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All Journal Biology, Medicine, & Natural Product Chemistry Jurnal Inovasi Teknik Kimia Jurnal Redoks : Jurnal Pendidikan Kimia dan Ilmu Kimia
Dian Susvira
Sekolah Tinggi Analis Kimia Cilegon
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health

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The Effect of Methanol Concentrations Against Phenolic Total Content and Antioxidant of Balakacida Leaves (Chromolaena odorata) Sriwijayanti Sriwijayanti; Ahmad Firdaus; Boima Situmeang; Holisha Widiyanto; Dian Susvira
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.239-244

Abstract

The balakacida plant with the Latin name Chromolaena odorata is a plant that lives in a tropical climate. The balakacida plant is a plant of the Asteraceae Family. Phytochemical tests on balakacida leaves showed the presence of secondary metabolites of the tannin, phenol, flavonoid, saponin and steroid groups. This study aims to extract balakacida leaves and test the total phenolic and antioxidant content. Sample extraction was carried out by the maceration method using methanol solvent. Testing of total phenolic content using the Folin Ciocalteu method, while testing of antioxidant content using the DPPH method using a UV-Vis spectrophotometer. The results showed that the concentration of methanol solvent significantly affected the acquisition of total phenolics and antioxidants. The highest total phenolic content was obtained at a methanol extract concentration of 80% of 145.64 mg GAE/g. For antioxidant content, a methanol extract concentration of 60% showed the highest activity with an average DPPH % inhibition of 59.77%. It can be concluded that a methanol extract concentration of 60% is the optimal concentration to produce balakacida leaf extract with the best antioxidant activity, although not with the highest total phenolic content.
PERBANDINGAN AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL KULIT BATANG GANDARIA DENGAN METODE DPPH DAN ABTS Boima Situmeang; Nurhayati Bialangi; Weny JA Musa; Ahmad Kadir Kilo; Holisha Widiyanto; Dian Susvira; Nani Yulianti
JURNAL REDOKS : JURNAL PENDIDIKAN KIMIA DAN ILMU KIMIA Vol 8 No 2 (2025): Jurnal Redoks : Jurnal Pendidikan Kimia dan Ilmu Kimia
Publisher : Program Studi Pendidikan Kimia STKIP Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33627/re.v8i2.3323

Abstract

Penelitian ini bertujuan untuk membandingkan aktivitas antioksidan ekstrak metanol kulit batang gandaria (Bouea macrophylla Griff.) menggunakan dua metode pengujian, yaitu DPPH (2,2-diphenyl-1-picrylhydrazyl) dan ABTS (2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid)). Ekstraksi dilakukan secara maserasi menggunakan pelarut metanol. Aktivitas antioksidan ditentukan berdasarkan nilai IC50, yaitu konsentrasi yang diperlukan untuk meredam 50% radikal bebas. Hasil uji menunjukkan bahwa ekstrak memiliki aktivitas antioksidan sangat kuat dengan nilai IC50 sebesar 12,259 ± 0,232 ppm untuk metode DPPH dan 15,831 ± 1,550 ppm untuk metode ABTS. Nilai IC50 yang lebih rendah pada metode DPPH menunjukkan bahwa ekstrak memiliki kemampuan yang lebih tinggi dalam menangkap radikal bebas pada metode tersebut. Hasil ini menunjukkan bahwa kulit batang gandaria berpotensi sebagai sumber antioksidan alami yang efektif dengan kemampuan merangkal radikal bebas DPPH dan ABTS sangat kuat.
Lemon Extract as a Green Activator for Durian Peel-Derived Activated Carbon: Enhanced Copper Adsorption and Sustainable Waste Valorisation Ninik Triayu Susparini; Husnul Khotimah; Holishah Widiyanto; Dian Susvira; Lusi Aferta
Jurnal Inovasi Teknik Kimia Vol. 11 No. 3 (2026): JULY | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i3.15731

Abstract

The development of green, low-cost adsorbents from agricultural waste remains a critical challenge for sustainable wastewater treatment. Herein, durian peel waste was converted into porous activated carbon using lemon extract as a novel natural activator, and its efficiency for Cu²⁺ removal was systematically evaluated. The activation process drastically reduced moisture content from 14% to 2% and ash content from 14% to 4%, while increasing iodine adsorption capacity from 824.85 to 888.30 mg g⁻¹, fully complying with SNI 06-3730-1995 standards. SEM analysis revealed a remarkable transformation in surface morphology, with pore diameters expanding from 9.42–12.6 μm (non-activated) to 12.1–15.8 μm after activation, indicating successful pore development. EDX confirmed Cu deposition (0.67 atom%) on the adsorbent surface post-adsorption, corroborating effective metal uptake. Remarkably, the activated carbon achieved 99.61% Cu²⁺ removal efficiency under optimal conditions (25% lemon extract, 15 min contact time), representing one of the highest performances reported for fruit peel-based adsorbents. Two-way ANOVA demonstrated that both activator concentration and contact time significantly influenced adsorption efficiency (p < 0.05). These findings provide compelling evidence that lemon extract serves as an efficient, eco-friendly chemical activator, and that durian peel-derived activated carbon holds exceptional promise for practical remediation of copper-contaminated water.
Co-Authors Ahmad Firdaus Ahmad Kadir Kilo Boima Ramses Situmeang Boima Situmeang Holisha Widiyanto Holishah Widiyanto Husnul Khotimah Lusi Aferta Nani Yulianti Ninik Triayu Susparini Nurhayati Bialangi Sriwijayanti Sriwijayanti