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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 343 Documents
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Adsorpsi Ion Logam Cd2+ dengan Menggunakan Cangkang Telur Ayam Ras Nova Fitriani; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116127

Abstract

The growing industrial growth has resulted in more and more liquid waste containing heavy metals. Therefore we need a way to reduce these heavy metals. One way is adsorption using eggshells. The purpose of this study was to determine the optimum conditions for the adsorption of Cd2+ metal ions on the effect of variations in pH and stirring speed and to determine the adsorption capacity of eggshells for Cd2+ metal ions. This study used the batch method with variations in pH and stirring speed. The optimum conditions obtained from each variation were at pH 4, and stirring speed at 250 rpm. The adsorption capacity at the variation of pH was 2,3875 mg/g at 42,18% and adsorption capacity at variation in stirring speed was 3,3 mg/g at 24,01%.
Hedonic Test Method for Beef Rendang With Variations in The Addition of Cinnamomum Verum Sherly Rahmayani; Iryani Iryani; Iswendi Iswendi; Fitri Amelia
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.114883

Abstract

Rendang is one of the typical foods of the Minangkabaunese in West Sumatra. Many people like to consume rendang because rendang has a distinctive taste because in making rendang the type of meat, coconut milk and spices used greatly affect the aroma and taste produced. The purpose of this study was to determine the level of aroma, color, texture, and taste of beef rendang with variations in the addition of Cinnamomum verum. The hedonic test of beef rendang with variations in the addition of C. verum was carried out on 50 panelists. Panelists present 6 samples with 6 different sample numbers. Panelists were asked to rate how much preference there was for the product using a hedonic scale. The hedonic test results showed that the less C. verum added, the better the taste produced. As for the aroma and color, there is no significant difference among these products
Sintesis Nanopartikel Tembaga dari Larutan CuSO4.5H2O dengan Menggunakan Ekstrak Getah Merkubung ( Macarangan Gigantea) Warni Warni; Restina Bemis; Diah Riski Gusti
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.120712

Abstract

The synthesis of copper nanoparticles in this study used a reducing agent from the extract of mercurd gum with a solution of CuSO4.5H20. The results of the synthesis of copper nanoparticles using the extract of mercurd gum resulted in the color of the solution becoming clear greenish. The reaction time greatly affects the formation of copper nanoparticles, it can be seen visually that after 5  minutes the reaction shows a color change from clear to clear greenish and a lot of precipitate is formed. As the reaction time increases, the solution gets darker. The color of the copper nanoparticle solution tends to be clear to clear greenish, the clear color will continue to increase with the length of reaction time. In XRD analysis of Cu which has been synthesized from 0.01 M mercury extract solution. It can be seen that Cu nanocrystals have been formed which are indicated by the appearance of peaks at 2q : 18.76˚, 22.24˚, and 23.99, The results of the Scanning Electron Microscopy  analysis, the results of the SEM analysis in the study show that the particle sizes produced are different from one another and the distribution of particles is uneven, there are many particles that accumulate into chunks larger than other particles so that the size is not uniform and to form agglomerations. This is because the particle growth is very fast and UV-vis Confirmation of the formation of nanoparticles can be known through UV-Vis spectrophotometer observations by measuring the absorbance value in time intervals.
Degradasi Zat Warna Metil Violet Menggunakan Metoda Sonolisis Dengan Katalis ZnO-Ag Abdul Rafi Jelani; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116210

Abstract

Methyl violet is a dye that is often used in the textile industry. Methyl violet contains aniline which is toxic, mutagenic, and carcinogenic. These compounds cause cancer and gene mutations in living tissue. In addition, methyl violet is also difficult to degrade in waste so it requires serious handling. This study aims to determine the optimum time and optimum mass of ZnO-Ag catalyst against Methyl violet degradation by the sonolysis method. The absorbance value was obtained using a UV-Vis spectrophotometer. The results stated that the Methyl violet solution had a maximum wavelength of 582 nm. The maximum time to degrade Methyl violet with ZnO catalyst was obtained at 90 minutes with %D 85.917% and the maximum mass of catalyst to degrade methyl violet with 10% ZnO-Ag catalyst was obtained at 87.97% mass.
Adsorpsi Anion Nitrat Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina Anisa Nahari; Budhi Oktavia; Miftahul Khair; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115920

Abstract

Silica or silicon dioxide is a chemical compound with the molecular formula SiO2 which can be obtained from the synthesis of crystals, silica minerals, and vegetables. Compounds resulting from the polymerization of silicic acid, which are composed of a tetrahedral SiO4 unit chain with the general formula SiO2. Each silica atom is surrounded by four oxygen atoms. Silica forms a polyhedral network, where the bonds between oxygen tetrahendral are one and the other. Silica will form a framework that has pores that are quite open and allow other molecules to enter and undergo adsorption on the surface of the silica. Modification of silica is done by adding heat at a certain temperature, adding reagents to the active site of silica will change the silica functional group. Silica with the addition of amine compounds reacted with GPTMS can be used as nitrate anion adsorption to see the absorption capacity of silica against nitrate anions using the batch method. The factors used to see this adsorption capacity include pH at pH 7 with an absorption of 1.931463 mg/g and the percentage of absorption is 79.5%. and contact time with a time of 90 minutes with an absorption of 0.32677 mg/g and the percentage of absorption is 67.28785%.
Impregnasi ZnO Karbon Aktif dari Sabut Kelapa (Cocos nucifera L) Fotokatalis Untuk Degradasi Rhodamin B Rahayu Hardiani; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115842

Abstract

Research on increasing the degradation ability of AC-ZnO catalyst against Rhodamine B by impregnation on activated carbon from coconut fiber (Cocos nucifera L) has been carried out. Activated carbon is catalyzed by ZnO semiconductor catalyst by impregnation method. Impregnation was carried out by varying the addition of activated carbon (AC) 5%, 10%, 15%, 20% and 25% ZnO mass for 6 hours. The catalyst was calcined at 300 C for 105 minutes. For the results of the AC-ZnO adsorption test on Rhodamine B, the catalyst was tested on the degradation of Rhodamine B solution (10 ppm) with UV irradiation. obtained 89.76%. This shows that activated carbon from coconut fiber can support to increase the role of ZnO in the degradation of Rhodamine B. Characterization of the optimum degradation yield was carried out by FTIR. The characterization results showed that the ZnO catalyst was successfully formed.
Dedradasi Metilen Biru Secara Fotolisis Dengan Katalis Cdots Doping Au Septian Budiman; Hary Sanjaya; Isnaeni Isnaeni; Umar Kalmar Nizar; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115918

Abstract

The degradation of methylene blue was carried out by photolysis method with the help of a Cdots/Au catalyst. This study aims to determine the optimum concentration of dopen Au for Cdots and the optimum time for degradation of methylene blue with the help of a Cdots/Au catalyst. The photolysis method was carried out in a reactor equipped with 3 15 watt lamps with a UV wavelength of 254 nm. The absorption of methylene blue was measured using a spectrophotometer UV-Vis. The optimum Au dopen results were obtained at a concentration of 25 ppm with a degradation percentage of 39.94% and the optimum time for photolysis degradation was 6 hours of irradiation with a degradation percentage of 70.28%.
Pengaruh Penambahan Rempah Ketumbar (Coriandrum Sativum L.) Terhadap Cita Rasa Pada Rendang Daging Sapi Dengan Uji Hedonik Indah Dwi Putri; Iswendi Iswendi; Iryani Iryani; Fitri Amelia
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116016

Abstract

Coriander (Coriandrum sativum L.) is a spice known to have active ingredients, one of which is anti-cholesterol. Some regions use coriander as an ingredient in making beef rendang. The purpose of this study was to determine the level of preference for color, meat texture, seasoning texture, taste and aroma of beef rendang made using six variations of the addition of coriander rhizome, namely with levels: 0, 1, 2, 3, 4 and 5 grams/500 grams. beef. The organoleptic test method uses the hedonic test, namely the level of preference test with 40 panelists of UNP chemistry students 2020. The hedonic test results show that, the addition of coriander seasoning to beef rendang in general there is no significant change (p> 0.05) to the original rendang.
Optimasi Adsorpsi Ion Logam Cu2+ dengan Menggunakan Cangkang Telur Ayam Ras Nesya Febi Utami; Edi Nasra; Desy Kurniawati; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115915

Abstract

adsorption is a method of waste treatment that has the potential to remove toxic heavy metals. One of the factors that influence the occurrence of the adsorption process is the presence of a biological material called a biosorbent. The adsorption method is a method of absorbing heavy metal contamination in liquid waste that is very efficient and effective, as well as easy and cheap economically because of the use of biomaterials that are very cheap and can be regenerated. Chicken egg shell contains Calcium Carbonate (CaCO3) of 98.41% and has natural pores of 10,000 to 20,000 so it is estimated that it can absorb solutes. Based on the known mineral composition, chicken egg shells are composed of CaCO3 (98.41%), Ca3(PO4)2 (0.75%), and MgCO3 (0.84%). So it can be seen that chicken egg shells have a high calcium carbonate content, where calcium carbonate is a polar adsorbent. The optimum conditions for each variable in contacting broiler egg shells that have been activated with Cu2+ metal ions are optimum at pH 4, concentration of 250 ppm.
Silika Gel Termodifikasi Dimetilamin Sebagai Penyerap Anion Fosfat Delfitri Delfitri; Budhi Oktavia; Desy Kurniawati; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116103

Abstract

Silica gel is one type of dry silica gel which is widely used as an adsorbent. Silica has the ability to absorb because it has two active site groups that can be activated, namely a silanol group and a siloxane group. This modification was carried out to increase the ability of silica to absorb ions, one of which was phosphate anion. In waters, very high levels of phosphate anion can disrupt the marine biota ecosystem because it can cause uetrophication or decreased oxygen levels that enter the waters. The modifier compound used is dimethylamine (DMA). Silica and dimethylamine can bind to several linking compounds, namely glycidopropyltrimethoxylan (gptms). The modified silica was characterized by FTIR and the absorption results were analyzed using a UV-Vis spectrophotometer. The results of the comparison of the absorption capacity of phosphate anions after modification are greater than before modification, where the absorption capacity of silica before modification is 1,2601 mg/g with an absorption percentage of 54,46% and silica after modification is 1.9686 mg/g with an absorption percentage of 1,9686 mg/g. 85,08%.Keywords — Silica gel, Modification, Dimetilamine, Phosphate Anion

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