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All Journal KOVALEN: Jurnal Riset Kimia Jurnal Penelitian Sains
Faradin, Faradin
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Chemical Engineering, Chemistry & Bioengineering Chemistry Mathematics Physics

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Optimalisasi Limbah Serbuk Gergaji Kayu Jati (Tectona grandis L.f) Sebagai Adsorben Logam Berat Kobalt (Co) dengan Metode Aktivasi Kimia: Optimization of Teak Wood Sawdust Waste (Tectona grandis L.f) as Heavy Metal Adsorbent of Cobalt (Co) by Chemical Activation Method Faradin, Faradin; Muharti, Asti; Dinafa, Nazwa Jinanti; Widiyanto, Holisha
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 2 (2024): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i2.16629

Abstract

Teak wood (Tectona grandis L.f.), a high-quality wood commonly used in Indonesia, specifically in the Cilegon area, has the potential to be used as an alternative to reduce environmental pollution. This research aimed to test teak wood sawdust waste as an adsorbent for cobalt heavy metal, create activated charcoal from the sawdust waste for the same purpose, and determine the optimal conditions for treatment with and without chemical activation. Industrial waste samples were found to contain 50.7 ppm of cobalt metal through ICPS testing. Activated chemical adsorption, without activation and with industrial wastewater mixture, resulted in a decrease in cobalt metal concentration by 78.2% or 11.08 ppm. The optimal conditions for activated chemical adsorption were found at a pH of 5, an adsorbent mass of 600 mg, and a time of 40 minutes, resulting in decreases of 60.9% (21.2751 ppm), 71% (15.7821 ppm) and 67.7% (17.5812 ppm), respectively. The results show that teak wood sawdust waste can effectively adsorb cobalt heavy metal, providing a potential solution for industrial wastewater treatment.
Analysis of Total Polyhenolic Content and Antioxidant Activity from n-hexane, Ethyl acetate and Ethanol Extract of Kitolod (Hipobbroma longiflora) Leaf Situmeang, Boima; Faradin, Faradin; Susvira, Dian; Bialangi, Nurhayati; Widiyanto, Holisha; Yulianti, Nani; Jinanti, Nazwa
Jurnal Penelitian Sains Vol 27, No 2 (2025)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v27i2.1182

Abstract

Isotoma longiflora, commonly known as Kitolod, has been traditionally used as a medicinal plant for treating various ailments. This study aims to extract Kitolod leaves using three different solvents with varying polarities: n-hexane (non-polar), ethyl acetate (semi-polar), and ethanol (polar). The total phenolic content, total flavonoid content, and antioxidant activity were analyzed using a spectrophotometer. The trends observed in both TFC and TPC results indicate that ethyl acetate is the most effective solvent for extracting bioactive compounds from Kitolod leaves. The ethyl acetate extract of Kitolod leaves exhibited the highest antioxidant activity (150.542 ± 3.917 ppm), followed by the ethanol (157.235±0.858 ppm) and n-hexane (217.345 ± 1.749 ppm) extracts. This suggests that ethyl acetate is the most effective solvent for extracting bioactive compounds with antioxidant properties from Kitolod leaves.
Co-Authors Dinafa, Nazwa Jinanti Jinanti, Nazwa Muharti, Asti Nani Yulianti Nurhayati Bialangi Situmeang, Boima Susvira, Dian Widiyanto, Holisha