Fig. 4: City-space diagrams showing the influence of physicochemical properties on organophosphate ester (OPE) fate.
From: Emissions and fate of organophosphate esters in outdoor urban environments
Dominant chemical fate processes for A tris(2-chloroethyl)phosphate (TCEP) and B triphenyl phosphate (TPhP) using the average city parameterization, C TCEP with the vegetation reaction half-life (T1/2,V) slowed by a factor of 10 and D TCEP with the film reaction half-life (T1/2,F) quickened by a factor of 100. Points represent the 19 GAPS-Megacities locations; the color of each point represents the dominant fate process for that chemical in each city using its 2018 parameterization. Contour colors represent the dominant fate process in each region, with the intensity of the proportion of total emissions undergoing that process (as labeled in each region). Note that reaction in soil was the dominant process for TPhP in two cities but does not show on the contour plots using the “average” parameterization.
