRD pattern indicates that magnetite formed at all temperatures with crystallite diameter in the range of 7-13 nm. The SEM results indicate the agglomeration of the magnetite particles with size in the range of 1.37 to 1.72 μm. In the other hand, the higher of temperature and retention time will make the agglomeration of the particles become more uniform. The increasing of temperature and the retention time will increase the magnetite crystallinity level.
Preparation of Activated Carbon Based on Oil Palm Waste for Ammonia Removal Ivan Daniel; Rini Selly; Jasmidi Jasmidi
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19529

Abstract

The aim of this study Industri is to reduce ammonia concentration in tannery waswater using Oil Palm waste. Palm oil is one of the strategic industry that is engaged in agriculture (agro-based industry) that many develop in tropical countries such as Indonesia. Palm oil plantations produce solid waste, one of which is an empty bunch. and the palm oil processing industry produces the liquid waste of one of them ammonia. By looking at the opportunity how to cope with the waste of ammonia derived from the processing of palm oil by making biosorbents from solid waste of empty palm plants that utilization of empty waste plants is still not maximal. With some treatment and tested with BET to see the surface area and total volume of pores after and before the treatment of activated carbon.

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