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Budhi Oktavia
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Jurnal Periodic Jurusan Kimia UNP
Published by Universitas Negeri Padang
ISSN : -     EISSN : 23391197     DOI : https://doi.org/10.24036/p.v11i2.113715
Core Subject : Science, Engineering,
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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Pengaruh Ukuran Partikel Serta Laju Alir Pada Penyerapan Ion Logam Cr6+ Menggunakan Kulit Langsat (Lansium domesticum) Andini, Namira Tri; Kurniawati, Desy; Zainul, Rahadian; Nasra, Edi
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Chromium metal is a toxic and carcinogenic metal that needs to be addressed. Biosorption  can be used as one method to reduce lead metal level in waters. Biosorpsian is easy and simpler to use, more-ecomomial, and  environmentally friendly because it utilizes microorganisms and biomaterials. The purpose of this study was to determine the effect of particle size and flow rate on the absorption of Cr6+ metal ions using langsat peel as a biosorbent. In this study, Cr6+metal ions biosorption  was carried out using langsat peel with column method at a particle size variation of 106, 150, 250 and 425µm  and a flow rate variation of 1-4 ml/min. the results of this study were obtained optimum conditions at particle size 106 µm and flow rate 2 mL/min with optimum adsorbtion capacity of 5,02363 and 6,96203 mg/g.
Adsorpsi Zat Warna Methylene Blue Menggunakan Karbon Aktif Kulit Kelengkeng (Euphoria longan lour) Dengan Metode Batch Harmaiyani, Risky; Amran, Ali; Oktavia, Budhi; Kurniawati, Desy
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118807

Abstract

In Indonesia, longan skin has not been widely used. Longan skin contains lignin which has good absorption ability. The cause of this research is to calculate the finest absorption capability of longan peel activated carbon against methylene blue dye using the batch method. The results confirmed that the optimum absorption ability for the absorption of methylene blue at pH 4, concentration of 600 ppm, and contact time of 120 minutes at a stirring speed of 200 rpm, and a mass of 0.2 grams was 69.0679 mg/g.
Efek Aditif Ekstrak Betasianin dari Kulit Buah Naga (Hylocereus polyrhizus) Terhadap Kadar Asam Laktat Sinbiotik Set Yoghurt Munita, Azizah; Putri, Selvi Apriliana; Azhar, Minda
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.123718

Abstract

The use of synthetic food coloring raised the risk of chronic diseases, which was a serious problem in the food industry. To overcome this, a study was carried out on functional foods, especially synbiotic yogurt set, to evaluate betacyanin as a natural dye that had antioxidant properties. The goal was to provide an alternative solution to counteract free radicals, which are known to contribute to chronic diseases. This study examined the effect of betacyanin extract on lactic acid levels using homolactic fermentation. The experiment method involved a triplicate pattern, and different variations of betacyanin extract (5 mL, 10 mL, and 15 mL) were tested, alongside a negative control consisting of the synbiotic yogurt set without the addition of betacyanin extract. Statistical analysis, including One Way ANOVA and Tukey's test with GraphPad Prism 10.0, demonstrated that betacyanin had a significant impact on lactic acid levels. The synbiotic yogurt set with 15 mL of betacyanin extract exhibited the highest lactic acid content (1.88%), while the negative control displayed the lowest lactic acid content (0.98%). These findings indicate that betacyanin, as a natural dye, that had antioxidant properties and was capable of increasing the lactic acid content in the synbiotic yogurt set.Keywords — Betacyanine, red dragon peel, synbiotic set yogurt, lactic acid.
Efektifitas ZnO doping TiO2 Dalam Mendegradasi Zat Warna Metil Hijau dengan Metode Fotolisis Alfarisi, Fadil; Sanjaya, Hary; Beri, Deski; Etika, Sri Benti
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118598

Abstract

The textile industry sector in Indonesia is progressing. This progress is not followed by good and effective waste management. Methyl green dye waste is one example. Methyl green is organic waste that is difficult to decompose and is toxic. Therefore, an effective method is needed to decompose organic waste into environmentally friendly compounds using the photolysis method. This study aims to obtain the optimum time and the optimum concentration of TiO2 doping on the degradation of Methyl green by photolysis. The percentage of degradation of Methyl green was obtained from the measurement of the absorbance value using a UV-Vis spectrophotometer at the maximum wavelength of Methyl green (λmax) and the maximum wavelength was obtained at 640 nm. The results are the optimum time of degradation of Methyl green dye at radiation time of 150 minutes with a degradation percentage of 97.5%. In the variation of TiO2 dopant concentration, the optimum concentration of TiO2 dopant was found at 10% ZnO-TiO2 with 95% degradation.
Pemanfaatan Karbon dari Bunga Cemara Laut (Casuarina equisetifolia) untuk Penjernihan Minyak Jelantah Rahmi, Maulidia Arsyta; Putra, Ananda; Sari, Trisna Kumala; Pernadi, Niza Lian; Istiqamah, Siti Sarah; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124261

Abstract

Used cooking oil is waste oil that has been used many times and is also known as used cooking oil which contains food residue and is a pollutant to the environment. This oil contains free fatty acids, carbonyl compounds, and peroxides. The content contained in used cooking oil can cause poisoning in humans and cause pollution to the environment. This study aims to clarify used cooking oil so that it can be reused. Carbon from sea pine flowers is used as a solution to clarify used cooking oil in this study. BCL carbon was obtained using the calcination method at various temperatures of 250oC, 300oC, 350oC, and 400oC. The resulting carbon is then subjected to a proximate test. Based on the results of the proximate test, the results obtained were in accordance with the SNI 06-3730-1995 standard with the optimum value obtained at 350oC calcination temperature. The clarification of used cooking oil is carried out by mixing used cooking oil and carbon as a result of calcination at 350ºC. Variations in the mass of carbon used are 1,3 and 5 grams. The results showed that the carbon of sea cypress flowers can be used as an absorbent for cleaning used cooking oil which can adsorb its fatty acid content. The optimum absorbent of this study was the 5g CBCL sample. This is evidenced by the results of the analysis that has been carried out with the lowest density value of 0.83 g/mL, the highest flow rate value of 4.312 mL/s and the lowest acid number value of 0.5 mg KOH/g.
Pengaruh pH dan Waktu Kontak Terhadap Adsorpsi Ion Pb2+ pada Silika Gel-GPTMS Termodifikasi Sulfonat Afrilia, Yoni; Oktavia, Budhi; Kurniawati, Desy; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124343

Abstract

Adsorption is the process of accumulation of atoms or ions in solution on the surface of a solid adsorbent. Silica gel can be used as an adsorbent because it has two groups of active sites, namely silanol (Si-OH) and siloxane (Si-O-Si). The active groups also allow silica to be modified. This modification was made to increase the ability of silica to adsorb ions, one of which is Pb2+ ion. The modifier compound used is a sulfonic salt (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) with a glysidoxypropyltrimethoxysilane (GPTMS) linking compound. The modified adsorbents were characterized by FTIR and the absorption results were characterized by AAS. The modified adsorbent was to determine the optimum conditions for adsorption of Pb2+ ions using silica sulfonate. Adsorption was carried out using the batch method. The optimum absorption conditions for Pb2+ metal ions using silica sulfonate were obtained at pH 3, contact time of 45 minutes.
Efektivitas Antibakteri Ekstrak Jamur Endofit BS pada Media Tumbuh Beras Merah Pramesti, Radia Sagita; Iryani, Iryani; Ulfah, Mariam
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.119654

Abstract

BS endophytic fungus is a fungus isolated from the flower of the bitter plant (A. paniculata) which is known to produce various secondary metabolites which are reported to have antibacterial bioactivity. The purpose of this study was to determine the antibacterial activity of the extract of the endophytic fungus BS isolated from the bitter flower (A. paniculata) on brown rice growing media against Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria. BS endophytic fungi were grown on brown rice media and then extracted by maceration method with ethyl acetate as solvent. The antibacterial activity test of the extract was carried out by disc diffusion method. The results showed that BS endophytic mushroom extract grown on brown rice media could inhibit the growth of Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria at concentrations of 10%, 30%, and 50%. In conclusion, BS endophytic fungus isolated from A. paniculata flower can inhibit the growth of bacteria with the smallest diameter inhibitors successively on Staphylococcus aureus, Streptococcus mutans, Pseudomonas aeruginosa bacteria
Analisa Beberapa Sifat Fisikokimia dari Minyak Goreng Kemasan Hasil Penggorengan dengan Lemak Sapi Rahmi, Fathaniah Raviqa; Hardeli, Hardeli; Nasra, Edi; Pernadi, Niza Lian; Sabrina, Joya; Farhan, Muhammad; Nizar, Umar Kalmar
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125466

Abstract

Palm oil is one of the vegetable oils with the highest concentration of contaminants compared to other oils. The main components of palm oil are triglycerides which account for more than 95% and other components such as monoglycerides, diglycerides, free fatty acids, phosphatides and sterols. Beef in 100 grams contains fewer calories (498 kj), total fat (2.8 g), unsaturated fat (0.448 g), saturated fat (1.149 g) and cholesterol (50 mg) than goat meat of the same size .The nutritional composition of beef includes 18.8 grams of protein, 66.0 grams of water and 14.0 grams of fat. The aim of this research is to determine the physicochemical properties of packaged cooking oil produced from frying beef fat at certain temperatures and times. The physicochemical properties of the oil determined include density, flow rate, acidity index and saponification index. Bimoli cooking oil resulting from the frying process has a density value of 0.9205 gr/ml, a flow rate of 2.949 ml/s, an acid number of 3.06939 mgKOH/gr and a saponification index of 16.71005 mgKOH/gr. The results of this research indicate that the results of testing the physicochemical properties of packaged cooking oil have better values compared to the results of testing beef tallow cooking oil.
Pengaruh Konsentrasi Monomer Terhadap Pembentukan Poli Kuersetin Sebagai Zat Warna pada Dye Sensitized Solar Cell Putri, Yollanda Prissila; Hardeli, Hardeli
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118555

Abstract

Dye-Sensitized Solar Cell (DSSC) is a type of dye-based third-generation solar cell that functions as a photon absorber. Modifications were made to the quercetin dye to increase the double bonds, and the semiconductor used was done with TiO2 – ZnO doping. Doping can reduce the energy gap, thereby increasing the conductivity of TiO2. The TiO2 – ZnO layer was made by the doctor blade method on ITO glass and the dye was immersed in poly quercetin. The DSSC circuit is arranged to form a sandwich facing each other, between the working electrode and the counter electrode. DSSC efficiency can be tested from the results of resistance and voltage measurements on UV light with a power of 24 watt/m2 using a digital multimeter. The highest efficiency was produced at a monomer concentration of 2.5 grams of 9.4% from a long polymer chain.
Pengaruh Suhu Kalsinasi Sekam Padi Terhadap Produksi Silika (SiO2) Althof, Hasna Sausan; Beri, Deski
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124627

Abstract

Rice husk is a leftover material from the rice milling process and is known to have a high silica (SiO2) content. In this study, rice husk was calcined with temperature variations of 800℃, 850℃, and 900℃ to see the effect on the ash content produced. The ash obtained becomes whiter as the calcination temperature increases. The darker ash color indicates that there is still carbon content. In this study, silica was extracted using NaOH 10% and precipitated with HCl 10%. The synthesized silica was characterized using XRF. The results of the analysis using XRF revealed that the optimum calcination temperature was obtained at 900℃ which produced the highest silica yield of 96.32% with silica purity (SiO2) reaching 70.307%.

Page 27 of 35 | Total Record : 343

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