U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

MECHANOCHEMICAL ENHANCEMENT OF THE NATURAL ATTENUATION CAPACITY OF SOILS USING TWO ORGANOPHOSPHATE BIOCIDES AS MODELS
Hu, A., G. Cagnetta, J. Huang, and G. Yu.
Journal of Hazardous Materials 360:71-81(2018)

The mechanochemical activation of four major soil components via ball milling induces generation of electrons on particle surfaces. The phenomenon was demonstrated to occur on oxides by formation of trapped electrons in oxygen vacancies as well as on quartz and clayey materials to form fresh electron-rich surfaces by homolytic bond rapture. Results from ball milling two toxic organophosphate biocides, chlorpyrifos and glyphosate, as model pollutants showed that the aromatic structure of chlorpyrifos determined a faster degradation rate compared to the aliphatic one of glyphosate because of the higher stability of generated radical intermediates. The aromatic moiety facilitated adsorption on clays, thus temporarily sequestering the molecule and delaying its degradation. Both organophosphates mineralized to an inorganic form. http://www.academia.edu/38124596/Hu_2018_J_Hazard_Mat_-_Soil_MC_activation.pdf



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.