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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 15 Documents
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Search results for , issue "Vol 1, No 1 (2012)" : 15 Documents clear
Analisis Kandungan Mangan (Mn) dan Tembaga (Cu) dalam Bijih Mangan di Daerah Taming Tonga Kecamatan Ranah Batahan Kabupaten Pasaman Barat Secara Spektrofotometri Serapan Atom Widya Pasema; Amrin .; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.501 KB) | DOI: 10.24036/p.v1i1.571

Abstract

A research on the analysis of Manganese and copper content in the manganese ore in the area Taming Tonga artifacts using atomic absorption spectrophotometry had been done. This study aims to determine the content of manganese (Mn) and copper (Cu) with variation of solvent, particle size variations, and solvent volume variations in atomic absorption spectrophotometry. This study uses a wet method of destruction, the destruction process is done with some variation of the solvent variation: concentrated HCl, concentrated HNO3 and HCl-HNO­3 concentrated (3:1), variations in particle size is ≤ 63 μm,> 63 - ≤ 75 μm, and> 75 - ≤ 90 μm and variations in volume 20 mL, 25 mL, 30 mL, 35 mL, 40 mL. The results of this study showed the highest manganese content in the samples obtained by using Aquaregia 30 mL that is 57 % with particle size ≤ 63 μm while the highest levels of copper in samples obtained by using a solvent which is 1,89 % HCl 25 mL with particle size ≤ 63 μm best.
Optimasi Proses Degradasi Metil Violet pada Reaktor Fotokatalitik Film TiO2-PEG Ika Sri Sulfiana; Hardeli Hamzah; Irma Mon
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.883 KB) | DOI: 10.24036/p.v1i1.553

Abstract

Methyl violet is one of triphenylmethane dyes which has been used extensively in various industrial application. Significant proportion of these dye enters the environment as wastewater. Photocatalytic degradation by using TiO2 under UV light irradiation has been shown to be potentially advantageous in the treatment of wastewater. This research was aimed to determine the optimum thin layers of catalyst and irradiation period of photocatalytic reactor. Modification by adding PEG was done to enhance TiO2 activity. A decrease in methyl violet concentration was analysed by using UV-Vis Spectrophotometer. GC-MS was used to ensure that there were a degradation indeed. Experimental results showed the optimum thin layers was reached in 8 times and  irradiation period was 5 hours. At this optimum condition, degradation percentage obtained was 79,03% with the initial concentration used was 10 mg/L and the flow rate was 110 mL/s. Identification by using GC-MS showed many peaks which proved there were degradation processes.
Studi Inhibisi Korosi Baja oleh Ekstrak Biji Kakao (Theobroma cacao) dalam Medium Asam Klorida Nurfitriana .; Irma Mon; Yerimadesi Busmairizal
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.884 KB) | DOI: 10.24036/p.v1i1.563

Abstract

Cocoa (Theobroma cacao) is one of the many plants contain catechin. Catechin can form a complex with iron, a complex is formed on the surface of steel and the complex adsorbed may block the entry of oxygen, ions Cl- ion and other corrosive, so the rate of corrosion can be slowed down. This research aims to determine the efficiency of inhibition corrosion of steel by cocoa extract in hydrochloric acid medium. The method used is based on the gravimetric, namely based on the reduction of weight (weight loss) of steel before and after with corrosion. Surface analysis the steel is done using stereo microscopes. Of research results obtained that the cacao seed extract may decrease the rate of corrosion of steel in hydrochloric acid medium 0.01 M with corrosion inhibition efficiency 76,21% and results analysis by FTIR spectrophotometer to layer on steel surface indicate a complex formed between Fe-catechin.
Optimasi Daya Degradasi Reaktor Fotokatalitik TiO2/SiO2 terhadap Zat Warna Methyl Violet Afrianty Ramadhani; Hardeli Hamzah; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.176 KB) | DOI: 10.24036/p.v1i1.543

Abstract

Penelitian ini bertujuan untuk menentukan laju alir dan lama penyinaran optimum reaktor fotokatalitik guna mendegradasi zat warna methyl violet. Dalam penelitian ini, TiO2 Degussa P 25 digunakan dengan penambahan SiO2 untuk mencegah terjadinya rekombinan antara e- dan h+. Variasi laju alir yaitu, 80 ml/s, 95 ml/s, 110 ml/s, 125 ml/s dan 140 ml/s, sedangkan variasi lama penyinaran yaitu, 1, 2, 3, 4, 5, 6, dan 7 jam. Setelah dilakukan proses degradasi, absorbansi methyl violet diukur menggunakan spektrofotometer UV-Vis dan produk degradasi yang terbentuk pada kondisi optimum diidentifikasi menggunakan GC-MS. Karakterisasi Kristal TiO2/SiO2 menggunakan XRD. Dari hasil penelitian didapatkan kondisi optimum reaktor fotokatalitik yaitu pada konsentrasi 10 ppm, laju alir 95 ml/s dan lama penyinaran selama 6 jam. Pada kondisi ini diperoleh persentase degradasi sebesar 81,020% dengan jumlah pelapisan yang digunakan sebanyak 5x dan banyaknya kolom gelas yang digunakan 11 buah.
Penentuan Kondisi Optimum Proses Degradasi Methanil Yellow Pada Reaktor Fotokatalitik TiO2/SiO2 Irene Praticia Irwan; Hardeli Hamzah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.104 KB) | DOI: 10.24036/p.v1i1.555

Abstract

Photocatalytic reactor is a device used to degrade organic pollutants. In this study, researchers used TiO2/SiO2 photocatalytic reactor to degrade dye yellow methanil 20 ppm. This study aims to determine the number of columns used glasses and long irradiation optimum TiO2/SiO2 photocatalytic reactor to degrade methanil yellow dye. In this study, the used TiO2 Degussa P-25 with the addition of SiO2 which aims to reduce pore size and extend catalyst surface thereby optimizing the photocatalytic activity of TiO2 films. Variations in the amount of glass columns used were 3, 5, 7, 9, and 11 columns. While the variation of irradiation time is longer irradiation are 1, 2, 3, 4, 5, 6, hours. After the process of degradation, absorbance was measured using a spectrophotometer methanil yellow UV-Vis and degradation products formed at the optimum conditions were identified using GC-MS. Characterization of TiO2/SiO2 crystals using XRD. The result showed the optimum conditions methanil yellow degradation at a concentration of 20 ppm in the photocatalytic reactor that is, the number of columns as much as 9 cups of fruit and a long column of irradiation for 4 hours. In this condition, the percentage obtained by degradation of 12.63% with a flow rate of 95 ml / s and as much as 5x the amount of coating coating.

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