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INDONESIA
Indonesian Journal of Chemistry
Published by Universitas Gadjah Mada
ISSN : 14119420     EISSN : 24601578     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).
Arjuna Subject : -
Articles 1,956 Documents
 144   145   146   147   148 
Fabrication of Chitosan/Fe3O4 Nanocomposite as Adsorbent for Reduction Methylene Blue Contents La Harimu; Sri Wahyuni; Nasrudin Nasrudin; Muhamad Jalil Baari; Dian Permana
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.65430

Abstract

Methylene blue (MB) is a dye in wastewater from textile industries that pollutes the water environment. Reduction of its content is necessary for protecting humans and the surrounding environment. This study fabricated chitosan/Fe3O4 nanocomposite through the mixture of chitosan from crab shell waste and magnetite (Fe3O4) from local sand iron with sodium tripolyphosphate (STPP)-sulfate crosslinker as an adsorbent to reduce methylene blue content. The obtained composite was characterized by Fourier Transform Infrared (FTIR) Spectrophotometer and X-Ray Diffraction (XRD) instrument. The contents of methylene blue before and after applying adsorbent-based nanocomposite were determined using an ultraviolet-visible (UV-Vis) spectrophotometer. FTIR characterization results show that chitosan and chitosan/Fe3O4 nanocomposite had successfully synthesized based on the typical vibrational peaks. The deacetylation degree of chitosan was 69.79%. Fe3O4, and chitosan/Fe3O4 nanocomposite, were confirmed by XRD patterns. The chitosan/Fe3O4 nanocomposite adsorption capacity reached 45.37 mg/g when adsorption occurred with 20 mg adsorbent, pH 9, and contact time of 1.5 h. Hence, the chitosan/Fe3O4 nanocomposite in this study has potency and is applicable to adsorb MB effectively.
Selection of the Parameters in the Synthesis of Ethylenediamine-Folate Using the Plackett Burman Design Erianti Siska Purnamasari; Linda Septiana; Ari Hardianto; Ukun Mochammad Syukur Soedjanaatmadja; Anni Anggraeni; Husein Hernadi Bahti
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68313

Abstract

This study is concerned with synthesizing ethylenediamine-folate (EDA-Folate), which will then be used as a precursor in synthesizing Gd-PEG-DOTA-Folate, a novel targeted-contrast agent for the diagnosis of cancer, employing the Magnetic Resonance Imaging method. This study aims to determine all the parameters affecting the synthesis of EDA-Folate using the Plackett Burman design. The synthesis method included activation of folic acid using dicyclohexylcarbodiimide and N-Hydroxysuccinimide to result in NHS-Folate, followed by conjugation of ethylenediamine with NHS-Folate to produce EDA-Folate. Analysis of the reaction product confirmed that the reaction product was EDA-Folate. From the resulted data, it can also be concluded that there were four significant parameters (out of the ten parameters studied) in the synthesis of EDA-Folate (with its value presented in the bracket), i.e., time inactivation of NHS-Folate (24 h), stirring rate inactivation of NHS-Folate (300 rpm), the mole of EDA (12 moles), and time of EDA-Folate (12 h). Moreover, the value or desirability of the experimental design was found to be 0.875 (which is < 1.0), meaning that the design will produce optimal conditions and thus the optimal yield of the reaction.
Optimization of High Yield Epoxidation of Malaysian Castor Bean Ricinoleic Acid with Performic Acid Nadia Salih; Jumat Salimon
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68592

Abstract

Epoxidized castor oil (ECO) has shown high potential for industrial applications as value-added products such as polymer coating, plasticizer, and biolubricant. Epoxidized ricinoleic acid recovered from ECO has potential for industrial usage. In this work, epoxidized ricinoleic acid (ERA) was synthesized through in situ generated performic acid epoxidation of ricinoleic acid (RA). The epoxidation process was optimized by several reaction parameters, such as the molar ratio of formic acid to ethylenic unsaturation, the molar ratio of hydrogen peroxide to ethylenic unsaturation, and reaction temperature. The response reaction parameters of oxirane oxygen content (OOC) and iodine value (IV) were then evaluated. The results showed the optimal condition for the epoxidation of RA was obtained at 50 °C, the molar ratio of formic acid and hydrogen peroxide to ethylenic unsaturation of 1:8:1 for 4 h reaction time. A high yield of ERA of 86% with relative conversion into oxirane of 85.3% was achieved at the optimum condition. The optimum ERA showed a high OOC value of 4.00% and a low IV value of 2.24 mg/g. It is plausible that ERA can be used as an intermediate starting material to prepare value-added products such as biosurfactants, biopolymer additives, or biolubricants.
Natural Magnetic Particles/Chitosan Impregnated with Silver Nanoparticles for Antibacterial Agents Annisa Afra Martha; Defia Indah Permatasari; Elma Retna Dewi; Nikho Asyoka Wijaya; Eko Sri Kunarti; Bambang Rusdiarso; Nuryono Nuryono
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68691

Abstract

In this research, silver nanoparticles (AgNP) impregnated on natural magnetic material/chitosan composite (NMP/Chi) have been conducted with different AgNP concentrations (0.5, 1.0, 1.5 mM). Their antibacterial activity was examined against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The AgNP samples were characterized with UV-Vis spectrophotometer and TEM. The NMP/Chi/AgNP samples were identified with FTIR and XRD, while NMP/Chi/AgNP1.0 (with the highest antibacterial activity) were analyzed with TEM and SEM-EDX. The antibacterial test with a well-diffusion method showed that NMP/Chi/AgNP was categorized as a strong antibacterial agent. The composite showing the largest inhibition zone diameters was NMP/Chi/AgNP prepared using 1.0 M AgNO3, namely 14.39 and 16.8 mm against E. coli and S. aureus, respectively. Characterization of AgNP1.0 showed a spherical shape with an average particle diameter of 17.9 nm in suspension and 32.4 nm in NMP/Chi. The presence of 1000 mg/kg NMP/Chi/AgNP1.0 composite in water was able to reduce the growth of E. coli and S. aureus bacteria by 60.4% (from 5.3 to 2.1 CFU/mL) and 71.6% (from 6.34 to 1.86 CFU/mL), respectively, within 5 h. The NMP/Chi/AgNP1.0 showed an effective antibacterial agent against both bacteria (E. coli and S. aureus) and could be applied potentially in aquatic environments.
Development of Arduino Uno-Based TCS3200 Color Sensor and Its Application on the Determination of Rhodamine B Level in Syrup Muhammad Syukri Surbakti; Muhammad Farhan; Zakaria Zakaria; Muhammad Isa; Elly Sufriadi; Sagir Alva; Elin Yusibani; Leni Heliawati; Muhammad Iqhrammullah; Khairi Suhud
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69214

Abstract

The use of the notorious synthetic dye, rhodamine B, in food and beverage products has been widely reported. This application urges the need to develop an analytical method that can provide reliable rhodamine B data with an easy operational technique. Therefore, this research is aimed to develop an Arduino Uno-based TCS3200 color sensor and study its application to determine rhodamine B levels in syrup. The design of the analytical instrument included TCS3200, an Arduino Uno microcomputer, an Integrated Development Environment (IDE) software, a black box container, and a 24 × 2 matrix display screen, where samples were prepared via absorption using wool thread. With a linear range of 1–20 mg/L, our proposed colorimetric sensor had recoveries of 96.25–110.3%, which was better compared to that was obtained from the UV-vis (81.8–100.6%) method. The detection and quantification limits of the sensor were 2.766 and 8.383 mg/L, respectively. The syrup samples used in this study were purchased from the local stores in Banda Aceh. Based on the proposed TCS3200 color sensor, the highest rhodamine B concentration from the syrup sample was 16.74 mg/L. The t-test analysis in this study revealed that the Rhodamine B levels quantified using the newly developed TCS3200 color sensor were not statistically or significantly different from the UV-Vis spectrophotometer method.
Adsorption of Bemacid Red by Poly Tetra (Ethylene Glycol) Dimethacrylate Crosslinked with 2-Hydroxypropyl Methacrylate Hydrogels: Equilibrium and Kinetic Studies Asmahane Fasla; Zoubida Seghier; Abdelkader Iddou; Laura Caserta
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69548

Abstract

Besides others, textile industries are the primary sources of discharging a massive amount of highly colored wastewater. Adsorption can be considered the most economically favorable technology method for removing dyes from wastewater. This paper reports the synthesis of Poly tetra (ethyleneglycol) dimethacrylate crosslinked with 2-hydroxypropyl methacrylate (Poly (TtEGDMA-cross-2-HPMA)) hydrogelsand its application as a novel sorbent to remove bemacid red (ET2) dye from aqueous solution under various operating conditions. The equilibrium adsorption capacity was found 142.82–883.60 mg ET2 g–1 of 1% TtEGDMA. The adsorbent was characterized using Fourier transform infrared radiation (FTIR) and 13carbon solid-state nuclear magnetic resonance spectra (13C-NMR). The effects of the experimental parameters include dye concentration and crosslinked agent concentration. The kinetic sorption uptake for ET2 by Poly (TtEGDMA-cross-2-HPMA) at various initial dye concentrations was analyzed by pseudo-first and pseudo-second models. Two sorption isotherms, namely the Langmuir and Freundlich isotherms, were applied to the sorption equilibrium data. The sorption kinetics of ET2 onto the hydrogels followed the pseudo-second-order kinetics model (R2 = 0.999) and the adsorption equilibrium data obeyed the Langmuir isotherm model (R2 = 0.999). It can be concluded that Poly (TtEGDMA-cross-2-HPMA) is an alternative economic sorbent to more costly adsorbents used for dye removal in wastewater treatment processes.
A Potential Approach for Converting Rubber Waste into a Low-Cost Polymeric Adsorbent for Removing Methylene Blue from Aqueous Solutions Muhammad Aliyu; Abdul Halim Abdullah; Mohamed Ibrahim bin Mohamed Tahir
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69674

Abstract

Exploiting waste materials to make cost-effective adsorbents and waste management methods are gaining more attention. In the current study, rubber wastes derived from dipping tank coagulum (DTC) in the glove manufacturing industry were converted into a novel polymeric-adsorbent via a simple sulfonation reaction with concentrated sulphuric acid and was used for the adsorption of methylene blue (MB) dye from aqueous solutions commonly found in contaminated waters. FT-IR, EDX, FESEM, and BET techniques were used to characterize the rubber waste before and after modification. The highest MB removal efficiency of 99.03% was achieved in the condition of initial concentration, adsorbent dosage, pH, contact time, and temperature were 15 mg/L, 30 mg, pH 7, 300 min, and 25 °C, respectively. The adsorption of MB was analyzed using experimental data fitted in a monolayer isotherms model with a maximum adsorption capacity of 119 mg/g. The kinetic model was revealed to agree with the pseudo-second-order kinetic model. Furthermore, SRW retained 90.45% of the removal percentage after four cycles of the repeated adsorption-desorption process. Conclusively, these findings suggest that rubber waste could be a suitable low-cost adsorbent to remove organic dyes from polluted water.
Assessment of Multi-Nutrients and Heavy Metals in Inorganic Fertilizers Widely Used by Indonesian Farmers Using NAA Sri Murniasih; Sri Juari Santosa; Roto Roto
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69908

Abstract

This research aims to determine the concentration of multi-nutrients and heavy metals and investigate the correlation among them in the seven inorganic fertilizers in Indonesia. Sample analysis was carried out using the NAA method. The highest concentrations of macro-nutrients were K (36.54 %) and Cl (18.09%) found in the KCl sample, while Ca (23.01%) was observed in the TSP sample. In the case of micro-nutrients, the highest concentrations of Se (0.36 mg/kg), Ti (597 mg/kg), Br (1.84%), and Ni (2.46 mg/kg) detected in the NPK sample. Meanwhile, the highest concentrations of Co (19.57 mg/kg) and Na (1.40%) were measured in the ZA sample, while Mg, with the highest concentration of 1.78%, was found in the KMgS sample. The micro-nutrients with the highest concentration detected in the TSP sample were Cr (45.96 mg/kg), Zn (342.6 mg/kg), and Mn (1331 mg/kg). Non-essential elements such as U, V, La, Sb, Sm, Th, Hf, Sr, Cs, Tb, Sc, Rb, Ta, and Eu were also detected in the fertilizer samples with the highest concentrations in the TSP sample. Statistical tests of multi-nutrient and heavy metals concentrations indicated that multi-nutrient and heavy metals in fertilizers are complex.
Synthesis and Cytotoxic Test of Halogen-Substituted Chalcone Against MCF-7 Breast Cancer Cells Eti Meirina Brahmana; Jamaran Kaban; Ginda Haro; Mimpin Ginting
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69991

Abstract

A series of chalcones was synthesized to be (E)-1-(4-chlorophenyl)-3-p-tolyprop-2-en-1-on (1), (E)-1-(4-chlorophenyl)-3-(4-tolyprophenyl) prop-2-en-1-on (2), (E)-1-(3-bromophenyl)-3-p-tolylprop-2-en-1-on (3), and (E)-1-(3-bromophenyl)-3-(4-isopropyl phenyl) prop-2-en-1-on (4) using irradiate microwave method with reaction time from 3, 6, and 8 min at 800 °C and 700 W. The compounds were characterized using TLC, UV-Vis, FTIR, 1H-NMR, and evaluated MCF-7 cancer cell cytotoxic test with Presto BlueTM. All compounds produced were in the form of yellow crystals. The results showed that compounds 2, 3, and 4 were potentially a Como prevention agent and inhibit cell proliferation with IC50 values of 37.24, 422.22, and 22.41 ppm, respectively. While compound 1 had IC50 1,484.75 and no cytotoxic effect. Further tests should be carried out for compounds 2, 3, and 4 against normal cells to measure the compound's safety for normal cells.
Codoping Effect of Nitrogen (N) to Iron (Fe) Doped Zirconium Titanate (ZrTiO4) Composite toward Its Visible Light Responsiveness as Photocatalysts Rizka Hayati; Rian Kurniawan; Niko Prasetyo; Sri Sudiono; Akhmad Syoufian
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.70146

Abstract

Iron (Fe) and nitrogen (N) were introduced as dopants into zirconium titanate (ZrTiO4) in order to study the codoping effects of nitrogen on iron-doped zirconium titanate (Fe,N-codoped ZrTiO4) composite. Titanium tetraisopropoxide (TTIP), zirconia (ZrO2), urea, and iron(II) sulfate heptahydrate were used as the source of TiO2, semiconductor supports, source of nitrogen, and iron, respectively. A specific amount of iron (1, 3, 5, 7, and 9 wt.%) and a fixed nitrogen content (10 wt.%) were doped into the ZrTiO4 lattice. Various calcination temperatures (from 500 to 900 °C) were also applied to investigate the crystal structure of the composite. The composites were characterized by X-ray powder diffractometer (XRD), Fourier-transform infrared spectrophotometer (FT-IR), scanning electron microscope with energy dispersive X-Ray spectrometer (SEM-EDX), and specular reflectance UV-Vis (SR-UV). The lowest bandgap energy of 2.62 eV was obtained in the composite with 3 wt.% of Fe and 10 wt.% of N calcined at 500 °C.

Page 146 of 196 | Total Record : 1956

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