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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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Pengaruh Waktu Kontak dan Kecepatan Pengadukan Terhadap Penyerapan Zat Warna Methylene Blue Menggunakan Biosorben Kulit Matoa (Pometia pinnata) Mufi Nasda; Desy Kurniawati; Edi Nasra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118347

Abstract

Methylene blue is an aromatic hydrocarbon compound or thiazine dye with the chemical formula C16H18N3SCl which is most often used in industry, this cationic dye is very dangerous with a threshold value ranging from 5-10 mg/L in water and is difficult to degrade in the environment because it contains benzene compounds. The purpose of this study was to reduce the impact of methylene blue pollution on the waters. The adsorption method was selected in batches by utilizing plantation waste from matoa fruit peel as an adsorbent in the absorption of MB waste, because it is more effective, inexpensive, and environmentally friendly. Matoa skin contains cellulose and lignin, so it is considered potential to be used as an adsorbent. The results showed that the matoa skin adsorbent was able to adsorb methylene blue dye at an optimum contact time of 120 minutes and a stirring speed of 200 rpm, which was measured using a UV-Vis spectrophotometer at a wavelength of 664 nm.
Penentuan Kondisi Optimum Desorpsi Anion Nitrat (NO3-) pada Silika Mesopori Termodifikasi Dimetilamina (DMA) Dipnorita Retno; Budhi Oktavia; Indang Dewata; Miftahul Khair
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118091

Abstract

Mesoporous silica is an inorganic materials that has high potential to be applied in various industrial fields, one of its application is the adsorption method. To maximize the adsorption of mesoporous silica, modification of the silica surface was carried out with the addition of amine compounds. The amine compound used as a modifier is dimethylamine (DMA). Mesoporous silica which has been modified with dimethylamine is used in the nitrate anions adsorption process by the column method. The adsorption capacity of the nitrate anion is 0.0917 mg/g. After being adsorbed, the desorption process was carried out to release the adsorbed nitrate anions again. From the desorption process, it was found that HCl proved to be the best desorption agent used on nitrate anions. The optimum concentration of HCl was 0.15 M with the number of  nitrate anions desorbed as much as 0.0459 mg with a 100% desorption percentage.
Pengaruh Supporting Electrolyte Pada Penentuan Formaldehida Secara Voltametri Siklik Menggunakan Pencil Lead Electrode (PLE) Modifikasi Lapisan Tipis Perak Putri, Yunisa Anugrah; Sari, Trisna Kumala; Oktavia, Budhi; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124516

Abstract

Formaldehyde was detected electrochemically using a pencil lead electrode modified with a thin layer of silver (Ag/PLE). Modification of the silver thin layer was carried out by sweeping-potential electrodeposition using the cyclic voltammetry method. This study aims to study the response of PLE and Ag/PLE for determination of formaldehyde and also to determine the optimum conditions of the supporting electrolyte used in the measurement of formaldehyde. The results showed that Ag/PLE provided better performance than PLE and 0.1 M KOH was the optimum supporting electrolyte. Measurement of formaldehyde using Ag/PLE electrodes with a concentration of 10 mM of test analyte. The oxidation peak of formaldehyde is present at a potential of 0.054 Volt.
Sintesis dan Karakterisasi Katalis Karbon Kulit Kolang-Kaling (Arenga Pinnata) Tersulfonasi untuk Produksi Biodiesel Dari Palm Fatty Acid Distillate Simbolon, Ranita; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.118699

Abstract

Indonesia is developing alternative energy, namely biodiesel. In producing biodiesel, catalysts are needed. One of the catalysts is a solid acid catalyst that can be synthesized from organic waste containing cellulose, hemicellulose and starch. The organic waste used in this study was a peel of sugar palm fruit. The purpose of this study is to determine the physicochemical properties of carbon catalysts from peel of sugar palm fruit that have been synthesized by calcination and sulfonation methods using H2SO4 and study some of the properties of biodiesel resulting from the esterification reaction between PFAD and methanol using a peel of sugar palm fruit sulfonated carbon catalyst. The synthesis of this catalyst uses a calcination method with a temperature variation of 250oC – 400oC and a sulfonation method using H2SO4. The resulting catalyst is characterized by FTIR, XRD and acid site. Then, catalysts are applied in producing biodiesel. The resulting biodiesel is tested for its biodiesel properties. The results of the study obtained that the highest number of acid sites in the carbon from the peel of sugar palm fruit was a calcination temperature of 300oC (K3-300) of 0.03538 mmol.g-1. The results of the FTIR characterization analysis showed that the sulfonate group was successfully substitution into the carbon surface which can be observed in the area of 1300-1000 cm-1. This area features two twin peaks that are characteristic of symmetrical and asymmetric sulfonate groups. Meanwhile, the result of XRD characterization is that the cholang-kaling skin catalyst forms a catalyst with an amorphous structure. The highest test results of the kolang-kaling skin acid site were at the optimum temperature, namely K3-300 of 0.03538 mmol.g-1. The K3-300 catalyst managed to convert the FFA percent to FAME by 48.33%.
Pemanfaatan Karbon dari Sabut Buah Nipah (Nypa fruticans) untuk Penjernihan Minyak Jelantah Istiqamah, Siti Sarah; Mawardi, Mawardi; Khair, Miftahul; Rahmi, Maulidia Arsyta; Novela, Riana; Pernadi, Niza Lian; Nizar, Umar Kalmar
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125419

Abstract

Along with the increase in the food and household industries, demand for raw materials for cooking oil continues to increase, causing shortages and increasing prices of cooking oil. This causes cooking oil to be used repeatedly. Cooking oil that has been used repeatedly is called used cooking oil which contains many carcinogenic compounds that can be harmful to health. Therefore, this research aims to purify used cooking oil using palm fiber carbon to improve the quality of used cooking oil. Nipa palm fiber contains hemicellulose and cellulose so it has the potential to be used as a carbon source using the calcination method and carrying out proximate tests such as ash content, vapor content and bound carbon content. Next, it is applied in the process of purifying used cooking oil using the adsorption method. After that, several properties of used cooking oil were tested, such as density, flow rate, acid number and saponification number. The results obtained in this research for the proximate test of palm fruit fiber at a temperature of 250-400℃ have met the SNI 06-3730-2021 standard. Nypa palm fiber carbon in used cooking oil was proven to reduce the density value to 0.81 g/mL, flow rate 4.17 mL/s, acid number 3.6 mg/KOH and saponification value 427 mg/KOH.
Studi Kompleks Asosiasi Logam Berat Timbal (Pb) dengan Menggunakan KI dan Methyl Green R, Yoanatul Hasanah; Nasra, Edi; Nizar, Umar Kalmar; Etika, Sri Benti
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118451

Abstract

The measurement methods in this study used are UV-Vis and AAS ( Atomic Absorption Spectrophotometer). The Pb(NO3)2 solution is dissolved with excess iodide so that it forms a PbI42- anion complex. This anion complex is then reacted with the cationic dye methyl green forming an association complex [PbI4][MG].The result of this study is that the maximum wavelength of the PbI42- anion complex is at 267 nm with stability time of 2 hours. Then the iodide concentration is 0,333 M with an absorbance 0.795 then the maximum wavelength of the association complex [PbI4][MG] is 636 nm at pH 5 and methyl green concentration is 0.00013% and has a concentration factor 20,39 times.
Kondisi Optimum Adsorpsi Ion Logam Ni2+ Oleh Silika gel-GPTMS Termodifikasi Sulfonat Ramadhani, Dwi; Oktavia, Budhi; Kurniawati, Desy; Etika, Sri Benti
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124480

Abstract

Silica gel is a compound that has two active sides, namely silanol (Si-OH) and siloxane (Si-O-Si) which have not been effective as adsorbents so modifications are made. Silica gel is modified using monosodium salt 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid which is reacted first with GPTMS (glycidoxypropyltrimethoxysilane) as a connecting bridge to produce sulfonate-modified silica gel-GPTMS adsorbent. The purpose of this modification is that sulfonate-modified silica gel-GPTMS are made to adsorb Ni2+ metal ions under optimum conditions at pH, contact time and concentration. The adsorption process is carried out using the batch method by seeing how much adsorbent adsorption capacity is made against the absorption of metal ions. The characterization used is an FTIR (Fourier Transform-Infrared) spectrophotometer in the analysis of the adsorbent manufacturing process and SSA (Atomic Absorption Spectrophotometry) to see the results of metal ion absorption. The results obtained according to research that has been conducted show the adsorption of sulfonate-modified silica gel-GPTMS against the absorption of Ni2+ metal ions at optimum conditions is at pH 3 and contact time for 45 with absorption capacities of 1.5265 mg/g and 1.5826 mg/g respectively.
Pengujian Aproksimat Karbon Pelepah Kelapa Sawit (Elaeis guineensis Jacq) Farras, Muhammad Sadiq; Putra, Ananda
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118338

Abstract

The carbon approximation test of palm frond has been successfully carried out. Carbon made at a temperature of 370 oC with variations in the length of time of 45, 60, 75 and 90 minutes was found to meet the test levels of SNI No. 06-3720-1995 and the best carbonization time for 75 minutes. Palm fronds are waste from palm plants that have no economic value and are even left to become garbage after being cut down. Therefore, proper handling is needed to manage palm fronds so that they are more useful in the environment and can have economic value later. That is to process palm fronds into activated carbon because they contain the main composition, namely cellulose, hemicellulose and lignin.
Optimasi Adsorpsi Ion Cd2+ Pada Silika Gel – GPTMS (glisidoksilpropoltrimetoksisilan) Termodifikasi Sulfonat Pebriani, Pebriani; Oktavia, Budhi; Nasra, Edi; Riga, Riga
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124279

Abstract

Adsorbents that are often used in the adsorption process are silica gels. Silica gel has unique advantages such as being, having ion exchange ability, being stable at high temperatures, not floating on organic solvents, and being easy to modify. But the effectiveness of silica gel adsorption against metal ions is weak, so it needs to be modified on the surface of silica gel. The modifier used is a sulfonate group derived from a 4-amino-5-hydroxy-2,7-naphthalenedisulfonate salt using a glycosidoxypropyltrimethoxysilane linkage (GPTMS). The purpose of this study is to determine the optimum conditions for the Cd2+ ion with variations in pH and contact time. The results of the study obtained optimal conditions for the absorption of the Cd2+ ion at pH 5 and a contact time of 60 minutes.
Analisis Sifat Fisikokimia dari Beberapa Minyak Kemasan Hasil Penggorengan Tempe Farhan, Muhammad; Azhar, Minda; Etika, Sri Benti; Pernadi, Niza Lian; Sabrina, Joya; Rahmi, Fathaniah Raviqa; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124341

Abstract

Cooking oil is one of the staple ingredients for cooking which is very popular in Indonesian society. The cooking oil most often used for cooking by the community is palm oil, because it is easy to obtain and has a relatively affordable price. But on the other hand cooking oil which is repeatedly heated at high temperatures can have harmful effects on the body, especially with the presence of solutes in the ingredients that are fried. This study aims to determine the quality of palm oil from tempe frying which contains vegetable protein for 1 hour at 160 C. The cooking oil is heated for 1 hour then put in the tempe and removed after it is cooked, after 1 hour the oil is cooled and its quality is tested by testing the density, flow rate, acid number and saponification number. The results showed that after cooking for 1 hour testing the tempe frying oil, the quality of the oil based on the quality standard value was bimoli, followed by pure essence and fortune. The quality of bimoli oil from tempe frying for one hour was with a density of 0.9233 gr/mL, a flow rate of 3.805 mL/s, an acid number of 8.0536 mgKOH/g and a saponification number of 16.091 mgKOH/g.

Page 26 of 35 | Total Record : 343

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