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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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Optimasi pH dan Ukuran Partikel Karbon Aktif dari Kulit Pisang Kepok (Musa balbisiana Colla) Terhadap Penyerapan Zat Warna Methylene Blue Ridho Hermawan; Edi Nasra; Ananda Putra; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Methylene blue is one of the textile industry wastes which can cause pollution to aquatic ecosystems. The threshold value for the permissible concentration of methylene blue in ambient waters (5-10) mg / L. So we need a method to treat wastewater contaminated with dye so that it is safe to dispose of and does not pollute the environment. One of the effective methods for removing dye waste is the adsorption method. The purpose of this study was to determine the optimum absorption conditions and maximum absorption capacity of methylene blue using activated carbon from the peel of a banana (Musa balbisiana Colla). In this study, using the Bacht method to adsorb methylene blue dye by varying the pH and stirring speed. The results of this study showed that the absorption capacity at the optimum conditions of pH 6 and a particle size of 250 µm was 5.4096 mg / g and the absorption percentage was 86.54%.

Pengaruh Pengadukan pada Degradasi Asam Humat Menggunakan Reaktor Mobile Heksagonal Fauzan Yan Hawari; Rahadian Zainul; Syamsi Aini; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Humic acid is a heterogeneous organic compound that is toxic, mutagenic and carcinogenic. This study goals to degrade humic acid using the photocatalytic method. The photocatalyst used for degradation is nano ZnO doped Cu 7%. The degradation process applies sunlight using a hexagonal mobile reactor and the light intensity is measured using a lightmeter. The degradation was carried out with variation of stirring at 500 rpm and without stirring at 1, 2, 3, 4 and 5 hours of irradiation. Result of degradation analysed using UV-Vis spectrophotometer. Result obtained the degradation using stirring has a higher percentage of degradation than without stirring. The percentage maximum of degradation obtained in study was 90,09% with 500 rpm stirring at 5 hours irradiation. In this study showed the effect of stirring on humic acid degradation using a hexagonal mobile reactor.

Karakterisasi Komposit Selulosa Bakteri – Ekstrak Daun Kacapiring (Gardenia Jassminoides J.Ellis) dengan Penambahan Crosslinker Muhammad Iqbal; Elsa Yuniarti; Ali Amran; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Bacterial cellulose (BC) can be applied in various fields such as biomedical, separation membranes, artificial blood vessels, and substrates for cartilage tissue engineering. Bacterial cellulose still has low mechanical properties, so a bacterial cellulose composite was formed with Gardenia Leaf Extract (CBC-GLE) to obtain higher mechanical properties. The purpose of this study was to determine the effect of adding crosslinker starch 1,2 and 3% soaked with CBC-GLE to form (CBC-GLEC) by knowing the mechanical, physical, and structural properties of (CBC-GLEC). Bacterial cellulose is produced from a mixture of coconut water, sugar and urea. Then fermented with Acetobacter Xylinum for 14 days. Bacterial cellulose was composited with gardenia leaf extract and was called the bacterial cellulose-gardenia leaf extract composite (CBC-GLE). BC, CBC-GLE and CBC-GLEC were characterized by testing water content, tensile strength, compressive strength, structural analysis using FTIR and degree of crystallinity using XRD. The addition of Crosslinker can reduce the percentage of water content of CBC-GLEC 3% with a value of 90.73%, CBC-GLE 95.69% and BC 99.21%. The best tensile strength test results were the addition of crosslinked amilum starch with a concentration of 3% (CBC-GLEC) with a value of 121.45 MPa, CBC-GLE 49.81 MPa and BC 32.09 MPa. The best compressive strength test results were the addition of starch crosslinker with a concentration of 3% (CBC-GLEC) with a value of 4.38 mm, CBC-GLE 3.42 mm and BC 2.65 mm. The results of the FTIR spectrum showed that the functional groups contained in cellulose only experienced a shift, while the results of the analysis of the degree of crystallinity showed that the percentage of the degree of crystallinity of BC was 75.47%, CBC-GLE 94.42 %, CBC-GLEC starch 3% was 67.26 %

Degradasi Zat Warna Methyl Violet dengan Katalis ZnO/Ag Menggunakan Metode Fotosonolisis Rahma Sari; Hary Sanjaya; Yohandri Yohandri; Ali Amran; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract – the photosonolysis method was used for the degradation of methyl violet in the sample solution using a ZnO doping Ag catalyst. This study aims to determine the effect of radiation time and the addition of Ag doping on ZnO catalyst on the degradation of Methyl violet. UV-Vis spectrophotometer was used to calculate the absorbance concentration of methyl violet before and after degradation while UV-DRS was used to measure the band gap value. The results showed that the highest percentage of Methyl violet degradation was 93.51% at 120 minutes using ZnO without doping. The highest degradation of methyl violet was at 90.50% using a 10% ZnO/Ag catalyst. the band gap obtained from the measurement of ZnO/Ag is 3.26%.Keywords: degradasi, Methyl Violet, ZnO/Ag, Photosonolysis, Band gap

Penentuan Kondisi Optimum Penyerapan Anion Kromat Pada Silika Termodifikasi Dimetilamina Vivi Chaniasi; Budhi Oktavia; Indang Dewata; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Heavy metal is the most dangerous was for the ecosystem because is not biodegradable, toxic, and carcinogenic even in a low concentration (ppm). It usually experienced some conditions such as not dissolved, precipitated, fused, absorbed, anorganic, reducer, oxidize, and free metal. One of the heavy metals that can cause negative effects for human and other living creature is Kromium Ion. The waste of the usage of Krom can damage the environment. Krom is a heavy metal that has dangerous affects that we have to be aware of. Krom (VI) on water was found 2 form od specieses, as an anion (Cr2O7)2- (In Acid solution) and anion (CrO4)2- (In Alkaline solution). One of the ways how to overcome Krom in a waste is by absorb it with an adsorbent, modified Silica DMA. It characterized with an electron microscope scanning, infrared spectrum, K2CrO4 adsorption from liquid solution which investigated in some pH level, contact time, K2CrO4 first concentration. The result of the experiment shows that modifying silica with DMA increases the adsorption capacity for Kromat. Langmuir Isotherm Adsorption resulting regression coefficient on Silica R2=0,8488, and for the modified Silica R2=0,9054. Kromat maximum adsorption capacity on 1,255 mg/g Silica and 2,26 mg/g modified Silica with first concentration of K2CrO4 100 mg/L can be reach on pH 2 with 90 minutes mixing process.

Sintesis Karbon Aktif Kulit Durian Serta Penyerapannya Terhadap Logam Berat Pb(II) dengan Metode Batch Devi Lestari; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Activated carbon from durian peel is synthesized by chemical activation using an alkaline sodium hydroxide. The carbonization process is carried out for 2 hours at a temperature of 320ºC. Activated carbon is characterized by conducting several quality tests based on SNI 06-3730-1995 which has met all specified standards. The results of the FTIR spectrum show that activated carbon has a cluster of -OH at wave numbers 3000-3400 cm-1, C = C at wave numbers 1540-1630 cm-1, C-O in wave numbers 1150-1275 cm-1. Adsorption test results by batch method showed that the prepared activated carbon was able to absorb Pb2+ ions at an optimum concentration of 280 mg/L and an optimum contact time of 150 minutes with an absorption capacity of 34,145 mg/g that was close to langmuir's isoterm equation by producing a regression coefficient value of R2 = 0.999.

Degradation of Methyl Green Dyes with ZnO Catalyst using the Photosonolysis Method Muhammad Gani Ariski; Hary Sanjaya; Alizar Alizar; Deski Beri; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Textile and dyestuff industrial dye waste remain the most difficult wastewater to treat due to the complex aromatic molecular structure of industrial dyes, which are very difficult to decompose. This research was conducted on the degradation of methyl green using the photosonolysis method. The purpose of this study was to determine the optimum time and amount of ZnO used in degrading methyl green dye. The results of the percentage degradation were obtained from the absorbance value measured using a UV-Vis Spectrophotometer. (λmax) Methyl green obtained from the measurement of a UV-Vis spectrophotometer was 640 nm. The results showed that the optimum irradiation and sonication time to degrade methyl green was 60 minutes with a degradation percentage of 92.77%. For the effect of mass variation of ZnO catalyst obtained the optimum mass of 0.05 grams with a degradation percentage of 96.38%.

Preparasi Karbon Aktif dari Sabut Kelapa dengan Aktivator Gelombang Mikro untuk Adsorpsi Rhodamin B Nahdatul Aulia; Miftahul Khair
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.v11i1.113364

Activated carbon from coconut husk has been prepared by using microwave assisted activation. Carbonization was conducted at mild condition of 250ºC for 105 minutes heating time. Optimum activated carbon is obtained by using microwave assisted activation at 300 watts of iradiation for 4 minutes contact time with iodine number is 779,7604 mg/g. Characterization of activated carbon using FTIR and proximate analysis (water content, vaporcontent, ash content, bound carbon content and iod absorption). Adsorption test showed that the prepared activated carbon was able to absorp Rhodamin B at the optimum concentration of 200 mg/L. Adsorption isoterm study conducted by Langmuir equation with a regression coefficient R2 = 0,9640 with a maximum absorption capacity of 2,923 mg/g. FTIR characterization showed that the activated carbon contains a fungsional groups O-H at wave numbers 3600-3200 cm-1, C=C at wave numbers 1500-1650 cm-1, and C-O at wave numbers 1300-900 cm-1.

Adsorpsi Zat Warna Rhodamine B Dengan Karbon Aktif Kulit Durian sebagai Adsorben Azhma Ulya; Edi Nasra; Ali Amran; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Rhodamine, B colorant is one of the dyes present in the waste coming from the textile/dyeing industry. Rhodamin B dyes found in waters can cause damage to ecosystems both animals and plants, so a method is needed to overcome the impact of pollution by Rhodamin B waste. One of the most efficient methods is the adsorption method using activated carbon from Durian peels. Adsorption,process is done by using a variation,of pH (2, 3, 4, 5 and 6), and variation of stirring speed (50, 100, 150, 200, 250 rpm). The results showed the absorption capacity at optimum conditions for the absorption of Rhodamine B at pH 4 and stirring speed at 200 rpm with absorption capacity of 24,643 mg/g with absorption percentage 96,0292%.

Identifikasi Gen 16S rRNA Bakteri Asam Laktat UBC-DTK-01 dari Dadih Azizah Azizah; Minda Azhar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Genotypic identification of bacteria is faster than phenotypic identification. This study aims to determine the group of lactic acid bacteria species from Tilatang Kamang Agam curd using the 16S rRNA gene. Bacterial chromosomal DNA was isolated using the kit wizard genomic DNA purification method. The 16S rRNA gene in chromosomal DNA was isolated by PCR method using BacF1 and UniB1 primers. The 16S rRNA gene fragment sequencing was carried out using the Dideoxy Sanger method. The sequenced nucleotide base sequences were analyzed using the BioEdit, BLASTn and MEGA X programs. The size of the 16S rRNA gene fragment of the bacterial isolate UBC-DTK-01 obtained was 1017 bp (base pair). The bacterial isolates belonged to the Enterococcus genus and Enterococcus faecalis species strain UBC-DTK-01.

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Contact Name
Budhi Oktavia

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budhioktavia@fmipa.unp.ac.id

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periodic@fmipa.unp.ac.id

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

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Kota padang,

Sumatera barat

INDONESIA