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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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Degradasi Methyl Orange Secara Fotosonolisis Menggunakan Katalis ZnO/TiO2 Nurhafizah Nurhafizah; Hary Sanjaya; Hardeli Hardeli; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract— The textile industry in Indonesia is increasing as a result of which more waste is produced, one of which is dye waste. The resulting waste has an impact on the surrounding environment. To reduce the impact caused by the waste, there are several methods used, one of which is degradation using photosonolysis method. In this study, the degraded dye was methyl orange using a ZnO/TiO2 catalyst with the photosonolysis method. This study aims to determine the optimum time and optimum doping of TiO2 in degrading methyl orange. The percentage of degradation was obtained from the absorbance value measured using a UV-VIS spectrophotometer. The maximum wavelength measurement result of methyl orange obtained is 463 nm. The result showed that the optimum radiation time to degrade methyl orange was 75 minutes with a degradation percentage of 60,568%. On the effect of the concentration of the ZnO/TiO2 catalyst, the optimum degradation percent was 27,317% at a concentration of 10%. For catalyst analysis using UV-DRS, the band gap value of ZnO/TiO2 was 10 % was 3,17 eV.

Pengaruh Suhu dan Konsentrasi Monomer Pada Polimerisasi Asam Tanat Sebagai Zat Warna Terhadap Efisiensi Dye Sensitized Solar Sel Agustini, Dwi; Hardeli, Hardeli
Periodic Vol 8, No 2 (2019): PERIODIC
Publisher : Jurusan Kimia FMIPA UNP

Dye Sensitized Solar Cell (DSSC) is a solar cell with a dye as an absorbent of photons from sunlight. Research related to DSSC is still ongoing to find DSSC components that produce high efficiency, but are easy and inexpensive to produce. Polymerization is a combined reaction of several monomers with certain rearrangements. The polymerized monomer is tannic acid which is an organic compound that has about 20 Ï€-Ï€ * bonds. The tannic acid produced is then used as a dye in the DSSC circuit. Assembled DSSCs are tested for voltage and resistance using a digital multimeter. The polymerized dyes were characterized using UV-Vis, FTIR. The results of the UV-Vis analysis showed that the batochromic shift occurred in the polymerized dye. The batochromic effect will cause more photons to be converted into electrical energy. The FTIR spectrum is used to confirm the formation of poly-tannic acid. The efficiency of DSSC with polymerized dyes was higher than that of non-polymerized dyes, which was 8.9%

Kelarutan Pigmen Anorganik Merah dan Biru Dalam Gelasi Mikroemulsi Water In Oil dari Sistem Air, (SDBS), dan Pentanol Untuk Tinta Ballpoint Suci Liani Murni; Ali Amran
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.v10i1.109570

Research has been carried out on the solubility of red and blue inorganic pigments in water-in-water microemulsion gelation from water systems, (SDBS), and pentanol for ballpoint inks. The method used is the sol-gel method by changing the microemulsion liquid into a gel by the sol-gel process at low temperatures. The formation of gels from microemulsion water in oil is done by the addition of tetra ethyl ortho silicate and ethanol. The amount of tetra ethyl ortho silicate added was 1: 8 mole ratio to the amount of water in a microemulsion of water in oil. The purpose of this study is to prepare gel from microemulsion water in oil, and determine the stability of the ink obtained based on the solubility test, density and refractive index of inorganic pigments in red and blue so that it can be applied to ballpoint inks. The measurement of the refractive index is done using the ABBE Refractometer. The results showed that the gel produced was semi-solid and had the ability to dissolve inorganic pigments larger and obtain solubility results in red inorganic pigments by 0.087 grams while the solubility of blue pigments by 0.026 grams.

PEMBUATAN KARBON AKTIF DARI LIMBAH CANGKANG KELAPA SAWIT (Elaeis guineensis) MENGGUNAKAN ULTRASONIK Tirta Suci Dhian Kasih; M Taufik; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Activated carbon from palm kernel shell has been prepared by using ultrasonic assisted activation. Carbonization was conducted at mild condition of 400ºC for 90 minutes heating time. Ultrasonic irradiation (35 Watt, 42 KHz) for 15 minutes increases the carbon iodine number from 452.4021 mg/g up to 817.4907 which is higher than SNI 06-3730-1995 requirement of mg/ g 750 mg/g for activated carbon. FTIR spectra results show that activated carbon has -OH groups at wave numbers of 3000-3500 cm-1, C = C at wave numbers of 1550-1650 cm-1, CO at wave numbers of 1000-1260 cm-1 and CH at wave numbers of 810- 770 cm-1 . Adsorption test results showed that the prepared activated carbon was able to absorb Pb+2 ion at the optimum concentration of 60 mg/L. Adsorption isotherm study conducted by Freundlich equation produces a regression coefficient R2 = 0.835 with a maximum absorption capacity of 11.0783mg/ g.

Pembuatan dan Karakterisasi Karbon aktif dari Pelepah Kelapa Sawit dengan Aktivasi Ultrasonik sebagai Adsorben Rhodamin B Fajar Sa'bandi; Syamsi Aini; Umar Kalmar Nizar; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The manufacture of activated carbon from oil palm frond waste using an ultrasonic wave activator has been successfully carried out. The carbonization process was carried out at a temperature of 250ºC for 90 minutes. Activation with ultrasonic waves (35 Watt, 40 KHz) for 30 minutes was able to increase the iodine number from 330.06 mg/g to 799.14 mg/g and was in accordance with SNI No.06-3730-1995. FTIR spectra show that the activated carbon of oil palm fronds has a functional group –OH at wave number 2900-3200 cm-1, C=C at wavenumber 1500-1600 cm-1, C-O at wavenumber 1200-1250 cm-1. The results of the adsorption test on Rhodamine B dye showed that the activated carbon produced had an optimum absorption capacity of 9.04 mg/g at a concentration of 400 ppm for 90 minutes. Studies show that the adsorption isotherms absorption mechanisms tend to follow the Freundlich equation with a correlation coefficient (R2)= 0.9861.

Katalis Asam Padat Berbasis Karbon Tersulfonasi Pada Proses Pembuatan Biodiesel Muhammad Hiknul Ikhsan; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Biodiesel is a promising alternative energy source in the future. The method of making biodiesel is the reaction of fatty acid esterification with methanol assisted by a catalyst. The catalyst that is widely developed in the process of making biodiesel is solid acid catalyst. Especially those based on sulfonated carbon. The purpose of this article is to explain the function and role of sulfonated carbon-based solid acid catalyst in the biodiesel production process. Solid acid catalyst is synthesized by sulfonation process of calcined carbon using sulfuric acid or chlorosulphonic acid. The advantage of using a solid acid catalyst is that the catalyst can be regenerated so that it can be used in several cycles. The use of solid acid catalysts can produce biodiesel with a fairly high conversion percentage. Keywords— biodiesel, solid acid catalyst, sulfonation, sulfuric acid, chlorosulfonic acid

PENGARUH KONSENTRASI AWAL LARUTAN ION LOGAM Cr+6 TERHADAP PENYERAPAN BIOMASSA ALGA HIJAU (Mougeotia sp.) YANG DIMODIFIKASI dengan METANOL Hervi Karlina; Mawardi Anwar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Heavy metals are dangerous that can pollute the environtment and cause health problems because they are toxic and carcinogenic, one example is the metal ion Cr+6. On eway to overcome heavy metal ion in waste is the biosorption method. This research was conducted to determine the absorption capacity of green algae (Mougeotia sp.) biomass modified with methanol and determine the effect of initial concentration of the solution of Cr+6 metal ion. The result showed that the optimum absorption of Cr+6 metal ion by green algae (Mougeotia sp.) biomass modified with methanol was at concentration of 250 mg/L. The maximum absorption capacity (qm) obtained is 5,1020 mg/g. Cr+6 metal ion biosorption using green algae (Mougeotia sp.) biomass modified with methanol fulfils the Langmuir Isotherm equation with a coefficient value (R2) of 0,955.

Penentuan Kondisi Optimum Pembentukan Natrium Silikat (Na2SiO3) Menggunakan Material Dasar Silika Alam dan Natrium Hidroksida (NaOH) Illa Ramadhani; Budhi Oktavia; Ananda Putra; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The purpose of this research are to investigate the effective synthesis of sodium silicate and knowing the optimum conditions of the sodium silicate from its solubility in water. Synthesis of sodium silicate was carried out by first activating silica using 1M HCl. The activated silica is then added with NaOH. Based on XRF analysis, it was found that the sodium silicate synthesis method is more effective at high temperatures. Determination of the optimum conditions was carried out at various concentrations of NaOH (2M, 3M, 4 M, 5M and 6M). Based on the research that has been done, the optimum conditions for sodium silicate were obtained by adding NaOH with a concentration of 4M.

Pengaruh Konsentrasi Elektrolit Na2SO4 Dalam Produksi Gas Hidrogen Menggunakan Sensor MQ-8 Dinda Sahara; Rahadian Zainul
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

This study aims to analyze the effect of variations Na2SO4 concentration in producing hydrogen gas using the MQ-8 sensor. The method used is electrolysis. The electrolysis process is carried out in a container called a dry cell generator. In this study the Cu and Al electrodes are used as a place for the reduction-oxidation reaction. The use of Cu / Al electrodes in dry cell generators is arranged using layered or sandwich techniques. The use of dry cell generator in the production of hydrogen gas by using the MQ-8 sensor as a measuring tool to calculate the concentration of H2 gas is able to produce a maximum concentration of hydrogen gas of 37 ppm.

Penentuan Derajat Polimerisasi Inulin dari Umbi Dahlia (dahlia sp.) Menggunakan Metode HPLC Dengan Detektor RID Basultan Hidayat; Minda Azhar; Iryani Iryani; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The degree of polymerization (DP) of inulin plays important rolein inulin utilization.This study aims to determine and compare DP of inulin from dahlia tubers that wereextracted in fresh and extracted after storaging in 15 days.Extraction of inulin is carried out based on its solubility in hot water.DP of inulin was measured using a High Performance Liquid Chromatography (HPLC) instrument with variety of measurement conditions. HPLC with RID detector, Hi-plex H Column, 100% aquabidest mobile phase, flow rate of 0.6 ml / minute, and injection volume of 20 µl gave the best measurement results. Dahlia tubers extracted in fresh produce fructose content 1.02%, while extracted after storaging in 15 days produce fructose content 1.71%.Hence, DP of inulin from dahlia tubers extracted in fresh is greater than DP of inulin from dahlia tubers extracted after storaging in 15 days.

Page 14 of 35 | Total Record : 343

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Contact Name
Budhi Oktavia

Contact Email
budhioktavia@fmipa.unp.ac.id

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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