Issue |
E3S Web of Conf.
Volume 559, 2024
2024 International Conference on Sustainable Technologies in Civil and Environmental Engineering (ICSTCE 2024)
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Article Number | 04026 | |
Number of page(s) | 11 | |
Section | Structural Engineering & Concrete Technology | |
DOI | https://doi.org/10.1051/e3sconf/202455904026 | |
Published online | 08 August 2024 |
Enhancing Soil Bioremediation: Microbial Composting Strategies for the Degradation of Chlorpyrifos Ethyl in Agricultural Soils
1 Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam.
2 Ministry of Natural Resources and Environment, 10 Ton That Thuyet, Nam Tu Liem district, Hanoi, Vietnam
3 Institute for Environment and Resources, Vietnam National University Ho Chi Minh City (VNU- HCMC), Ho Chi Minh City, 70000, Vietnam.
4 Research and Development Institutes Advanced Agrobilogy, Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Vietnam.
* Email: tthanh@ntt.edu.vntthanh@ntt.edu.vn
The study investigates the decomposition of Chlorpyrifos Ethyl (CE) in tea-growing soils using Biomix under varied conditions, aiming to enhance the safety of agricultural products. Biomix 1 demonstrated a significant capability for degrading CE, particularly at higher temperatures and an optimal pH of 6. It showcased higher microbial density for lignindecomposing organisms at 4.68×105 CFU/g for cellulose decomposition, 3.6×105 CFU/g for hemicellulose, and 2.5×105 CFU/g for lignin, indicating robust biodegradation potential. An intriguing outcome was Biomix 2’s improved performance with nitrogen supplementation, reaching over 96% degradation efficiency for CE at a concentration of 150ppm. Temperature fluctuations within the composting bins pointed to the thermophilic nature of the degrading microbes, with an initial increase to 35°C and subsequent stabilization, suggesting a vigorous decomposition phase followed by a plateau due to substrate depletion. These findings indicate that microbial composting at optimized moisture (60%) and pH levels can significantly degrade CE, with a higher degradation rate observed at 37°C compared to 25°C. Biomix amendments and maintained conditions reflect the practical application potential, aligning with the common agricultural CE concentrations of 120-150ppm. This study underlines the viability of using microbial composting as a sustainable and effective strategy for the bioremediation of pesticide-contaminated agricultural soils, with promising implications for environmental safety and public health.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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