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Biodegradation of Chlorpyrifos by Microbes: A Review Rubiyatno; Maulana, Aulia; Tongco, Jovale Vincent; Yulisa, Arma; Park , Sang Hyeok; Jannat, Md Abu Hanifa; Permana, Rega; Thakali, Ocean; Lie, Michael; Fahssi, Aouatif; Aziez, Ouahiba; Bastidas, Camilo
Tropical Aquatic and Soil Pollution Volume 4 - Issue 1 - 2024
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/tasp.v4i1.403

Abstract

Chlorpyrifos (CP) is a widely used organophosphate pesticide known for its recalcitrant nature, raising concerns about potential ecological and health impacts due to its toxicity. Many plants and animals are contaminated with this pesticide. Microbial biodegradation offers an environmentally friendly and effective method to remove CP from the environment and mitigate its impacts, especially given its low cost, particularly when bioremediation is conducted on-site. Different types of microbial species have been found to function under various environmental conditions, with some, like Pseudomonas nitroreducens PS-2 and Pseudomonas aeruginosa (NCIM 2074), showing promising results with degradation rates of up to 100%. However, challenges exist, such as partial degradation caused by the presence of metabolites, and the recalcitrant nature of CP, which can impede microbes' ability to effectively degrade its hydrocarbon ring. Overall, a combination of approaches, such as microbial and algal methods, or the discovery of new microbial strains, can help overcome these challenges and further enhance the long-term viability of this technique.
Challenges and Future Prospects of Using Biochar for Soil Remediation Primus, Audrey; Marculescu, Alexandru; Cao, Linh Thi Thuy; Nadifah, Gina; Twum-Ampofo, Daniel; Jannat, Md Abu Hanifa; Tongco, Jovale Vincent
Tropical Aquatic and Soil Pollution Volume 5 - Issue 1 - 2025
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/tasp.v5i1.624

Abstract

Biochar gained significant attention as an eco-friendly and effective solution for remediating contaminated soils, particularly those impacted by pharmaceutical persistent pollutants (PPPs). These pollutants, known for their resistance to natural degradation and tendency to accumulate in soil, posed serious risks to both human health and ecosystems. To address this issue, researchers proposed the use of biochar as a remediation technology to remove PPPs through adsorption. As an efficient sorbent, biochar demonstrated the ability to immobilize pharmaceuticals in contaminated soils, thereby reducing their bioavailability and mobility, and ultimately mitigating their environmental impact. This review aimed to provide a comprehensive overview of the current understanding of PPPs contamination and the potential of biochar for remediation. It first summarized the occurrence of pharmaceutical pollutants in various countries and identified their primary sources. It then examined the environmental fate of these pollutants and outlined the key challenges associated with their management. The mechanisms by which biochar adsorbed pharmaceutical compounds were discussed in detail, followed by a case study that illustrated the effectiveness of this technology in practical applications. This review also evaluated the advantages and disadvantages of using biochar for remediation, along with the practical challenges encountered during its implementation. Future directions highlighted included developing methods for extracting toxic residues and enhancing the performance of biochar through chemical or structural modifications.
The Role of Microorganisms in the Degradation of Pesticides: A Sustainable Approach to Soil Remediation Varghese, Diya Merlin; Rubiyatno; Lie, Michael; Kristanti, Risky Ayu; Ruti, Annisa Andarini; Nadifah, Gina; Hossain, Ferdaus Mohd Altaf; Jannat, Md Abu Hanifa; Chairattanawat, Chayanee; Direstiyani, Lucky Caesar
Tropical Aquatic and Soil Pollution Volume 5 - Issue 1 - 2025
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/tasp.v5i1.625

Abstract

The widespread use of pesticides in agriculture, aquaculture, and public health has led to severe environmental and public health concerns due to their overapplication and persistence in ecosystems. Pesticide residues accumulate in soil, degrade its fertility, pollute groundwater, and harm non-target organisms, including beneficial insects and aquatic life. This persistent contamination poses a significant threat to biodiversity, food safety, and ecosystem resilience. The aim of this review is to examine microbial bioremediation as a sustainable and effective strategy for remediating pesticide-contaminated soils. The paper evaluates the mechanisms by which microorganisms degrade or transform hazardous pesticide compounds into less toxic or non-toxic forms and assesses the advantages and limitations of bioremediation technologies. Notably, bioremediation is recognized for its environmental compatibility, cost-effectiveness, and potential to restore soil health without undermining agricultural productivity. Recent studies highlight promising microbial strains capable of degrading diverse classes of pesticides under varying environmental conditions. However, challenges remain, including the scalability of microbial technologies, the complexity of mixed-contaminant sites, and the influence of abiotic factors on microbial efficacy. Future research should focus on optimizing microbial consortia, integrating genetic and metabolic engineering approaches, and developing field-scale applications tailored to specific agroecosystems. Advancing these areas will be critical for establishing bioremediation as a central pillar in sustainable pesticide management and environmental restoration strategies.
Current Challenges and Future Prospects of Green Construction in Malaysia Sam, Wil Son; Primus, Audrey; Sentiveanu , Daniela; Puspitasari, Surya Dewi; Jannat, Md Abu Hanifa; Jayapadma, Jayapadma Mudalige Miyuru Uthpala; Illahi, Yuangga Rizky; Permana, Muhamad Diki; Maharjan, Amit Kumar; Maharjan, Rabin; Tongco, Jovale Vincent
Civil and Sustainable Urban Engineering Volume 5 - Issue 1 - 2025
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v5i1.621

Abstract

Malaysia’s rapid urbanization, driven by a growing population and increasing industrial and infrastructural demands, significantly impacted the environment. The construction sector, a key contributor to economic growth, simultaneously became a major source of environmental degradation due to high resource consumption and waste generation. In response to these challenges, the integration of green materials and sustainable technologies emerged as a viable solution to minimize the negative environmental footprint of construction activities. This paper provides a comprehensive overview of the current state of green materials in Malaysia, including bamboo, organic waste, recycled concrete aggregate, and plastic waste, highlighting their benefits and limitations. Additionally, sustainable construction technologies such as solar energy, hydropower, biogas systems, green roofing, and rainwater harvesting are examined for their potential role in enhancing environmental sustainability. The study further evaluates existing government policies and regulations governing green construction in Malaysia, identifying key challenges such as ineffective waste management, regulatory enforcement gaps, and illegal dumping. Comparisons with international best practices, including those from Japan and Hong Kong, offer insights into potential improvements for Malaysia’s regulatory framework and implementation strategies. The paper also discusses the prospects of green materials and sustainable construction technologies, outlining potential solutions to enhance their adoption. By addressing both the challenges and opportunities within the sector, this review aims to contribute to the advancement of sustainable construction practices in Malaysia, ultimately fostering a eco-friendlier and more resilient built environment.
Effect of Substrate-to-Inoculum Ratio and Temperatures During the Start-up of Anaerobic Digestion of Fish Waste Yulisa, Arma; Chairattanawat, Chayanee; Park, Sang Hyeok; Jannat, Md Abu Hanifa; Hwang, Seokhwan
Industrial and Domestic Waste Management Volume 2 - Issue 1 - 2022
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (724.104 KB) | DOI: 10.53623/idwm.v2i1.80

Abstract

The high protein and lipid content of fish waste makes mono-digestion a difficult bioprocess for an anaerobic digestion (AD) system. On the other hand, the massive increase in fish and seafood consumption worldwide has led to an inevitable fish waste mono-AD. Therefore, this study was conducted to investigate the effects of food-to-microorganisms (F/M) ratios and temperatures during the start-up period of fish waste mono-digestion. F/M ratios of 0.5, 1, 2, and 3 on a g-COD/g-VSS basis were operated at 35°C and 45°C, representing mesophilic and hyper-mesophilic conditions, respectively. The increase in F/M ratio improved the maximum methane (CH4) production rate at both temperatures. However, F/M ratio of 0.5 generated the highest CH4 yield in mesophilic and hyper-mesophilic conditions (0.23±0.00 L-CH4/g-CODinput). Further increase in F/M ratio decreased CH4 yield up to 21.74% and 39.13% when the reactors were operated at 35°C and 45°C, respectively. When reactors were supplied with FM ratios of 0.5, 1, and 2, hyper-mesophilic temperature improved methanogenesis by up to 2.61% and shortened the lag phase by 22.88%. Meanwhile, F/M ratio 3 at 45°C decreased cumulative CH4 production by up to 26.57% and prolonged the lag phase by 10.19%. The result of this study is beneficial to managing the input substrate of a batch-AD system that treats fish waste as a sole substrate.