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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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Pemanfaatan Pati Ubi Jalar (Ipomoea batatas L.) Sebagai Bahan Baku Pembuatan Plastik Biodegradable dengan Penambahan Plasticizer Gliserol Vinezia Sri Wahyuni; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Research on the utilization of sweet potato starch (Ipomoea batatas L) as a raw material for making plastics biodegradable with the addition of plasticizer glycerol has been successfully carried out. The purpose of this study was to determine the effect of adding plasticizer glycerol to the mechanical, physical, biodegradable and structural properties of plastic biodegradable from sweet potato starch. This research is an experimental study by varying the amount of glycerol as much as 0 mL, 0.2 mL, 0.4 mL, 0.6 mL, 0.8 mL, and 1 mL. The process of making plastic is carried out at a temperature of 70 oC for 15 minutes. Based on the research that has been done, the results show that the more glycerol added, the greater the percentage value of water content and the ability of the plastic to be degraded. The maximum tensile strength was obtained from the addition of 0.4 mL of glycerol of 8.91 Mpa. Plastic biodegradable with the addition of 1 mL of glycerol degraded as much as 83.812% for 6 days. The FTIR spectra showed almost the same peaks between plastics without the addition of glycerol and with the addition of glycerol, the functional groups contained in the plastics included CH, OH, N-H, and C-O.

Adsorpsi Zat Warna Methylene Blue Menggunakan Karbon Aktif dari Kulit Durian (Durio zibethinus Murr.) Laura Dwi Rha Hayu; Edi Nasra; Minda Azhar; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i1.113349

Methylene blue is a basic dye that has cationic properties and used in the coloring industry. Adsorption using activated carbon from durian peel is proven to be able to absorb methylene blue. This study used the batch method which aims to determine the optimum conditions for absorption and maximum absorption of methylene blue using activated carbon from durian peel (Durio zibethinus Murr.). The absorption stages were carried out by varying the pH (2, 3, 4, 5, and 6) and the concentration. (40, 80, 120, 160, 200, 240 and 280) mg/L. The results showed that the optimum conditions occurred at pH 5 and a concentration of 240 mg/L with an absorption capacity of 28.647 mg/g and an absorption percentage of 99.66%. Mechanism the absorption of methylene blue follows the equation Freundlich isotherm with a determinant coefficient (R2) of 0,9874.

Identifikasi Senyawa Metabolit Sekunder Ekstrak Jamur Tiram Putih (Pleurotus ostreatus L.) Intan Apri Resti; Hesty Parbuntari
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Pleurotus ostreatus are fungi from the family of agaricaceae or a type of mushroom that grows in wood and is usually consumed by the Indonesian people and cultivated with a simple technique. Pleurotus ostreatus have a lot of nutrients and contain secondary metabolites that can affect the use of bioactive properties as drug compounds. In this study phytochemical screening was conducted to determine the secondary metabolite compound contained in Pleurotus ostreatus. The results of phytochemical screening show that Pleurotus ostreatus contain secondary metabolite compounds of alkaloids, steroids and saponins, but do not contained terpenoid and flavonoid compound.

Pengaruh Variasi Konsentrasi NaOH Sebagai Alkali Aktivator Terhadap Kuat Tekan Semen Geopolimer Berbasis Tanah Napa Aufa Rahmi; Mawardi Mawardi
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

In 1970, Davidovits had discovered an alternative binder called geopolymer. Geopolymers provide a solution to the disadvantages of Portland cement which are not environmentally friendly. Geopolymer is a material or binder material that is synthesized by mixing alumina silicate source material and alkaline activator solution. One of them is Napa land. Napa soil contains high levels of SiO2 and Al2O3 with percentages of 62.70% and 31.16% based on XRF test. NaOH solution mixed with Na2SiO3 was used as an activator whose concentration was varied from 8M to 14M. The ratio of the weight of Na2SiO3 to the weight of the NaOH solution is 1.5. The characteristics of the geopolymer cement based on napa soil showed that the analysis of optimum compressive strength was achieved at a concentration of 14M. Compressive strength test of cylindrical specimens, splitting test and porosity test were carried out comprehensively to compare the specimens from each composition. The higher the concentration of NaOH,the higher the compressive strength produced.

Pembuatan Plastik Biodegradable dari Limbah Cair Pengolahan Singkong dengan Penambahan Propilen Glikol sebagai Plasticizer Ivana Putri; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Cassava is a plant that used as a raw material for processing in many food industries in Indonesia. The results of this processing will produce cassava liquid waste. This cassava liquid waste can be used as raw material for making biodegradable plastics with the addition of propylene glycol as a plasticizer. Propylene glycol plasticizer was variated as much as 1 mL, 2 mL, 3 mL, 4 mL and 5 mL. The characterization test obtained a maximum value of 3 mL of propylene glycol plasticizer which has a tensile strength value of 68.24 N/mm2, an elongation percent of 42.04%, a maximum water content test and swelling test value of 5 mL which increases with the addition of a propylene glycol plasticizer. The value of biodegradation on the addition of 5 mL of plasticizer propylene glycol reached 76,789% on the 15th day. And the functional groups test of biodegradable plastics using FTIR, no other functional groups were found.

Pengaruh Rasio Na2SiO3/NaOH sebagai Alkali Aktivator Terhadap Hilang Pijar dan Kehalusan Butiran Semen (Blaine Analysis) Geopolimer Berbasis Tanah Napa Vira Nilmania; Mawardi Mawardi
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i1.113373

Geopolymer is a material or binder that synthesized by mixing alumina silicate source material and alkaline activator solution. One of the source materials for alumina silicate is napa soil that contained hight amount of SiO2 dan Al2O3 with percentage 62,70% and 31,16% of XRF analysis after calcination, that can be used as material based of geopolymer. The aims of calcination is to increase the surface area of the aluminasilica material so that it can increase the maximum solubility of aluminasilica by alkaline activator. This study reports lost of ignition and blaine analysis of napa soil-based geopolymer cement with variations in alkali activator ratio Na2SiO3/NaOH is 1, 1.5, 2, 2.5. The charactization of napa soil-based geopolymer cement indicated the optimum lost of ignition and blaine analysis on the ratio Na2SiO3/NaOH is 2,5 which is 6,63% and 725 m2/kg, it is higher than ordinary cement based on SNI with minimum blaine analysis is 280 m2/kg.

Degradasi Rhodamin B Menggunakan Katalis TiO2-N dan Oksidator Hidrogen Peroksida Cika Dania Marca; Rahadian Zainul
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

This research studies the degradation of rhodamine b with oxidator of hydrogen peroxide and determine how much time the optimum degrade rhodamin b as well as the percent degradation using the photocatalytic method. The photocatalyst used for degradation is TiO2-N 8%. The degradation was carried out with variation the concentrations of hydrogen peroxide 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% and 50% and the variation of irradiation time is 30, 60, 90,120, 150, 180, 210 and 240 minutes. Result of degradation analysed using UV-Vis spectrophotometer. The result showed that the greater the concentration of hydrogen peroxide added, the greater the percentage degradation of rhodamine b. The highest percentage degradation was obtained at 90,26% at the addition of hydrogen peroxide concentration 50% and the optimum time to degrade rhodamin b was 210 minutes with 86,5% degradation percentage with the addition of hydrogen peroxide.

Pengaruh KOH Sebagai Inisiator Pada Polimerisasi Tanin Terhadap Efisiensi Sel Surya DSSC Resi Gusmar Lina; Hardeli Hardeli
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i1.113559

Dye Sensitized Solar Cell (DSSC) is a solar cell that use dyes to absorb energy from sunlight which will be converted into electrical energy. The π bonds contained in the dye will absorb photons from sunlight, the number of π bonds can have an impact on the efficiency of the DSSC solar cell. Polymerization is a method used to multiply π bonds. In this research, the dye used is tannin because it has a conjugated π bond and is able to absorb photons from sunlight. Polymerized tannins (polytannins) will be used as dyes in DSSC. In the polymerization of tannins using KOH as an initiator which is a source of free radicals and is able to extend the polymer chain. The poly-tannins produced were characterized by using the Fourier Transform Infra Red (FTIR) instrument, indicating the formation of poly-tannins with the appearance of a methyl group (-CH2) at a wavelength of 2942.46 cm-1 which appeared in the tannin polymerization process. The optimum efficiency of DSSC produced using poly-tannin is 7.019% with a maximum concentration of 2% KOH.

Plastik Biodegradable dari Pati Buah Sukun Dengan Penambahan Plasticizer Gliserol Indah Nulfia; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Efforts were made to improve the quality of the use of breadfruit by processing it into a variety of products, increasing the economic value and better shelf life. The concentration of glycerol used was 0.4 ml; 0.8 ml; 1.2 ml; 1.6 ml; 2ml. The results of this study showed the greatest strength value was the addition of 0.4 mL glycerol with a tensile strength value of 21.72 Mpa and the elongation value at 0.4 mL glycerol 9.37%, the elasticity was 373.27 Mpa. Meanwhile, the water content and swelling test increased with the addition of glycerol plasticizer at the addition of 2 mL. biodegradation test on day 12 biodegradable plastic can be completely decomposed. In the FTIR test, no new functional groups were found.

Penentuan Kondisi Optimum Waktu Aging dan Temperatur Pengeringan Pada Sintesis Silika Xerogel dengan Bahan Dasar Natrium Silikat dari Silika Alam Elvina Yulistia Erwan; Budhi Oktavia
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract — Silica is one kind of porous material that is suited to adsorben. In the synthesis process, silica gel can be produced using a sol-gel method based on the sodium silicate (Na2SiO3), which is prepared by an acid. The project of this research is to establish optimum conditions in aging time and gel-drying temperatures to produce a broad surface and pore size for silica xerogel. Based on the iod's absorption of variations in aging time (14, 16, 18, 20 and 24 hours) and drying temperatures (60, 70, 80, 90 and 100°C) give the most absorption to optimum conditions of aging time at 18 hours and drying temperatures of 70°C. The presence of XRD pattern leads to amorphous nature structures that dilate at one peak in 2θ = 22.545°, which indicates synthesis of silica xerogel with a basic sodium silicate obtained from natural silica was successfully made and highly pure. Keywords — Silica, Sodium Silicate, Silica xerogel

Page 19 of 35 | Total Record : 343

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Journal Mail Official periodic@fmipa.unp.ac.id

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

Location Kota padang, Sumatera barat INDONESIA

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Contact Name
Budhi Oktavia

Contact Email
budhioktavia@fmipa.unp.ac.id

Phone
-

Journal Mail Official
periodic@fmipa.unp.ac.id

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

Location
Kota padang,

Sumatera barat

INDONESIA