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Environmental and Materials
Published by Institute for Advanced Science, Social, and Sustainable Future
ISSN : -     EISSN : 30250277     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Physics
The Environmental and Materials Journal (EAM) is a biannual journal published by the Institute for Advanced Social, Science, and Sustainable Future, Indonesia. This journal is dedicated to issue the most substantial and advanced of original and review articles related with the environmental issues and its related materials. Each submitted article will be carefully and thoroughly examined by a group of professional editors. The Earth’s changing climate and environmental issues need to be urgently addressed and it is a serious challenge for the scientific world. In this regards, the Environmental and Materials Journal seeks to publish high quality articles discussing the environmental problems and the related materials as well as the developed materials to solve the environmental problems. The subjects covered in this journal are: - Environmental issues and its management - Pollutant materials - Material sciences related to the environmental problems solving
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 2 No. 2: (December) 2024" : 5 Documents clear
A review of photoelectrochemical water oxidation using hematite photoanode Bodro, Odilia Galuh Ismoyo; Maulana, Ilham Aksan
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1368

Abstract

Background: The sun, as an abundant and renewable energy source, provides a sustainable alternative to fossil fuels, which contribute significantly to CO₂ emissions and global warming. With CO₂ emissions surpassing 35 billion tons in 2023, the need for clean energy solutions has become increasingly urgent. Solar energy utilization includes photoelectrochemical (PEC) water splitting, where hematite is widely recognized as an efficient photoanode material due to its availability, stability, and favorable band gap for visible light absorption. However, hematite faces challenges such as poor conductivity, surface recombination, and slow oxygen evolution reaction (OER) kinetics, which limit its performance. Methods: This review examines various strategies to enhance hematite photoanode performance for PEC water splitting. The study explores three key approaches: (1) using three-dimensional conductive substrates with high surface area to facilitate heterojunction formation, (2) doping with tetravalent metal ions (e.g., Ti⁴⁺) to improve conductivity and charge carrier density, and (3) integrating Bi₂WO₆ with hematite to enhance charge separation and photoelectrochemical efficiency. The hydrothermal method was applied for hematite fabrication due to its feasibility, cost-effectiveness, and scalability. Findings: The analysis highlights the effectiveness of each strategy in overcoming hematite’s inherent limitations. The use of 3D conductive substrates improves electron transport and surface reaction sites, while Ti⁴⁺ doping enhances charge carrier density and conductivity. Conclusion: Hematite remains a promising photoanode material for PEC water splitting, but its limitations must be addressed to maximize efficiency. The combination of 3D conductive substrates, metal ion doping, and Bi₂WO₆ integration has shown potential in improving hematite’s photoelectrochemical performance. Novelty/Originality of this article: This review provides a comprehensive analysis of hematite performance enhancement strategies, focusing on the synergistic effects of 3D conductive substrates, Ti⁴⁺ doping, and Bi₂WO₆ integration. 
The effect of acetylcholine immobilization on the electrochemical properties of thiocholine on boron-doped diamond electrode for chlorpyrifos sensor Atriardi, Shafrizal Rasyid; Hani, Adinda Muthia; Putri, Gadis
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1414

Abstract

Background: The inhibition reactions of acetylcholinesterase (AChE) have been studied to develop chlorpyrifos biosensors. The performance of AChE, both as a free enzyme and when immobilized on avidin-functionalized magnetic beads (aMB), was evaluated for the hydrolysis of acetylthiocholine. Detection was conducted through the oxidation of thiocholine on a boron-doped diamond (BDD) electrode surface. Methods: The study compared the performance of free and immobilized AChE by analyzing their ability to oxidize thiocholine on the BDD electrode surface. The inhibitory effects of chlorpyrifos were assessed by determining IC10 and IC50 values for both enzyme forms. Additionally, the influence of metal ions (Fe²⁺ and Mn²⁺) on AChE activity was investigated to evaluate interference effects. Findings: Free AChE demonstrated superior performance in thiocholine oxidation compared to the immobilized enzyme. In chlorpyrifos detection, free AChE exhibited a significantly lower IC10 value (3.44 × 10⁻⁶ mM) compared to immobilized AChE (12.9 × 10⁻⁶ mM), and its IC50 value (3.8 × 10⁻⁴ mM) was approximately two orders of magnitude lower than that of the immobilized AChE (5.18 mM). Furthermore, AChE exhibited resistance to metal ion interference, with signal losses of 48.7% and 40.8% in the presence of Fe²⁺ and Mn²⁺ ions, respectively. These findings indicate that the immobilization of AChE must be carefully optimized for effective sensor application. Conclusion: The study highlights the superior performance of free AChE in chlorpyrifos detection compared to its immobilized counterpart. Immobilization significantly affects enzyme sensitivity, resulting in higher inhibitory concentration values. Additionally, AChE demonstrated notable resistance to interference from metal ions. These results emphasize the need for careful consideration when immobilizing AChE for sensor applications. Novelty/Originality or this article: This study provides a detailed comparison between free and immobilized AChE in chlorpyrifos biosensing, highlighting the impact of immobilization on enzyme sensitivity and performance. The findings contribute to the development of more efficient biosensors by emphasizing the importance of optimizing enzyme immobilization strategies.
Amine-modified Ni-DOBDC MOF for CO2 capture: CO2 adsorption capacity and reusability Fahriansyah, Irsan; Khatrin, Irena; Abdullah, Iman; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1431

Abstract

Background: Anthropogenic carbon dioxide (CO₂) emissions have risen significantly due to the extensive use of fossil fuels, necessitating the development of effective CO₂ capture and conversion techniques. Adsorption using Metal-Organic Frameworks (MOFs) has shown great potential due to their high CO₂ adsorption capacity, particularly Ni-based MOFs. Enhancing their adsorption efficiency remains a key research focus to improve sustainability in CO₂ capture applications. Methods: Ni-based MOF (Ni-DOBDC) was synthesized using the solvothermal method, employing DMF as the solvent and 2,5-dihydroxyterephthalic acid (DOBDC) as the organic ligand. To enhance CO₂ adsorption capacity, Ni-DOBDC was further modified with ethylenediamine (EDA) via post-synthetic modification. Structural characterization was performed using XRD, confirming similarity to the Ni-DOBDC reference (CCDC 288477), and FTIR, which showed enhanced absorbance peaks. SEM-EDX analysis revealed a flower-like morphology with an average particle size of 0.75 μm. CO₂ adsorption tests were conducted on Ni-DOBDC and EDA/Ni-DOBDC (10%) using the titration method under controlled conditions. Findings: The CO₂ adsorption capacity of Ni-DOBDC and EDA/Ni-DOBDC was tested at 70°C with a CO₂ concentration of 50% in N₂. EDA modification significantly improved CO₂ adsorption capacity, with EDA/Ni-DOBDC achieving 9.95 mmol g⁻¹ compared to pristine Ni-DOBDC’s 6.44 mmol g⁻¹. However, Ni-DOBDC exhibited better regeneration ability in a three-cycle reusability test, likely due to EDA leaching during regeneration. Conclusion:  EDA-modified Ni-DOBDC demonstrates enhanced CO₂ adsorption capacity, making it a promising material for CO₂ capture applications. However, its reduced regeneration stability suggests the need for further optimization to improve long-term performance. Future studies should explore strategies to minimize EDA leaching while maintaining high adsorption efficiency. Novelty/Originality of this article: This study provides new insights into improving Ni-based MOF performance for CO₂ capture through post-synthetic modification with EDA. The findings highlight a trade-off between increased adsorption capacity and material stability, emphasizing the need for further refinement in MOF functionalization strategies.
Analysis of microbial diversity in pesticide-contaminated soil: A study of culturable microorganisms Lamuka, Andre Putra; Aliwu, Putri Liani
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1435

Abstract

Background: Pesticide contamination of soil often leads to significant alterations in the structure and diversity of microbial communities, potentially affecting overall ecosystem function. Understanding these changes is crucial for assessing the ecological impact of pesticide use in agricultural areas. This study analyzes microbial diversity in pesticide-contaminated soil using the Shannon-Wiener diversity index to evaluate the effects of pesticide exposure on microbial populations. Methods: A descriptive quantitative approach was used, incorporating the Total Plate Count (TPC) test and Shannon-Wiener Index analysis. The numerical data included the number of microbial individuals (bacteria and fungi) and the relative proportion of each group. Soil samples were purposively collected from three points in a pesticide-contaminated tomato farming area in Dunggala Village, Gorontalo Regency. Findings: The microbial community detected in the contaminated soil consisted of bacteria (2.5×10⁴ CFU/ml) and fungi (1.35×10³ CFU/ml). The Shannon-Wiener index value was 0.202, indicating low microbial diversity. This suggests that pesticide contamination negatively impacts microbial richness and evenness in the soil. Conclusion: Pesticide contamination significantly reduces microbial diversity, as reflected in the low Shannon-Wiener index value. This decline in microbial richness and evenness highlights the potential ecological consequences of pesticide use in agriculture. To mitigate these negative effects, implementing sustainable pest management practices, such as the use of biopesticides, is recommended. Novelty/Originality of this article: This study provides quantitative evidence of the decline in microbial diversity in pesticide-contaminated soil using the Shannon-Wiener index. By focusing on microbial community changes in a specific agricultural setting, the findings contribute to a better understanding of the ecological impacts of pesticide use and emphasize the need for sustainable pest management strategies.
Bioremediation based on palm oil sludge as an intervention for heavy metal pollution risk in industrial residential Azrial, Fahmi; Sahdan, Fahrizal; Putri, Okta Angelia; Listiana, Ika
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1641

Abstract

Background: The palm oil industry in Indonesia, often pollution the environment, especially water bodies, with waste containing hazardous metals. This can threaten the lives of aquatic organisms and damage ecosystems. Although the palm oil industry has become a pillar of the national economy with production reaching 46,986 tons in 2023, the waste problems generated, especially palm oil sludge, demand innovative and sustainable solutions. The limitations of existing technologies in handling heavy metal pollution drive the need for an interdisciplinary approach that not only reduces environmental risks but also provides economic added value through circular economy concepts and local resource empowerment. The aim of this study is to identify the characteristics of palm oil sludge-based bioremediation stones in the process of heavy metal adsorption. Methods: This study was conducted through descriptive analytical literature review with a qualitative approach. Findings: The results show that palm oil sludge-based bioremediation stones have microporosity characteristics and complex chemical compositions capable of absorbing heavy metals with efficiency reaching 85-92%. This innovation not only offers sustainable solutions, but also provides multidimensional benefits, including reduced public health risks and the creation of circular economic models. Conclusion: Through activation with sulfuric acid, the potential for heavy metal absorption can be increased by up to 35%, which implies a 70% reduction in environmental contamination in industrial areas. Novelty/Originality of this article: This innovation integrates an interdisciplinary approach combining environmental science, chemistry, and resource management, potentially creating a replicable risk intervention model for industrial areas, with economic value.

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