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Jurnal Periodic Jurusan Kimia UNP

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Published by Universitas Negeri Padang

ISSN : - EISSN : 23391197 DOI : https://doi.org/10.24036/p.v11i2.113715

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

Periodic adalah jurnal nasional yang berisi artikel-artikel bidang ilmu kimia, seperti bidang Kimia Analitik, Kimia Fisika, Kimia Anorganik, Kimia Organik dan Biokimia. Jurnal ini mempublikasikan hasil penelitian original, komunikasi singkat, dan artikel review. Artikel yang telah diterbitkan dalam jurnal ini berarti bahwa kegiatan penelitian yang diterbitkan adalah belum, dan tidak akan diterbitkan di tempat lain. Periodic (e-ISSN 2339-1197) diterbitkan oleh Jurusan Kimia dan mulai tahun 2022 disebut Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Indonesia. Periodic terbit berdasarkan berdasarkan surat edaran Direktorat Jenderal Pendidikan Tinggi No. 152/E/T/2012 tentang publikasi karya tulis ilmiah dan terbit sejak Oktober 2012.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 343 Documents

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Studi Pengaruh Faktor Suhu, Waktu, Massa Katalis dan Perbandingan Mol Dalam Produksi Biodiesel Dari PFAD Menggunakan Katalis Karbon Tersulfonasi Naka Yura; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Depletion and environmental problems caused by the use of fossil fuels, the need for alternatives to balance the availability of nature. Biodiesel synthesis has become a concern lately for renewable and sustainable fuels. In this work, biodiesel is synthesized from 5 different acid catalysts with the use of the same raw material, PFAD. Catalysts used for biodiesel synthesis are acid catalysts from glucose derivatives (D-glucose) acid catalysts from starches, acid catalysts from empty fruit bunches, acid catalysts from oil palm and bamboo branches, and acidic catalysts from glucose modified with oscillation flow. Acid catalyst from glucose derivative (D-Glucose) obtained conversion of FFA and FAME respectively 95.4% and 92.3% with the optimum reaction conditions was 2.5% of the catalyst mass, 10: 1 mole ratio of PFAD methanol, reaction temperature 75 C and reaction time for 2 hours. Acid catalyst from starch obtained conversion of FFA and FAME respectively were 94.6% and 90.4% with the optimum reaction conditions ie 2% mass of catalyst, 10: 1 mole ratio of PFAD methanol, reaction temperature of 75C and reaction time of 2 hours. Acid catalyst from empty fruit bunches obtained 98% FFA conversion with optimum conditions of 4% catalyst mass, 16: 1 mole ratio of PFAD methanol, reaction temperature of 100 C, time of 3 hours. Acid catalysts from oil palm and bamboo shells have FFA conversion and different FAME values, namely 97% and 95% for CKS, while 95.8% and 94.2% for bamboo with the same optimum conditions at 4% catalyst mass, 15: 1 comparison mole of methanol, temperature 65 C, reaction time 1 hour. And acid catalyst from glucose modified by oscillation flow gets FFA and FAME conversion of 97% and 94.21% with optimum reaction conditions, 2.5% of catalyst mass, 9: 1 mole ratio of methanol, temperature of 60C and reaction time for 50 minute.

Pengaruh Konsentrasi Awal Larutan terhadap Penyerapan Ion Logam Berat Cr3+ menggunakan Biomassa Alga Hijau Mougeotia sp. yang Dimodifikasi dengan Metanol Hilmi Rahmadina; Mawardi Anwar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Biosorption is an alternative method that can be used to overcome the presence of heavy metal chromium (III) in water. Green algae Mougeotia sp. Can be used as a biosorbent, because it has functional groups such as carboxyl, carbonyl, amine and hidroxyl. To find out how big the role of each functional group is modified. Where the functional group to be modified is the carboxyl group using methanol solution. In this research, the rebellion was carried out with a batch system, carried out by stirring the heavy metal solution with biosorbent then filtered, the resulting filtrate was analyzed using an Atomic Absorption Spectrophotometer (AAS). The variables to be tested is concentration. Based on the research results, the optimum absorption of green algae biomass Mougeotia sp. Against heavy metal ions Cr3+ took place at concentration of 250 mg/L with a maximum absorption capacity (qm) of 5.3050 mg/g. This biosorption process follows the Langmuir adsorption isotherm equation with an R2 value of 0.9412.

Optimization of Amount of Ethylene Glycol and Reflux Temperature in Glycolysis of The Waste Polyethylene Polythene Terephthalate (PET) on Jerbung Shrimp in Padang City Atikah Muthmainnah; Indang Dewata
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v9i2.108737

Polyethylene Terephthalate (PET) is one of the most widely used plastics, especially in packaging. The many uses of PET along with the increasing amount of PET waste that has negative impact on the environment because PET is a plastic that can only be used for one time use and cannot be decomposed naturally. Therefore, it is necessary to recycle PET by depolymerizing by glycolysis into bis (2-hydroxyethyl terephthalate) BHET. In this research, glycolysis was using EG variations of 20, 30, 40, and 50 mL and temperature variations of 166, 176, 186, and 196 oC. The results obtained 83.425% BHET yield under optimum conditions of EG as much as 30 mL and temperature of 196 oC. The results was characterized by Fourier Transform Infra Red type perkin elmer universal ATL Sampling Accessors 735 B at wave numbers 600 - 4000 cm-1 to determine the functional groups that make up the BHET.

Sintesis Membran Molecularly Imprinted Polymers (MIPs) dengan Metoda Photopolimerisasi sebagai Bahan Penyerap Glukosa Pihanda, Febi Aulia; Ulianas, Alizar
Periodic Vol 8, No 2 (2019): PERIODIC
Publisher : Jurusan Kimia FMIPA UNP

MIPs are specific molecular identification polymer molds that are sensitive to their template molecules. The purpose of this discussion is to find out how to synthesize and characterize glucose MIPs membranes, optimum conditions for absorption of MIPs against glucose and application of Glucose MIPs. Based on literature, MIPs resulting from synthesis have a physical form in the form of solids. FTIR test results on MIPs are good, namely the appearance of O-H groups that indicate the presence of hydrogen bonds that can bind the template molecule in the form of glucose, in this discussion appears at wave number 3483,56 cm-1. The absorption capacity of MIPs for glucose can be influenced by the amount of MIPs, pH of glucose solution. Besides MIPs can be used to absorb glucose from the urine.

Penguraian Zat Warna Metilen Biru Menggunakan Katalis Fe3O4-Fe2O3 Dalam Silika Mesopori Winda Selfira; Syamsi Aini
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v10i1.109591

Dyestuff waste from the textile industry process which is disposed of directly into the environment will cause problems because it is toxic and carcinogenic. Methylene blue is one of the azo dyes that is often used as a textile dye. One way to decompose dyes is to use a catalyst Fe3O4-Fe2O3@SiO2 which is synthesized using natural raw materials from iron sand and silica sand and is assisted by H2O2 oxidizer through the fenton method with the formation of OH for the decomposition process of methylene blue. Decomposition of methylene blue has been carried out using the fenton method using Fe3O4-Fe2O3@SiO2 as a catalyst and H2O2 as an oxidizing agent. The experimental parameters were the optimum time, the optimum amount of catalyst and the reusability test of the Fe3O4-Fe2O3@SiO2 catalyst in decomposing methylene blue. The optimum conditions for decomposition of the methylene blue dye using Fe3O4-Fe2O3@SiO2 were 60 minutes and the amount of catalyst was 100 mg. At the optimum condition, the percentage of degradation is > 98%. For testing the reusability of the Fe3O4-Fe2O3@SiO2 catalyst can be used 2x to decompose methylene blue. In the second use, the percentage of degradation is 83%, this is because Fe3O4 has changed to Fe2O3 so that the degradation result decreases.

Efek Crosslinker terhadap Performa Komposit Selulosa Bakteri – Ekstrak Daun Kembang Sepatu ( Hibiscus rosa- Sinensis L ) Egidia Mayendra; Minda Azhar; Indang Dewata; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract — Bacterial cellulose can be applied in various fields such as biomedical fields, separation membranes, artificial blood vessels, and substrates for tissue engineering cartilage. Bacterial cellulose still has low mechanical properties, so a bacterial cellulose composite with hibiscus leaf extract (KSB-EDKS) is formed to obtain new, better materials. The purpose of this study was to determine the effect of adding starch as a crosslinker, on the mechanical, physical, and structural properties of KSB-EDKS. Bacterial cellulose is produced from a mixture of coconut water, sugar and urea. Then fermented with acetobacter xylinum for 14 days. Bacterial cellulose formed in composites with hibiscus leaves is called bacterial cellulose extract of hibiscus leaves (KSB-EDKS). KSB-EDKS will be characterized by testing tensile strength, moisture content, structural analysis using FTIR and determining the degree of crystallinity using XRD. The addition of a crosslinker can reduce the percentage of KSB-EDKS water content. The best tensile strength test results were KSB-EDKS added with 3% tapioca flour solution with a value of 38.3 MPa, the FTIR spectrum showed that the functional groups in cellulose had just shifted in the range of the same wave number values and for the degree of crystallinity the addition of starch as crosslinker can reduce the degree of crystallinity in KSB-EDKS. Keywords — Bacterial cellulose, Composite, Crosslinker, Hibiscus leaves

Optimasi Kecepatan Pengadukan dan Waktu Kontak Zat Warna Metanil Yellow terhadap C-SinamalKaliks [4] Resorsinarena (CSKR) Aminullah Mimi Darwati; Sri Benti Etika; Fitri Amelia
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract — Uncontrolled handling of industrial waste disposal systems causes pollution to the environment by hazardous materials such as dyes. Activities that cause the excessive discharge of dyes come from the textile, paper, pigment and paint industries. This industrial activity releases dyestuffs that enter through the food chain so that it has a bad impact on human health. One of the alternative methods used in tackling dye waste pollution is adsorption. Organic compounds that have great potential to be used as adsorbents to absorb dyes are C-Sinamalkaliks [4] Resorsinarene (CSKR). This study uses CSKR to absorb dye which aims to determine the potential of C-SinamalKaliks [4] Resorsinarene (CSKR) which is an adsorbent for the absorption of the dye methanyl yellow. This research was conducted using a batch method with various treatments of stirring speed and contact time. The results showed that the optimum absorption of metanyl yellow against CSKR was at the contact time of 150 minutes and the stirring speed of 100 rpm with an absorption capacity of 2.13 mg/g.

Sintesis Nanopartikel Magnetik Besi Oksida (Fe3O4) Metode Green Chemistry Dengan Ekstrak Daun Sirih Merah (Piper Crocatum) Rafiqa Khaira; Alizar Ulianas; Minda Azhar; Mawardi Anwar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Magnetic nanoparticles have become an interesting topic in recent years, as magnetic nanoparticles have a greater degree of magnetism, high saturation magnetization, and ease of modification and handling. One of them is the Fe3O4 magnetic nanoparticles which are used in various fields, such as in the biomedical sector which acts as antibacterial, hyperthermia, anticancer, etc. This study aims to synthesize magnetic nanoparticles of iron oxide Fe3O4 using phenolic compounds contained in red betel leaf extract as a styling agent with a co-precipitation method based on green chemistry and to characterize them. The nanoparticles formed were measured for their magnetic force with a gaussmeter and characterized by functional groups, particle size and particle surface morphology using FTIR, XRD and SEM. The data obtained show that the optimal composition for the formation of Fe3O4 nanoparticles is to compare FeCl2: FeCl3 (0.01 mol: 0.02 mol) with a volume of 5 mL of red betel leaf extract which produces a force magnetic 0.16 mT. The characterization by FTIR shows the aromatic groups O-H, C = O carboxylate and C-H which indicate the presence of organic compounds, namely phenolic (gallic acid) which functions as a protective agent (styling agent) of Fe3O4. The XRD test obtained information on the average size of the formed nanoparticles based on the FWHM value (full width at half maximum) using Scherer's equation, which is 26.66 nm. Meanwhile, SEM data shows that the shape or morphology of the Fe3O4 magnetic nanoparticles is needle-like.Keywords — Nanoparticles, iron oxide Fe3O4, green chemistry, red betel leaf extract (Piper Crocatum)

Sintesis dan Karakterisasi Karbon Aktif dari Ampas Tebu Diaktivasi menggunakan Gelombang Mikro Hendra Zalmi; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Synthesis of activated carbon and physical activation using microwaves. Sugarcane bagasse is carbonized at a temperature of 250 oC for ninety minutes and is activated using microwaves which refer to the principles of green chemistry. Microwave one of the electromagnetic waves that can be at a frequency of 2450 khz. Microwaves are able to work as activator of 450 watts of activated carbon for two minutes and the iodine number is from 203.0560 mg / g to 836.9365 mg / g which meets the indonesian national standard no 06-3730-1995 which is 750 mg / g. Activated carbon was characterized optimally using a FTIR spectrophotometer. The spectra results show the presence of a functional group -OH at wave number 3350-3252 cm-1, C=C at wave number 1570-1320 cm-1, C-O at wave number 1300-900 cm-1, and ch at wave number 995-670 cm-1. Adsorption of activated carbon against rhodamine dye obtained optimal conditions with a concentration of 350 mg / L, time of 120 minutes which has an adsorption capacity of 7.251724 mg / g.

Optimasi Waktu dan Suhu Refluk Pada Glikolisis Limbah Mikroplastik Polyethylene Terephthalate (PET) Dalam Garam Konsumsi di Kota Padang Meilindri, Rahmi Aulia; Dewata, Indang
Periodic Vol 8, No 2 (2019): PERIODIC
Publisher : Jurusan Kimia FMIPA UNP

The use of plastics is increasing every year, causing plastic waste to accumulate. Plastics that are very often found are PET types such as beverage packaging bottles. Plastic waste pollutes the waters because plastic have processes that become microplastic which can pollute marine products, one of which is consumption salt. The handling of PET (polyethylene terephthalate) microplastic can be done by depolymerizing PET plastic polymers into its constituent monomers, namely BHET (Bys-hydroxylethyl terephthalate) monomers using the glycolysis method. The glycolysis method is carried out with ethylene glycol (EG) solvent and Na2CO3 catalyst. PET plastic samples used are PET plastic beverage bottles and salt consumption. The optimum condition of reflux time and reflux temperature of the glycolysis process in this study showed the highest yield of 48.36%, namely at 90 minutes with a temperature of 186 Â° C Characterization of PET glycolysis results with FTIR showed the presence of carboxylic O-H peaks, C = O carbonyl, C-O carboxylates, C-H alkanes, and C-H aromatics which proved that PET polymers had glycolysis process into BHET monomers. The five consumption salt samples used did not show the presence of PET type microplastics by the glycolysis method in 10 grams of consumption salt samples.

Page 13 of 35 | Total Record : 343

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Editorial Address Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

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Contact Name
Budhi Oktavia

Contact Email
budhioktavia@fmipa.unp.ac.id

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periodic@fmipa.unp.ac.id

Editorial Address
Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

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Kota padang,

Sumatera barat

INDONESIA