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INDONESIA
Indonesian Journal of Chemistry and Environment
Published by Universitas Negeri Yogyakarta
ISSN : -     EISSN : 25993186     DOI : 10.21831
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Materials Science & Nanotechnology
Articles are welcome that deal with theoretical analysis, meta-anaysis reviews, and result of research or empirical studies from all aspect of Chemistry and Environment. Reports on new methodologies and comprehensive assessments of existing ones, as well as applications to new types of problems are especially welcome. Experimental papers are expected to be brought into relation with theory, and theoretical papers should be connected to present or future experiments. Manuscripts that apply routine use or minor extensions or modifications of established and/or published experimental and theoretical methodologies are appropriate if they report novel results for an important problem of high interest and/or if they provide significant new insights.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 73 Documents
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Effectiveness of Peanut Shell Activated Charcoal as Adsorbent of Chromium and Lead Metal Ions Using Continuous System Devi Heryanti; Susila Kristianingrum
Indonesian Journal of Chemistry and Environment Vol. 8 No. 1 (2025): JUNE 2025
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v8i1.88518

Abstract

This study aims to determine the characteristics of peanut shell adsorbents based on SNI 03-3730-1995, the optimum conditions, efficiency and adsorption capacity of Cr and Pb metals in textile industry waste (simulated waste), and the morphology of the adsorbents. Peanut shells were converted into activated carbon by carbonization in a furnace at 450 °C for 5 minutes, then ground and sieved to a 60 mesh particle size. The carbon was chemically activated using a 0.5 M NaOH solution for 24 hours. Adsorption experiments employed a continuous system with variations in adsorbent mass (0.3, 0.6, and 0.9 grams), flow rate (slow and fast), and simulated Pb:Cr ratios (1:1, 1:2, and 1:3 (v/v)). The characterization results of activated carbon include moisture content of 3.99%, ash content of 7.46%, volatile matter content of 53.88%, iodine adsorption of 355.32 mg/g, and carbon content of 74.497%. Surface morphology showed porous structure with a pore diameter of 919.34 nm. The optimal conditions for the adsorption of Pb and Cr metals were an adsorbent mass of 0.9 g, slow flow rate, and a simulated waste ratio of 1:2. Adsorption efficiency for Cr and Pb metals was 73.33% and 100%, respectively, with adsorption capacities of 14.2902 mg/g and 2.0286 mg/g.
Effectiveness of Peanut Shell Activated Carbon as an Adsorbent for Co(II) and Cu(II) Metals in Waste Water Using a Continuous System Hanifah, Rizka Aulia; Kristianingrum, Susila
Indonesian Journal of Chemistry and Environment Vol. 8 No. 1 (2025): JUNE 2025
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v8i1.88683

Abstract

This study aims to investigate the characteristics and performance of physic-chemically activated peanut shell adsorbent in reducing Co(II) and Cu(II) metal concentrations from textile industry wastewater. The activation process involved heating at 450°C and immersion in 0.5 M NaOH. Adsorbent characterization was conducted according to SNI 06-3730-1995 and analyzed using SEM-EDX. Adsorption was carried out in a continuous column system with variations in flow rate, adsorbent mass, and initial concentrations of Co(II) and Cu(II). The unactivated adsorbent had a moisture content of 3.11%, ash content of 5.54%, volatile matter of 64.01%, carbon content of 85.43%, and iodine adsorption of 261.68 mg/g. After activation, these values changed to 3.99%, 7.45%, 53.88%, 74.50%, and 355.32 mg/g, respectively. Optimum adsorption of Co(II) occurred at a flow rate of 0.0358 mL/s and 0.9 g adsorbent mass, while for Cu(II), the optimum was at 0.1282 mL/s and 0.9 g. The optimal volume ratio for both metals was 1:2 (v/v). Adsorption efficiency reached 78.34% for Co(II) and 99.98% for Cu(II), with adsorption capacities of 7.95 mg/g and 9.73 mg/g, respectively.
Synthesis of Methyl Citronellate through Fischer Esterification Reaction between Methanol and Citronellic Acid from Oxidation Product of Citronellal Wahyono, Joko; Budimarwanti, Cornelia
Indonesian Journal of Chemistry and Environment Vol. 8 No. 1 (2025): JUNE 2025
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v8i1.91039

Abstract

The purpose of this research was to synthesis methyl citronellate through Fischer esterification reaction between methanol and citronellic acid from oxidation product of citronellal and characterize the methyl citronellate of esterification product by TLC method, IR spectroscopy, and GC-MS. This research was started by oxidizing citronellal to citronellic acid using silver oxide (Ag2O) oxidator obtained from reaction between silver nitrate (AgNO3) with sodium hydoxide (NaOH) and oxidation reaction at temperature of 55-60oC for 35 minutes. Then, the oxidation product of citronellal was reacted with methanol through Fischer esterification reaction using concentrated sulfuric acid (H2SO4) catalyst at 46oC for 2 hours. The products of citronellal oxidation and esterification were identified using TLC, IR spectrophotometer, and GC-MS. The result of this research showed that the Fischer esterification reaction between methanol with citronellic acid from oxidation product of citronellal was produce methyl citronellate in the form of brownish yellow liquid and smelled fragrant. The result of methyl citronellate from esterification product characterization by using TLC method, IR spectroscopy, and GC-MS showed that the methyl citronellate has a purity of 17 % and a yield of 13.76 %.

Page 8 of 8 | Total Record : 73

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