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All Journal Jurnal Biologi Tropis LAVOISIER: Chemistry Education Journal LAVOISIER: Chemistry Education Journal JES-TM Social and Community Service
Abdul Rohman Wali
Politeknik Negeri Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Education Engineering Immunology & microbiology Social Sciences Other

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Literature Review: The Effect of Activated Carbon Adsorption on the Reduction of Iron (Fe) Concentrations in Peat Water Yogi Chandra; Heni Sugesti; Arya Wiranata; Abdul Rohman Wali
LAVOISIER: Chemistry Education Journal Vol 5, No 1 (2026)
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v5i1.19921

Abstract

Peatlands in Riau Province have great potential as a water source, but their quality often fails to meet standards due to high organic matter content and levels of heavy metals such as iron (Fe), which can pose health risks. This study aims to evaluate the effectiveness of various types of activated carbon derived from agricultural waste and biomass in reducing iron (Fe) levels in peat water through a Systematic Literature Review (SLR) based on the PRISMA 2020. A total of 8 relevant articles from the Google Scholar and ScienceDirect databases were analyzed, covering the use of materials such as empty oil palm fruit bunches, bintaro fruit shells, bamboo stalks, tofu residue, shrimp shells, corn cobs, coffee grounds, and natural zeolite. The results of the study indicate that the activation process, whether physical or chemical (using activators such as H₃PO₄, HCl, or KOH), is crucial in enhancing the porosity and surface area of activated carbon to optimize adsorption capacity. The highest iron (Fe) reduction efficiency reached 99.66% and was achieved using corn cob activated carbon activated with 0.25 M HCl at 400°C. Overall, the use of biomass waste as an adsorbent is not only effective and economical in improving peat water quality but also supports sustainable waste management.
Kolaborasi PSDKU Siak: Peningkatan Fasilitas Bank Sampah Pelangi dengan Cat Ramah Lingkungan Arya Wieanata; Trisuciati Syahwardini; Hasrul Hasrul; Ni Putu Vidya Primarista; Abdul Rohman Wali
Journal of Social and Community Service Vol. 4 No. 3 (2025): November 2025
Publisher : Faculty of Engineering University of Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Achieving the Sustainable Development Goals (SDGs), particularly SDGs 11 and 12, is a top priority requiring the development of eco-friendly products and community empowerment through waste management. The Induk Pelangi Waste Bank in Siak Sri Indrapura is an active community-based waste management facility that requires support for infrastructure improvement. This program was conducted during October 2025, beginning with the identification of partner needs focused on the revitalization of the administration building. The solution was implemented through an appropriate technology approach, where the physical renovation process served as a vehicle for the application of eco-friendly natural rubber latex-based paint research. This innovative product is the result of research collaboration between Politeknik Negeri Sriwijaya PSDKU Siak and the University of Riau. The paint application was carried out in two coats in a participatory manner on the building's interior and exterior. The results show that the administration building now appears neater and more presentable. Furthermore, this activity successfully demonstrated the viability of green technology and served as an educational medium that aligns the waste bank's infrastructure with the environmental values it promotes.
Literature Review: The Effect of Activated Carbon Adsorption on the Reduction of Iron (Fe) Concentrations in Peat Water Yogi Chandra; Heni Sugesti; Arya Wiranata; Abdul Rohman Wali
LAVOISIER: Chemistry Education Journal Vol 5, No 1 (2026)
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v5i1.19921

Abstract

Peatlands in Riau Province have great potential as a water source, but their quality often fails to meet standards due to high organic matter content and levels of heavy metals such as iron (Fe), which can pose health risks. This study aims to evaluate the effectiveness of various types of activated carbon derived from agricultural waste and biomass in reducing iron (Fe) levels in peat water through a Systematic Literature Review (SLR) based on the PRISMA 2020. A total of 8 relevant articles from the Google Scholar and ScienceDirect databases were analyzed, covering the use of materials such as empty oil palm fruit bunches, bintaro fruit shells, bamboo stalks, tofu residue, shrimp shells, corn cobs, coffee grounds, and natural zeolite. The results of the study indicate that the activation process, whether physical or chemical (using activators such as H₃PO₄, HCl, or KOH), is crucial in enhancing the porosity and surface area of activated carbon to optimize adsorption capacity. The highest iron (Fe) reduction efficiency reached 99.66% and was achieved using corn cob activated carbon activated with 0.25 M HCl at 400°C. Overall, the use of biomass waste as an adsorbent is not only effective and economical in improving peat water quality but also supports sustainable waste management.
The Effect of Sugar Variation and Fermentation Time on Hydrogen Peroxide Levels and Eco-Enzyme Antibacterial Activity Ni Putu Vidya Primarista; Abdul Rohman Wali; Trisuciati Syahwardini
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11178

Abstract

Eco-enzyme is a filtrate resulting from the fermentation of sugar, organic materials, and water, which is produced not only to reduce organic waste but also as a functional product. This study aims to examine the effects of sugar type and the eco-enzyme's fermentation duration on three key parameters: bacterial optical density, hydrogen peroxide concentration, and inhibition zone against Staphylococcus aureus and Escherichia coli. The bacterial optical density was determined from absorbance measured at 600 nm using a UV-Vis spectrophotometer, the hydrogen peroxide concentration was determined by permanganometric titration, and the inhibition zone of the eco-enzyme against Staphylococcus aureus and Escherichia coli was determined using the disc diffusion method. The results showed that the eco-enzyme fermented with molasses for one month had the highest bacterial optical density. Meanwhile, the highest hydrogen peroxide concentration was found in the eco-enzyme fermented with molasses for three months. In addition, the eco-enzyme fermented with molasses for three months exhibited the highest antibacterial activity against Staphylococcus aureus and Escherichia coli, with inhibition zones of 6.59 mm and 6.37 mm, respectively. Eco-enzymes fermented with granulated sugar, palm sugar, and molasses all showed antibacterial activity against Staphylococcus aureus and Escherichia coli. However, the highest antibacterial activity against both bacteria was observed in the eco-enzyme fermented with molasses for three months.
Impact Sugar Type, Fermentation Duration, and Concentration of Eco-Enzyme on pH, TDS, and Antibacterial Activity Ni Putu Vidya Primarista; Damiana Nofita Birhi; Faustina De Yesu Prisila Abi; Fena Retyo Titani; Arya Wiranata; Abdul Rohman Wali
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.12651

Abstract

Eco-enzymes produced from fruit and vegetable waste are increasingly used for waste valorization and natural disinfection, but the combined effects of sugar type, fermentation duration and dilution on their quality remain unclear. This study examined eco-enzymes from mixed fruit peels prepared with granulated sugar, brown sugar and molasses, fermented for 1, 2 and 3 months, and diluted to 20%, 10%, 1%, 0.2% and 0.1%. Physicochemical properties (pH, TDS) and antibacterial activity against Staphylococcus aureus and Escherichia coli were measured; data were analysed by one-way ANOVA with Tukey’s test and Pearson correlation. Eco-enzymes were strongly acidic (≈3.5–3.9) at 20–10% and approached neutrality at 0.1%, with molasses-based formulations maintaining the lowest pH at high dilutions. TDS showed fermentation‑time‑dependent trends that differed between concentrated and dilute solutions. No inhibition was observed in month 1; activity appeared after ≥2 months and was highest at 3 months, with three‑month molasses eco-enzymes at 20% giving the largest inhibition zones and retaining activity at 0.1–0.2%. These findings identify molasses and extended fermentation as key levers to improve eco-enzyme performance as low-cost natural antibacterial agents.
Co-Authors Arya Wieanata Arya Wiranata Damiana Nofita Birhi Faustina De Yesu Prisila Abi Fena Retyo Titani Hasrul Hasrul Heni Sugesti Ni putu Vidya Primarista Trisuciati Syahwardini Yogi Chandra