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Muhammad Fathurrahman
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he_jsac@unpak.ac.id
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Jl. Pakuan No 1. Ciheuleut, Kel. Tegallega, kec. Kota Bogor Tengah, Kota Bogor, Bogor, Provinsi Jawa Barat
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Helium: Journal of Science and Applied Chemistry
Published by Universitas Pakuan
ISSN : 27761711     EISSN : 27764508     DOI : http://dx.doi.org/10.33751/helium.v2i1.5407
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Welcome to Helium: Journal of Science and Applied Chemistry. Helium: Journal of Science and Applied Chemistry is a journal that publishes scientific papers in the field of chemistry. This Journal, run by Chemistry Study Program, Universitas Pakuan, Bogor. The Journal provides opportunities for scholars to submit papers in chemistry, and also management policies related to all aspects of chemistry and its sub-disciplines. The manuscript will not only be concerned with physical, organic, inorganic, analytical, and biochemistry but also in general science, and its applications are welcome, and fields that will be published online. The internet connection will add to the richness of information and scientific knowledge derived mainly from research. This journal is published two times a year, well documented in the form of books, which include a variety of chemistry papers by writers of various backgrounds. In addition, we also have partners from local editors who graduated as professor from some universities who will review each article before publication. Each article or paper published in this Journal will definitely be useful to all visitors and readers. Articles submitted to this journal will be reviewed by reviewers before publication by blind review.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 52 Documents
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Quality Active Charcoal from Skin Peanut Land (Arachis Hypogaea) with Various Activation Methods Hermawan, Ujang; Sutanto, Sutanto; Kusumawardani, Linda Jati
Helium: Journal of Science and Applied Chemistry Vol 4, No 1 (2024): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v4i1.9852

Abstract

Peanut shells (Arachis Hypogaea) are characterized by seeds enveloped in sufficiently hard skin. The peanut shell is composed of organic compounds with the potential to be converted into activated carbon. This research aims to determine the quality of charcoal active with various activation methods and evaluated based on SNI 06-3730-1995. Chemical activation was conducted by immersion in 0.1 M NaOH, 0.1 M H2SO4, and 0.1 M NaCl, while physical activation was at a temperature of 500 ⁰C and without activation as a control variable. The best test results show by activating with a temperature of 500 ⁰C with results water content amounting to 3.58%, the results of here ash content were 3.82%, volatile matter of 9.55%, carbon content of 83.05%, benzene absorption capacity of 17.5177%, iodine absorption capacity of 753.23 mg/g. FTIR analysis shows that charcoal active with activation 500 ˚C contains C=O functional group, and SEM analysis showing the presence of varying pore surfaces in activated charcoal.
Determination of Biodegradation Rate of Bioplastic with Controlled Environment Dwiyana, Amelia; Sutanto, Sutanto; Fathurrahman, Muhammad; Herlina, Eka
Helium: Journal of Science and Applied Chemistry Vol 3, No 2 (2023): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v3i2.9521

Abstract

The use of synthetic plastics in everyday life has a negative impact but can be reduced in effect, if replaced with biodegradable plastics. Polymer biodegradation can occur because of microbiological infestation of the material. Microorganisms could produce various kinds of enzymes that can react with polymers. This study aims to study the effect of adding organic matter spearhead bacteria on the biodegradation rate in test samples with the help of Bacillus sp bacteria and the bacterium Pseudomonas sp. In this case, bioplastic samples were characterized using Fourier Transform Infrared (FTIR) spectroscopy and continued with quantitative analysis using gravimetric methods to determine biodegradation rates based on CO2 weight. The results of the characterization test study showed that the test sample containing cellulose is characterized by the presence of glycosidic -OH, -CH, and C-O functional groups. The determination of the rate of biodegradation gave the value of the rate constant microcrystalline cellulose as a positive control of 0.0489 day-1, Bioplastic A without inoculum addition of 0.0451 day-1 while Bioplastic A with the addition of inoculum by 0.0423 day-1 . Meanwhile, Bioplastic B without inoculum addition is 0.0254 day-1, and bioplastic B with inoculum addition is 0.0391 day-1.

Page 6 of 6 | Total Record : 52

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