cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Dr. Sandra Hermanto, M.Si
Contact Email
hermantokimia@uinjkt.ac.id
Phone
+6285220042401
Journal Mail Official
kimia@uinjkt.ac.id
Editorial Address
Program Studi Kimia, Fakultas Sains dan Teknologi, UIN Syarif Hidayatullah Jakarta
Location
Kota tangerang selatan,
Banten
INDONESIA
VALENSI
Published by Universitas Islam Negeri Syarif Hidayatullah Jakarta
ISSN : 24606065     EISSN : 25483013     DOI : 10.15408/jkv
Core Subject : Science,
Chemistry
Jurnal Kimia Valensi is a biannual and peer-reviewed open access journal published by Department of Chemistry, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta. This journal covering all aspect of chemistry.
Arjuna Subject : Umum - Umum
Articles 15 Documents
 1   2 
Search results for , issue "Jurnal Kimia VALENSI Volume 8, No. 1, May 2022" : 15 Documents clear
Plastic Composites Using Mango Leaf Waste for Cost Effectiveness and Green Environment Rahmat Satoto; Rijal Ahmadi; Dadi Rusdiana; Erni Ernawaty; Anung Syampurwadi; Akbar Hanif Dawam Abdullah
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.24557

Abstract

Due to ecological considerations, natural biodegradation composites are widespread in tailoring plastics properties to specific needs. This work aims to demonstrate the available opportunity in using 100 and 140 mesh powdered mango leaf (PML) waste as a filler in polypropylene (PP) composites. Composites were produced via melt blending on a twin-screw internal mixer, with a different particulate size and a weight ratio of PML. Morphology, tensile, flexural, hardness, tear, puncture, thermal, and water absorption properties of the composites were assessed after 0, 1, 7, 14, and 28 days of water immersion. We found that the smaller particle size shows a better mechanical and water absorption of the composites, but not for thermal properties. The mechanical properties decreased with increasing PML content; however, these properties did not differ considerably from pure PP and other composites with natural filler. Besides, these polypropylene/PML composites showed excellent properties in water absorption.
Photodegradation of Indigosol Blue Dye Using TiO2/Natural Zeolite Photocatalyst Lulu’atul Hamidatu Ulya; Husnul Fatimah; Nasrul Alif
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.24558

Abstract

Indigosol blue is one of the dyes that has not been widely studied for photodegradation. This study aims to determine the photodegradation activity of indigosol blue using TiO2/Natural zeolite. TiO2 embedded in natural zeolite was synthesized using the sol-gel method. The synthesis results were characterized using X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), and UV-Vis Diffuse Reflectance Spectroscopy (DRS). The characterization of TiO2-zeolite obtained a bandgap energy of 2.62 eV that could be seen in the UV-Vis DRS spectra. UV light is used during the photodegradation process to irradiate TiO2-zeolite photocatalyst. The results show that the optimum mass of natural TiO2-zeolite photocatalyst was 0.02 g with a degradation percentage of 58.3%. The optimum radiation time was 30 min with a degradation percentage of 58.7%, and the optimum concentration of blue indigosol was 600 ppm with a degradation percentage of 58.7%. TiO2/Natural zeolite photocatalyst could degrade indigosol blue dye effectively at the optimum condition.
Isotherm and Kinetic Studies on the Adsorption Behavior of Metanil Yellow Dyes onto Modified Shrimp Shell-Polyethylenimine (SS-PEI) Rahmiana Zein; Zulkarnain Chaidir; Zilfa Zilfa; Syiffa Fauzia; Putri Ramadhani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22566

Abstract

The present study investigated the ability of modified shrimp shell by Polyethylenimine (PEI) for enhanced removal of metanil yellow. The modification was carried out using citric acid as a cross linker. The removal of metanil yellow by modified shrimp shell-PEI was conducted by batch method and investigated some parameters affected adsorption including pH, initial dye concentration, and contact time. The optimum conditions were achieved at pH 5, initial dye concentration 1200 mg/L, and contact time 90 minutes. The adsorption isotherm study showed that the adsorption of metanil yellow dye by modified shrimp shell-PEI followed the Langmuir isotherm model with a maximum adsorption capacity (qm) 121.951 mg/g. The kinetic study indicated that the adsorption process suited to the pseudo-second-order model. The characterization results revealed the differences in the adsorbent characteristics before and after the adsorption of metanil yellow dye. The cross-linked PEI onto shrimp shell provided more active sites (amine groups) to bind dye molecules. It can be concluded that modified shrimp shell by PEI has increased its ability in metanil yellow removal.
Synthesis, Characterization, and Preliminary Study of [Co(2- aminopyridine)2(NCS)2] or bis(2-aminopyridine)dithiocyanato cobalt(II) as An Antibacterial Asmi Munadhiroh; Husni Wahyu Wijaya; Nani Farida; Stéphane Golhen; I Wayan Dasna
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22685

Abstract

This study aims to synthesize complex compounds from the Co(II) ion with mixed ligands of 2-aminopyridine and thiocyanate ions. The complexes obtained have Co(II) : 2-aminopyridine: thiocyanate ratio of 1:2:2 based on preliminary analysis by SEM-EDX, DHL, and FTIR. The complex in the form of a blue needle crystal is stable at room temperature and melts at 169 °C. Characterization shows that the complex formed is neutral. The antibacterial activity test was carried out using the diffusion method and show that the resulting complex compounds could inhibit the growth of S. typhi and S. aureus bacteria better than 2-aminopyridine.
Improvement of PVA-Glucomanan-Acrylamide Hydrogel as Base Material of Immobilization Repita Sari; Sri Mulijani; Meri Suhartini
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.20332

Abstract

Hydrogel products are currently widely used in various fields, one of which is agriculture. Most hydrogels are made of synthetic polymers because they have good absorption but are not biodegradable. Glucomannan is a natural polymer that is able to absorb large amounts of water and biodegradable but it is difficult to maintain water content. One method to improve the mechanical properties of hydrogels is by modifying the hydrogels through the formation of an interpenetrating network (IPN) between natural polymers and synthetic polymers. In this study, the IPN hydrogel based on polyvinyl alcohol and glucomannan and acrylamide as a crosslinker was made by combining freeze-thaw and gamma irradiation techniques. The results showed that the hydrogel water absorption after immersion for 24 hours was 311.09% where the weight of glucomannan was 1 g and acrylamide was 0.75 g and the irradiation dose was 30 kGy. The result of cumulative release test of paraquat immobilized into the hydrogel was 12.00% within 10 days. This indicates that the PVA-glucomannan-acrylamide hydrogel can be used as a controlled paraquat release matrix so as to minimize the effect on the overuse of pesticides.
A Snapshot of Antibiotic Resistances in Air Particulate of a Provincial Capital City, Indonesia Sulfikar Sulfikar; Gotot Junarto; Muhammad Ardhias Syam; Andi Zulfikar Efendy; Mohamad Sahrir; Hilda Ningsih
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.24559

Abstract

Bacteria may become resistant to antibiotics due to gene mutation or adopting resistance genes from other bacteria via horizontal gene transfer. The existence of toxic substances to bacteria, such as antibiotics, biocides, and heavy metals, may influence the pathway into the genome. This study aimed to detect the presence of antibiotic-resistance bacteria in air particulates in Makassar - a provincial capital located in Indonesia with a low to moderate air quality index (AQI). We determined the correlations between antibiotic resistance (resistance rate, RR) and the heavy-metal concentrations in the air particulates. Air particulate samples were taken from seven locations in the summer (Dry Season: July - August 2019). We analyzed the concentration of As, Cu, and Zn of the air particulates and determined RR from presumptive Escherichia coli (E. coli) isolated from the air particulates. We estimated the RR towards five antibiotics with different mechanisms of action: amoxicillin-clavulanate, chloramphenicol, amikacin, norfloxacin, and trimethoprim. The concentrations of the heavy metals were relatively low, ranging from (µg/Nm3) 0.001 – 0.009 for As, 0.001 – 0.003 for Cu, and 0.007 to 0.783 for Zn. We observed different antibiotic resistance at various locations, ranging from 25% to 100% RR. While there were indications of possible antibiotic resistance patterns in the different areas sampled, the power of this perspective snapshot was insufficient to make statistically valid generalizations.
Synthesis Strategy of Cinnamaldehyde Derivate Compound from Cinnamon Bark Oil (Cinnamomum burmanii) to 2-hydroxycinnamaldehyde Vina Octavia Azzahra; Warsito Warsito; Elvina Dhiaul Iftitah; Desytrifa Rosenny Ompusunggu; Dwi Nanda Cakra Wiguna; Fadhil Akbar Sugiarto
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22686

Abstract

Cinnamaldehyde is the major secondary metabolite of Cinnamon (Cinnamomum burmanii) that has various benefits in medical fields. One of the cinnamaldehyde derivatives, 2-Hydroxycinnamaldehyde (HC), has been shown to have good anticancer activity. In contrast to its activity, the synthesis method of HC from pure cinnamaldehyde has not been studied before. This research studies the synthesis of HC with a semisynthetic approach from the natural ingredient cinnamaldehyde. This study was initiated by purifying cinnamaldehyde from cinnamon bark oil with the salting method using a saturated sodium bisulfite solution. Cinnamaldehyde is converted into HC through the synthesis design in three-reaction steps, including nitration using nitric acid-acetic acid anhydride at 0-5 °C, reduction in mild condition by reflux using NH4Cl-Fe in methanol-water solution, and diazotation-hydrolysis using NaNO2-HCl at 5 °C. Optimization of the synthesis was evaluated to get the best method according to yield and characterized using TLC, UV-Vis, FTIR, and GC-MS/LC-MS. The isolated CD has a purity of up to 100% with a yield of about 36%. The 2-nitrocinnamaldehyde (NC) product from nitration was analyzed with ethanol and n-hexane (1:1) Rf = 0.84 and showed high purity with a 26% yield. The reduction product 2-aminocinnamaldehyde (Rf = 0.48) and 2-hydroxycinamaldehyde (Rf = 0.19) as a product from diazotation-hydrolysis obtained in moderate yield.
Iron (II) Removal Using Activated Silica/Lignin Composite: Kinetic and Equilibrium Studies Atiek Rostika Noviyanti; Yati B Yuliyati; Ghaissani Nur Maulani; Irwan Kurnia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22715

Abstract

Recently, the Indonesian industry has been rapidly developed and affects the number of heavy metal ions waste such as iron (II). Iron (II) is dangerous to the environment because it is harmful to aquatic systems and carcinogenic. This research used activated silica/lignin to remove iron (II) in water. The activated silica/lignin was isolated from rice husk and activated by sodium periodate with a 10% weight of lignin in the range of pH of 2–5 at 55 °C. Then its specific surface area was analyzed with the methylene blue adsorption method. It is found that the condition in pH 2 showed the best isolation and activation condition to achieve the lowest impurity (cellulose and hemicellulose) in silica/lignin composite. Furthermore, the activated silica/lignin composite, isolated in pH 2, has a specific surface area of 366.6372 m2/g with the highest adsorption value of 1.1825 mg g-1 for iron (II) ions solution (5 ppm) within a contact time of 90 minutes. Moreover, the adsorption kinetics followed the pseudo-second-order kinetic model, also the adsorption isotherm fitted with the Freundlich model. This research showed that activated silica/lignin could be used as an alternative of environmentally friendly material for iron (II) removal in water.
The Effect of Acetonitrile Solvent on the Quantitative Determination of Europium (III) by Voltammetry and its Optimization using the Box-Behnken Design Uji Pratomo; Ari Hardianto; Yeni Wahyuni Hartati; Husein Hernandi Bahti; Santhy Wyantuti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22508

Abstract

There is often a drawback during the determination of Eu in aqueous solvents using the voltammetric method. The current signal from water can reduce that of the element, which causes difficulty while separating the Eu signal from other rare earth elements (REE). Therefore, this study used acetonitrile as a solvent due to its high electrical conductivity and wide potential range. The optimum conditions for the determination of Eu in acetonitrile using the Box-Behnken design include 74.56 seconds deposition time, 0.125 V amplitude modulation, and -2.0 V potential deposition. The platinum electrode's performance showed a recovery value of 98.91% and accuracy and precision (in %RSD) of 96.67% and 1.11%, respectively. Furthermore, detection and quantitation limits of 0.6 mg/L and 5.1 mg/L were recorded from the analysis. It concluded that the differential pulse voltammetry method was applied to determine the presence of Eu in acetonitrile.
A Nortriterpenoid and Steroid from the Stem Bark of Aglaia angustifolia Miq (Meliaceae) Ricson Pemimpin Hutagaol; Unang Supratman; Ihsan Rahadian; Srikandi Srikandi; Desi Harneti; Ace Tatang Hidayat; Khalijah Awang; Yoshihito shiono
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.23011

Abstract

A nortriterpenoid, 3-epi-cabraleahydroxylactone (1) and a steroid, stigma-4-en-3-on (2) were isolated from the n-hexane extract of  stem bark of Aglaia angustifolia Miq. Compound (2) was isolated for the first time from this Genus. The structure of both compounds were identified by spectroscopic datas including one and two-dimensional NMR as well as infrared spectrum, high-resolution mass spectrometric analysis and by comparing with those spectral data previously.

Page 1 of 2 | Total Record : 15

 1   2 

Filter by Year

2022 2022


Reset
Filter By Issues
All Issue Jurnal Kimia VALENSI Volume 9, No. 1, May 2023 Jurnal Kimia VALENSI Volume 8, No. 2, November 2022 Jurnal Kimia VALENSI Volume 8, No. 1, May 2022 Jurnal Kimia VALENSI Volume 7, No. 2, November 2021 Jurnal Kimia VALENSI Volume 7, No. 1, May 2021 Jurnal Kimia VALENSI Volume 6, No. 2, November 2020 Jurnal Kimia VALENSI Volume 6, No. 1, May 2020 Jurnal Kimia VALENSI Volume 5, No. 2, November 2019 Jurnal Kimia VALENSI Volume 5, No. 1, May 2019 Jurnal Kimia VALENSI Volume 4, No. 2, November 2018 Jurnal Kimia VALENSI Volume 4, No. 1, Mei 2018 Jurnal Kimia VALENSI Volume 3, No. 2, November 2017 Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017 Jurnal Kimia VALENSI Volume 2, No. 2, November 2016 Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016 Jurnal Kimia VALENSI Volume 1, No. 2, November 2015 Jurnal Kimia VALENSI Volume 1, No. 1, Mei 2015 Jurnal VALENSI Volume 4, No. 2, November 2014 Jurnal Valensi Volume 4, No.1, Mei 2014 Jurnal Valensi Volume 3, No.2, November 2013 Jurnal Valensi Volume 3, No.1, Mei 2013 Jurnal Valensi Volume 2, No.5, November 2012 Jurnal Valensi Volume 2, No.4, Mei 2012 JURNAL Valensi Volume 2, No. 3, November 2011 Jurnal Valensi Volume 2, No.2, Mei 2011 Jurnal Valensi Volume 2, No.1, November 2010 Jurnal Valensi Volume 1, No.6, Mei 2010 Jurnal Valensi Volume 1, No.5, November 2009 Jurnal Valensi Volume 1, No.4, Mei 2009 Jurnal Valensi Volume 1, No.3, November 2008 Jurnal valensi Volume 1, No.2, Mei 2008 Jurnal Valensi VOLUME 1, NO.1, NOVEMBER 2007 More Issue