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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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Pengaruh Waktu Polimerisasi pada Pembentukan Poli Asam Humat Terhadap Efisiensi Dye Sensitized Solar Cell (DSSC) Nindya Marsha; Hardeli Hardeli
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract— Dye Solar Cell (DSSC) is a solar cell that uses a dye as an absorber of photons from sunlight that will be converted into electrical energy. DSSC research continues in order to obtain DSSC components that will produce high efficiency, inexpensive and environmentally friendly. The number of π bonds in dyes affects the efficiency of DSSC, the more photons from absorbed sunlight will be converted into electrical energy. Polymerization is one of the methods used to increase π bonds in dyes. Polymerization is a combination of several monomers with repeated arrangements. The monomer used in this study is humic acid. Humic acid is an organic compound that has π bonds. Polymerization with humic acid will produce poly humic acid which is used for dyeing in DSSC. The assembled DSSC will be tested for resistance and voltage using a digital multimeter. The dyes will be characterized by UV-VIS and FTIR. UV-VIS test results showed a shift in the higher wavelength region and an increase in absorbance. FTIR characterization was performed to confirm the formation of poly humic acid which was characterized by the presence of formed ether / ester groups. The efficiency of DSSC using polymerized humic acid dye was obtained. The efficiency is higher than that of the humic acid dye which is not polymerized, ie an efficiency of 7,079%. Keywords— DSSC, Polymerization, Humic Acid, Poly Humic Acid.

Degradasi Zat Warna Metil Merah Dengan Katalis ZnO Menggunakan Metode Fotosonolisis Putri Ayu; Ananda Putra; Hary Sanjaya; Indang Dewata; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The research that has been carried out on the photosonolytic degradation of methyl red uses a ZnO as a catalyst which aims to determine the effect of time and catalyst mass on the degradation of methyl red. The time of degradation is about 30 to 150 minutes while about 0,05 grams to 2,5 grams of catalyst mass is used. The measurement results of the Uv-Vis spectrophotometer were obtained at a wavelength of 435nm with an absorbance 0,2471. In the variation of the degradation time, the highest result was obtained at 60 minutes which was 75,27%, while the ZnO mass variation carried out at the optimum time of 60 minutes obtained the highest results in the addition of 0,15 grams ZnO with the percentage of degradation (%D) of 47,79%. This study shown that hydroxyl radicals (∙OH) takes as a main control in degrading of methyl red.

Pengaruh Waktu Kontak Terhadap Penyerapan Ion Logam Cr+6 Menggunakan Biomassa Alga Hijau (Mougeotia sp) Diah Febriani Saputri; Mawardi Anwar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Chromium(VI) is a dangerous pollutant that the United States Envionmetal Protection Agency (US EPA) has identified as disturbing humans because of its toxicity. Even Cr (VI) is one of the most common pollutants is at number three in waters near industries. For this reason it is necessary to limit and overcome Cr (VI) in the waters. Biosorption is present as an alternative that can remove pollutants in waters by utilizing abundant natural materials. Green alga is one the natural materials used for biosorption. This is because the functional groups that exist on the surface of the cell walls play an important role in binding metals such as amides, amines, hydroxyl, carbonyl and carboxyl. This research was conducted using the Batch method with variations is contact time. The result showed that the optimum condition of contact time was 60 minutes with adsorption of 4,122 mg/ g.The characterization of green algae (Mougeotia sp) using FTIR was carried out to see the functional groups that play a role in adsorption Cr+6.

Optimasi pH dan Konsentrasi Kopresipitan pada Proses Kopresipitasi Ion Cd2+ menggunakan Al(OH)3 Febri Andini Putri; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Heavy metal in water content may cause serious harm to health and environment. Cd2+ as the one of trace elements contained in water poses certain challenges to be measured and handled properly. Coprecipitation of Cd2+ with Al(OH)3 as coprecipitant is characterized by Atomic Absoprtion Spectrophotometry accoording to Beer's Law. Optimum condition of this process is obtained by varying pH of the solution and coprecipitant concentration. The result indicate pH of 9 and Al3+ concentration of 0,2 M as the optimum conditions, with Cd2+ absorbed to 0,749 ppm.

Sistem Fotoreaktor Elektrolit Biner, Terner, dan Kuarterner Berbasis Elektroda Cu Serabut ike sabaria; Rahadian Zainul
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Solar cell (photovoltaic cell) is a device that has ability to convert sunlight energy into electrical energy by applying the photovoltaic principle. The photovoltaic principle is defined as a phenomenon of the appearance of an electric voltage due to the contact of two electrodes connected to a solid or liquid system when exposed to solar light. This study aims to determine the maximum power generated from the photoreactor, determine the effect of concentration variations and determine the efficiency of the photoreactor. The method in this study is an experiment using the photovoltaic effect on a photoreactor with CuO / Al electrodes and electrolytes of sodium chloride, sodium hydroxide and aluminum hydroxide. The variables in this study were measurement time and concentration. The variations in the concentration of sodium chloride, sodium hydroxide, and aluminum hydroxide electrolytes used were 0.25 M; 0.5 M; 0.75 M; and 1M. Current and voltage measurements are carried out 3 hours a day for 5 measurement days. The results showed that the optimum concentration was at a concentration of 0.75 M. The maximum power obtained was 0.0184 mWatt in NaCl solution, 0.072 mWatt in Na2SO4 solution and 0.224 mWatt in Al(OH)3 solution, the ability of the electrodes to produce electricity per area of each NaCl 0.00688mWatt / m2, Na2SO4 0.00263 mWatt / m2, Al(OH)3 0.00486 mWatt / m2 with the electrode cross-sectional area used is 0.0183m2. As well as the maximum efficiency of NaCl, Na2SO4, Al(OH)3 obtained is 0.8339%, 0.318% and 0.5890%. From the research results obtained: The greater the concentration of binary, ternary and quaternary solutions, the greater the power produced.

Pengaruh Waktu Kneading Terhadap Efektifitas Enkapsulasi Molekul Minyak Esensial Daun Ruku-Ruku (Ocinum tenuiflorum) pada β- Siklodektrin (β-CD) Elfanny Delvia; Sri Benti Etika; Hesty Parbuntari
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The leaves of ruku-ruku (Ocinum Tenuiflorum contain secondary metabolites in the form of essential oils which can be used as medicinal compounds. Ruku- ruku essential oil (Ocinum Tenuiflorum) is useful as an aromatheraphy, cosmetic ingredient, antibacterial, anti-inflammatory and as an anticancer, however essential oils are unstable, susceptible to high temperatures, and easily oxidized. For that we need encapsulation with a coating material that can provide a solution to these problems. β-siklodekstrin is a good coating for essential oil encapsulation. Research has been conducted to prevent the disruption of inclusion complexes with vrying stirring time. FT-IR analysis showed that there was a shift in wavelength between the parent molecule β-siklodekstrin and the inclusion complex, namely an increase in the inclusion complex resulting in a widening of the absorbance band. The stability of the inclusion complexes formed can be seen from the melting point of the inclusion complex which is almost close to the melting of β-siklodekstrin cyclodextrin (> 290ºC), the melting point of the inclusion complex with variations in the stirring time of 15 minutes, 30 minutes, and 45 minutes respectively 287ºC, 280ºC, dan s278ºC. This high melting points indicates a stable inclusion complex that does not break down easily.

Pembuatan Karbon Aktif Melalui Karbonisasi Batang Kelapa Sawit Delviana Dwi Jaya; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Providing low cost activated carbon from oil palm trunk waste is beneficial to compete with low-cost non-halal sources. This research aims to produce low cost and easy preparation of activated carbon from oil palm trunks with employ carbonization process only. With an optimum carbonization temperature of 250 oC for 150 minutes of heating time, the results of the carbonization of oil palm trunk could fulfill the proximate analysis (yield, air content, ash content, carbon content, and iodine numbers) required by Indonesian National Standard SNI 06-3730-1995 for activated carbon. The proximate analysis obtained is a yield of 50.95%, the air content of 5.71%, ash content 6.57%, the carbon content of 18.55%, carbon content increased of 74.88%, and number rs iodine of 401,6537 mg/g.

Analisis XRD dan Leaching Out dari Solidifikasi/Stabilisasi Ion Logam Cr(VI) Menggunakan Semen Shinta Bella; Jon Efendi
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Cr (VI) metal waste becomes one of the heavy metal wastes which is very difficult to overcome. For this reason, the Cr (VI) waste processor uses a stabilization / solidification method to reduce the concentration of Cr (VI) metal ions in the environment by using cement as a binder. The testing setting time for cement is that by increasing the Cr (VI) concentration, the longer it takes for the cement hardening process. This is in line with the results of the compressive strength test, where the results for concentrations of 0.5%, 2%, and 5% were 32, 26, and 23 MPa, respectively. whereas according to the US EPA, the minimum compressive strength test is 0.3 MPa. TCLP test for 96 hours for this method is that the higher the concentration, the higher the Cr (VI) leaching in cement.

EFEK KONSENTRASI LARUTAN NaCl TERHADAP KEMAMPUAN FOTOREAKTOR HEKSAGONAL BERBASIS PLAT CuO/Al Afria Yolanda; Rahadian Zainul
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.v9i2.109575

A solar cell (photovoltaic cell) is a device that has the ability to convert sunlight energy into electrical energy by applying the photovoltaic principle. The photovoltaic principle is defined as a phenomenon of the appearance of an electric voltage due to the contact of two electrodes connected to a solid or liquid system when exposed to sunlight. This study aims to determine the maximum power generated from the photoreactor, determine the effect of concentration variations and determine the efficiency of the photoreactor. The method in this study is an experiment using photovoltaic cells in the form of a hexagonal photoreactor with a size of 3x70x400 mm and a concentration variation of 0.25; M 0.5 M; 0.75 M; and 1 M. The variables in this study were the time of measurement and concentration. Current and voltage measurements are carried out 5 hours a day for 3 days of measurement. The results showed that the optimum concentration of sodium chloride was at a gelation concentration of 0.75 M. The measurement time that produced the maximum power was at 13.00 WIB, then the stability of the solar cells on day 2.The maximum power obtained was 0.0288 mWatt and the ability of the electrodes to produce electricity per area is 11.8907 mWatt / m2 with a cross-sectional area of the electrode used is 0.0183 m2. And the maximum efficiency obtained is 1.0034%. From the research results obtained: The greater the concentration of sodium chloride, the greater the power produced

Degradasi Zat Warna Methylene Blue dengan Katalis ZnO-CuO Menggunakan Metode Fotosonolisis Nilam Nilam; Hary Sanjaya; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Photosonolysis method has been done to degrade Methylene blue in the solution. This study aims to determine the effect of radiation time and concentration of doping CuO. The absorbance of the samples was measured with a UV-Vis spectrophotometer. The maximum time to degrade Methylene blue using a ZnO catalyst was obtained at 120 minutes with percentage degradation 87,95%. The maximum doping concentration of CuO on the ZnO catalyst for 120 minutes was obtained at ZnO-CuO 20% catalyst with percentage degradation 90,33%. Analysis of catalyst characterization with a UV-DRS spectrophotometer obtained a band gap value of 3.30 eV.

Page 9 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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Journal Mail Official
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