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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 2 Documents
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Search results for , issue "ARTICLE IN PRESS" : 2 Documents clear
Equilibrium, Kinetic and Thermodynamic Investigation of Adsorption of Hexavalent Chromium by Activated Carbon Derived from Leucaena leucocephala Seed Pod Yusuff, Adeyinka Sikiru; Nwosu, Chisom Joy
Indonesian Journal of Chemistry Article in press
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (67.342 KB) | DOI: 10.22146/ijc.34542

Abstract

In the present study, Leucaena leucocephala seed pod, a non-edible plant waste, was utilized to prepare low-cost activated carbon to remove hexavalent chromium [Cr(VI)] from aqueous solution via batch mode adsorption. The activated carbon was prepared by chemical activation with NaOH and characterized by Brunauer-Emmett-Teller (BET) surface area measurement, Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy. The effects of various variables, such as initial Cr(VI) concentration, contact time, adsorbent dosage, temperature, and pH, which influence the adsorption processes, were investigated. Equilibrium adsorption isotherms, the kinetic and thermodynamic behavior of the process were investigated. The obtained results showed that 100 min contact time, 1.0 g adsorbent dose, 45 °C temperature and solution pH of 6.0 resulted in maximum Cr(VI) uptake. The experimental data well fitted to the Langmuir isotherm with monolayer adsorption capacity of 26.94 mg/g. The kinetic analysis showed that the pseudo-second-order model well fitted to the acquired experimental data. The thermodynamic behavior of Cr(VI) adsorption onto activated carbon was found to be spontaneous and endothermic. The L. leucocephala seed pod based activated carbon was found to be efficient for Cr(VI) adsorption.
Antioxidant Flavonoid Glycoside from Leaves of Cacao Mistletoe (Scurrula ferruginea (Jack) Danser) Mai Efdi; Dara Pratama; Afrizal Itam; Tia Okselni
Indonesian Journal of Chemistry ARTICLE IN PRESS
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.72133

Abstract

Scurrula ferruginea (Jack) Danser is a folk medicine to treat several diseases. S. ferruginea is the mistletoe that lives by deriving nutrients from the host. Hence, the host has a significant effect on the biological activities and bioactive components of S. ferruginea. In this study, the leaves of S. ferruginea were macerated by methanol solvent to extract the chemical components and fractionated by hexane and ethyl acetate solvent, respectively, to separate organic compounds. The biological activity of crude extracts as the antioxidant was investigated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The result showed that the highest antioxidant activity was obtained from the ethyl acetate fraction with the IC50 of 10.88 ± 0.39 µg/mL. Furthermore, the trituration method used several solvents to isolate secondary metabolites from the initial crude methanol extract. This purification process produced a flavonoid compound of quercitrin. The antioxidant activity of quercitrin was also determined by the DPPH method. The result showed that this compound has stronger activity than the crude extracts with the IC50 of 5.95 ± 0.11 µg/mL. This study demonstrated that cacao mistletoe of S. ferruginea may have the potential activity to treat the diseases caused by the presence of free radicals.

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