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Construction of a fusant bacterial strain simultaneously degrading atrazine and acetochlor and its application in soil bioremediation.
Sci Total Environ
January 2025
Jilin Academy of Agricultural Sciences (Northeast Agricultural Research Center of Chin), Gongzhuling 136100, Jilin, China. Electronic address:
Application of herbicide-degrading bacteria is an effective strategy to remove herbicide in soil. However, the ability of bacteria to degrade a herbicide is often severely limited in the presence of other pesticide. In this study, the atrazine-degrading strain Klebsiella varicola FH-1 and acetochlor-degrading strain Bacillus Aryabhatti LY-4 were used as parent strains to construct the recombinant RH-92 strain through protoplast fusion technology.
View Article and Find Full Text PDFAcetochlor degradation in anaerobic microcosms with hyporheic sediments: Insights from biogeochemical data, transformation products, and isotope analysis.
Water Res
December 2024
Hubei Key Laboratory of Yangtze River Basin Environmental Aquatic Science, School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074, Wuhan, PR China. Electronic address:
Steep redox gradients and diverse microbial communities in the anaerobic hyporheic zone create complex pathways for the degradation of herbicides, often linked to various terminal electron-accepting processes (TEAPs). Identifying the degradation pathways and their controlling factors under various TEAPs is of great significance for understanding mechanisms of water purification in the hyporheic zone. However, current research on herbicides in this area remains insufficient.
View Article and Find Full Text PDFBioaugmentation to enhance degradation of acetochlor and pretilachlor in water and sediment under anaerobic conditions.
FEMS Microbiol Lett
January 2025
The department of Agriculture, Natural Resources and Environment, Dong Thap University, 783 Pham Huu Lau Street, Cao Lanh City, Dong Thap Province 870000, Viet Nam.
Chloroacetamide herbicides are widely used to control weeds globally. In this study, three acetochlor-degrading mixed cultures using nitrate, sulfate, and ferric iron as electron acceptors were isolated and determined for their degradation under anaerobic conditions. The degradation rates of all mixed pure cultures in a mineral medium were not much different at 1 µM, while the rates at 50 µM were in the order: mixed culture using nitrate > sulfate > ferric iron as electron acceptors, giving 6.
View Article and Find Full Text PDFQuantitative measures of recent and lifetime agricultural pesticide use are associated with increased pesticide concentrations in house dust.
Environ Int
November 2024
Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD, USA.
Objective: Elevated pesticide concentrations have been found in dust from homes with residents who use agricultural pesticides, but few studies have compared these concentrations to quantitative measures of their use. We evaluated household pesticide dust concentrations in relation to quantitative, active ingredient-specific metrics of agricultural pesticide use in the Biomarkers of Exposure and Effect in Agriculture Study.
Methods: Participants provided vacuum dust samples (2013-2018) and information regarding recent (last 12 months) and lifetime pesticide use.
Enhanced remediation of acetochlor-contaminated soils using phosphate-modified biochar: Impacts on environmental fate, microbial communities, and plant health.
Sci Total Environ
December 2024
Nanjing Institute of Environmental Sciences, MEE, Nanjing 211299, China. Electronic address:
Article Synopsis
- Acetochlor (ACT) is a persistent contaminant in soil that harms microbial communities and sensitive crops, prompting this study to explore phosphate-modified biochar (PBC-800) as a remediation solution.
- The addition of 0.5% PBC-800 significantly improved the soil's ability to adsorb ACT and accelerated its degradation, reducing residual levels by up to 76.4% within 60 days.
- PBC-800 not only enhanced microbial diversity and stability but also improved the health of maize and soybean plants by decreasing ACT residues and restoring plant growth indicators like biomass and leaf chlorophyll content.
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