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Residues of atrazine and diuron in rice straw, soils, and air post herbicide-contaminated straw biomass burning. | LitMetric

AI Article Synopsis

  • The study examines the effects of burning biomass contaminated with herbicides, specifically focusing on atrazine (ATZ) and diuron (DIU) on rice straw.
  • Soil and atmospheric samples showed significant changes in herbicide concentrations and the emergence of harmful substances like carcinogenic polycyclic aromatic hydrocarbons (PAHs) after burning.
  • The results highlight the environmental dangers of burning contaminated biomass and call for better agricultural practices and regulatory measures to reduce contamination and safeguard human health.

Article Abstract

This study investigates the environmental impact of burning herbicide-contaminated biomass, focusing on atrazine (ATZ) and diuron (DIU) sprayed on rice straw prior to burning. Samples of soil, biomass residues, total suspended particulate (TSP), particulate matter with an aerodynamic diameter ≤ 10 µm (PM), and aerosols were collected and analyzed. Soil analysis before and after burning contaminated biomass showed significant changes, with 2,4-dichlorophenoxyacetic acid (2,4-D) initially constituting 79.2% and decreasing by 3.3 times post-burning. Atrazine-desethyl, sebuthylazine, and terbuthylazine were detected post-burning. In raw rice straw biomass, terbuthylazine dominated at 80.0%, but burning ATZ-contaminated biomass led to the detection of atrazine-desethyl and notable increases in sebuthylazine and terbuthylazine. Conversely, burning DIU-contaminated biomass resulted in a shift to 2,4-D dominance. Analysis of atmospheric components showed changes in TSP, PM, and aerosol samples. Linuron in ambient TSP decreased by 1.6 times after burning ATZ-contaminated biomass, while atrazine increased by 2.9 times. Carcinogenic polycyclic aromatic hydrocarbons (PAHs), including benzo[a]anthracene (BaA), benzo[a]pyrene (BaP), and benzo[b]fluoranthene (BbF), increased by approximately 9.9 to 13.9 times after burning ATZ-contaminated biomass. In PM, BaA and BaP concentrations increased by approximately 11.4 and 19.0 times, respectively, after burning ATZ-contaminated biomass. This study sheds light on the environmental risks posed by burning herbicide-contaminated biomass, emphasizing the need for sustainable agricultural practices and effective waste management. The findings underscore the importance of regulatory measures to mitigate environmental contamination and protect human health.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11164915PMC
http://dx.doi.org/10.1038/s41598-024-64291-2DOI Listing

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