@article{fdi:010092785,
  title = {{D}issipation of the insecticide profenofos in tropical agricultural soils ({B}erambadi catchment, {S}outh {I}ndia) : {I}nsight from compound-specific isotope analysis ({CSIA})},
  author = {{M}asbou, {J}. and {G}rail, {C}. and {P}ayraudeau, {S}. and {R}uiz, {L}. and {S}ekhar, {M}. and {R}iotte, {J}ean and {I}mfeld, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}ssessing the role of agricultural lands in pesticide contamination of water ecosystems is critical for water management agencies and policymakers when formulating effective mitigation strategies. {C}urrent approaches based on concentration measurements are often insufficient to evaluate the contribution of pesticide dissipation processes in complex agroecosystems. {T}his study focuses on the dissipation of profenofos insecticide within plots subject to intensive agriculture in the {B}erambadi watershed ({I}ndia). {W}e examined profenofos dissipation kinetics and related carbon isotopic fractionation in laboratory volatilisation, hydrolysis, photolysis and soil biodegradation experiments, and in a field plot experiment. {P}rocess-specific isotope fractionation analyses revealed significant carbon isotope fractionation, with epsilon({C}) =- 2.0 f 0.8 %o during {UV} photolysis, and epsilon({C}) =- 0.9 f 0.4 %o during biodegradation of profenofos in the soil. {A}ccordingly, the formation of 4-bromo-2-chlorophenol and another profenofos transformation product indicated the cleavage of {O}-{P} and {C}-{B}r bonds in soil experiments. {B}y integrating dissipation kinetics, compound-specific isotope analysis ({CSIA}), transformation products analysis and modelling results, biodegradation was identified as the dominant dissipation process in the agricultural plot, accounting for > 90 % of profenofos dissipation. {M}odel predictions were consistent with the observed dissipation kinetics and isotopic data, confirming the fast degradation ({T}-1/2 = 1.1 +/- 0.6 day) and low (< 0.02 %) leaching potential of profenofos, which was not detected in the local groundwater monitored by passive samplers ({POCIS}). {O}verall, these results highlight the usefulness of profenofos {CSIA} to identify and unravel dissipation processes in tropical agroecosystems for improving contamination risk assessment.},
  keywords = {{P}esticide ; {S}oil ; {O}rganophosphates ; {B}iodegradation ; {P}hotolysis ; {S}table isotopes ; {M}odelling ; {INDE}},
  booktitle = {},
  journal = {{J}ournal of {H}azardous {M}aterials},
  volume = {488},
  numero = {},
  pages = {137428 [11 p.]},
  ISSN = {0304-3894},
  year = {2025},
  DOI = {10.1016/j.jhazmat.2025.137428},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092785},
}