Unveiling the Aftermath: Exploring Residue Profiles of Insecticides, Herbicides, and Fungicides in Rice Straw, Soils, and Air Post-Mixed Pesticide-Contaminated Biomass Burning
Author:
Lamnoi Suteekan1, Boonupara Thirasant1ORCID, Sumitsawan Sulak1ORCID, Vongruang Patipat2ORCID, Prapamontol Tippawan3ORCID, Udomkun Patchimaporn14ORCID, Kajitvichyanukul Puangrat1ORCID
Affiliation:
1. Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand 2. Environmental Health, School of Public Health, University of Phayao, Phayao 56000, Thailand 3. Environmental and Health Research Group, Research Institute for Health Sciences, Chiang Mai University, Chiang Mai 50200, Thailand 4. Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
Abstract
This study delved into the impact of open biomass burning on the distribution of pesticide and polycyclic aromatic hydrocarbon (PAH) residues across soil, rice straw, total suspended particulates (TSP), particulate matter with aerodynamic diameter ≤ 10 µm (PM10), and aerosols. A combination of herbicides atrazine (ATZ) and diuron (DIU), fungicide carbendazim (CBD), and insecticide chlorpyriphos (CPF) was applied to biomass before burning. Post-burning, the primary soil pesticide shifted from propyzamide (67.6%) to chlorpyriphos (94.8%). Raw straw biomass retained residues from all pesticide groups, with chlorpyriphos notably dominating (79.7%). Ash residue analysis unveiled significant alterations, with elevated concentrations of chlorpyriphos and terbuthylazine, alongside the emergence of atrazine-desethyl and triadimenol. Pre-burning TSP analysis identified 15 pesticides, with linuron as the primary compound (51.8%). Post-burning, all 21 pesticides were detected, showing significant increases in metobromuron, atrazine-desethyl, and cyanazine concentrations. PM10 composition mirrored TSP but exhibited additional compounds and heightened concentrations, particularly for atrazine, linuron, and cyanazine. Aerosol analysis post-burning indicated a substantial 39.2-fold increase in atrazine concentration, accompanied by the presence of sebuthylazine, formothion, and propyzamide. Carcinogenic PAHs exhibited noteworthy post-burning increases, contributing around 90.1 and 86.9% of all detected PAHs in TSP and PM10, respectively. These insights advance understanding of pesticide dynamics in burning processes, crucial for implementing sustainable agricultural practices and safeguarding environmental and human health.
Funder
Chiang Mai University NSRF via the Program Management Unit for Human Resources & Institutional Development, Research, and Innovation
Subject
Chemical Health and Safety,Health, Toxicology and Mutagenesis,Toxicology
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