Jurnal Periodic Jurusan Kimia UNP
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.
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<![CDATA[Pengaruh Waktu Polimerisasi pada Pembentukan Poli Asam Humat Terhadap Efisiensi Dye Sensitized Solar Cell (DSSC) ]]>
<![CDATA[Nindya Marsha]]>;
<![CDATA[Hardeli Hardeli]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110359
<![CDATA[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. ]]>
<![CDATA[Pengaruh Waktu Kontak Terhadap Penyerapan Ion Logam Cr+6 Menggunakan Biomassa Alga Hijau (Mougeotia sp) ]]>
<![CDATA[Diah Febriani Saputri]]>;
<![CDATA[Mawardi Anwar]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110144
<![CDATA[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.]]>
<![CDATA[EFEK KONSENTRASI LARUTAN NaCl TERHADAP KEMAMPUAN FOTOREAKTOR HEKSAGONAL BERBASIS PLAT CuO/Al ]]>
<![CDATA[Afria Yolanda]]>;
<![CDATA[Rahadian Zainul]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.109575
<![CDATA[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]]>
<![CDATA[Pengaruh Crosslinker Terhadap Pembentukan Poli Asam Humat yang digunakan sebagai Dye pada Sel Surya DSSC ]]>
<![CDATA[Kenanga Anzulmi]]>;
<![CDATA[Hardeli Hardeli]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110313
<![CDATA[Dye Solar Cell (DSSC) is a device capable of converting solar energy into electrical energy. DSSCs are solar cells that use natural dyes to absorb photons from solar energy. The dye used in this study was poly (humic acid) which was obtained from the polymerization of humic acid using TMPGDE as a crosslinker. Polymerization aims to increase the efficiency of the dye in absorbing photons so that the resulting efficiency is better. The ITO glass coated with TiO2 / Cu was made using the sol-gel method. DSSC is assembled to form a sandwich structure and DSSC efficiency is measured using a digital multimeter. UV-Vis analysis of polymerized dyes showed increased adsorption and batochromic shift from 219nm to 269nm - 301nm. The poly (humic acid) formed in the FTIR analysis was characterized by the presence of epoxy groups with peak characteristics of 808 cm-1798 cm-1 and 750 cm-1 and peaks of 1565 cm-1, 1375 cm-1 according to the ester. , carbonyl, and carboxylic acids due to the CH strain. Maximum efficiency of 7.5% at a crosslinker volume of 200 μL.]]>
<![CDATA[PENYERAPAN ZAT WARNA MALACHITE GREEN MENGGUNAKAN KULIT PISANG KEPOK (Musa balbisiana Colla) SEBAGAI BIOSORBEN DENGAN METODE BATCH ]]>
<![CDATA[Riva Silvia]]>;
<![CDATA[Edi Nasra]]>;
<![CDATA[Budhi Oktavia]]>;
<![CDATA[Sri Benti Etika]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.109616
<![CDATA[Biosorption of Malachite green dyes using kepok banana peel (Musa balbisiana Colla) as a biosorbent has been carried out. The purpose of this study was to determine the optimum conditions for absorption of Malachite green by kepok banana peel biosorbent (Musa balbisiana Colla). The method used is the batch method. The variables tested were pH of the solution, concentration, particle size. The wavelength of Malachite green is 618 nm measured by the UV-Vis Spectrophotometer. The results showed that the optimum conditions for absorption occurred at pH 3, a concentration of 100 ppm, and a particle size of 150 μm with an absorption capacity of 8,6778 mg/g. The adsorption isotherm of Malachite green with kepok banana peel (Musa balbisiana Colla) biosorbent tends to follow the Freundlich isotherm with a determinant coefficient (R2) of 0.9996.]]>
<![CDATA[Solidifikasi Logam Berat Cu(II) Pada Limbah Cair (Lumpur Berminyak dan Oli Bekas) Dengan Menggunakan Semen Portland ]]>
<![CDATA[Fany Fahran Jany]]>;
<![CDATA[Jon Efendi]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.109588
<![CDATA[Abstract- Very rapid development of the industry has led to increased levels of heavy metals in the environment. Heavy metals are the main group of inorganic pollutants that can contaminate wastewater in the environment. One of them is copper metal (Cu). Copper metal has a reddish brown color. This metal is very poisonous, and in high concentrations it can interfere with human health, such as damaging the respiratory system, mental disorders in children, cancer, death, and so on. This can be anticipated in various ways, one of which is the Solidification Method. The principle of the solidification method is to bind compounds in hazardous waste into insoluble / solid form and trap the waste in solids. The paramenter analysis used is the TCLP (Toxicty Characteristic Leaching Out Procedure) test. From the research data, it was found that the highest concentration of oily sludge was 0.19 mg / L and the lowest was 0.15 mg / L. In used oil waste, the highest concentration is 1.6 mg / L. From the solidification results of oily sludge and used oil waste, it can be concluded that the value of oily sludge waste is smaller than used The oil waste, and it can still be said to be safe to dispose of into the environment. The higher the cement solidification in the sample test, the higher the Cu content in the sample.]]>
<![CDATA[Pengaruh Konsentrasi Awal terhadap Penyerapan Ion Logam Cr+6 menggunakan Biomassa Alga Hijau Mougeotia Sp yang Diimobilisasi dengan Natrium Silika ]]>
<![CDATA[Mulya Dwi Arif]]>;
<![CDATA[Mawardi Anwar]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110164
<![CDATA[Mougeotia Sp green algae biomass is a biosorbent used in the absorption of heavy metals in industrial waste, because of the presence of functional groups that bind to heavy metal ions. However, it has one disadvantage: it is easily damaged by other microorganisms. To improve the physical and chemical properties of algae it is necessary to immobilize the sodium silica. This study aims to determine the maximum absorption and absorption capacity of Cr+6 metal ions by immobilized green algae Mougeotia Sp using sodium silica with a contact technique using a column and measured by Atomic Absorption Spectrophotometer (AAS). The data obtained showed that the interaction between metal ions and the algal biomass of Mougeotia Sp immobilized on sodium silica obtained the optimum concentration at 250 mg /L. The maximum absorption capacity is 7.5815 mg / g with absorption efficiency of 52.0653%. Furthermore, characterization using FTIR shows that functional groups with active mean are silanol and siloxane which are the binding sites for functional groups such as cacbixyl, carbonyl and amines. The biosorption of Cr + 6 metal ions using Mougeotia Sp green algae biomass immobilized with sodium silica fulfills the Langmuir isotherm equation with a regression coefficient (R2) of 0.9294.]]>
<![CDATA[Pengaruh Konsentrasi Awal Larutan terhadap Penyerapan Ion Logam Berat Cr3+ Menggunakan Biomassa Alga Hijau Mougeotia sp. Yang Diimobilisasi Pada Natrium Silika ]]>
<![CDATA[Helmi Susanti]]>;
<![CDATA[Mawardi Anwar]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110117
<![CDATA[Excessive heavy metal contamination in the environment can have negative effects on the environment and human health, one of which is the metal ion Cr3+. To overcome the increase in heavy metal ions, a biosorption method was used. Efforts made to increase the stability of biomass absorption are immobilization with sodium silica. Immoblization is the process of binding cells into the supporting matrix. The purpose of this study was to determine the optimum conditions for the absorption of Cr3+ metal ions, the initial concentration of the solution and the ratio of absorption to immobilized biomass. The results showed that the optimum absorption of Cr3+ metal ions occurred at the initial concentration of 250 mg/L solution and decreased with increasing concentration. The maximum absorption capacity obtained is 6.7409 mg/g. The biosorption of Cr3+ ions fulfills the Langmuir Isotherm equation with R2 of 0.898.]]>
<![CDATA[SINTESIS DAN KARAKTERISASI NANOPARTIKEL CaO SEBAGAI BAHAN PENGIKAT LOGAM BERAT ]]>
<![CDATA[Tika Indriani]]>;
<![CDATA[Jon Efendi]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.109587
<![CDATA[The increase in industrialization is in line with the increase in pollution of heavy metals that pollute the environment. Such waste needs to be managed properly for laws that are harmful to human health and the environment. Calcium oxide (CaO) is an exceptionally important industrial compound, which is used as toxic-waste remediation agent. Thermal decomposition method has some advantages such as simple process, low cost, ease of obtaining high purity product, etc. Characterization with the FTIR instrument showed the strong band at 3643 cm_1 corresponds to the O-H bonds from the remaining hydroxide. Bands at 1417 cm-1 and 866 cm-1 correspond to the C-O bond. The wide and strong bands at around 427 cm-1 and 553 cm-1 correspond to the Ca-O bonds. Characterization with the FTIR instrument showed the peaks were higher in intensity and narrower in spectral width, indicating that the products were of good crystallinity.]]>
<![CDATA[Pengaruh Penambahan Ekstrak Inulin Umbi Dahlia terhadap Karakteristik Organoleptik Sinbiotik Set Yoghurt ]]>
<![CDATA[Meri Novia Nurman]]>;
<![CDATA[Minda Azhar]]>;
<![CDATA[Fitri Amelia]]>;
<![CDATA[Budhi Oktavia]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v9i2.110304
<![CDATA[Synbiotic set yoghurt with the addition of an extract of inulin from dahlia tubers can increase the functional value of yoghurt. This study aims to determine the effect of inulin addition on the organoleptic characteristics of synbiotic set yoghurt. The method of research was the experimentation method. Synbiotic set yoghurt with the addition of an extract of inulin from dahlia tubers made by variation of the concentrations of 0.1%, 0.3% and 0.5%. Incubation was performed at 37°C for 20 hours . The organoleptic tests were conducted by 15 panelists on the color, aroma and texture of set yoghurt. Organoleptic data was processed using Wilcoxon test with significant level 95% (α = 0.05). Organoleptic set yoghurt showed that the addition of 0.3% inulin significantly affect the aroma of the yoghurt sour and the texture was more dense than the yoghurt comparison. The color of the set yoghurt produced slightly more white than the set yoghurt comparison, but no significant effect on α = 0.05. The results showed that the addition of 0.3% inulin dahlia tuber extract into the set yoghurt had a significantly affect the aroma and the texture of set yoghurt, and did not significantly affect the color of set yoghurt.]]>
