Sorption of phenyl urea herbicides to black carbon

Environmental Science & Technology
Anna SobekT D Bucheli

Abstract

In this work, we developed a dialysis technique to determine black carbon (BC; diesel soot)-water distribution coefficients (K(BC)) of nine phenyl urea herbicides (PUHs). The K(BC) at 1 microg/L ranged over 2 orders of magnitude, with diuron displaying the highest log K(BC) of 4.5. The K(BC) were 20-170 times higher than corresponding estimated partitioning coefficients to organic carbon (K(OC)). This is consistent with earlier findings for more hydrophobic compounds. There was a linear increase in log K(BC) with decreasing thermodynamic difference between the geometrically optimized and planar molecule conformation (DeltaE(planar)). Hence, previous observations of enhanced BC adsorption of planar compounds (e.g., non-ortho-polychlorinated biphenyls) were confirmed also for the polar PUHs. Further, the data suggested indirectly that for molecules with several different functional groups (such as the PUHs), specific electron donor and acceptor interactions may be of more relevance for the adsorption to BC than the ability of the molecule to undergo dispersive van der Waals interactions. Sorption coefficients estimated from poly parameter linear solvation energy relationships (pp-LSER) based on data for activated carbon were 1-1....Continue Reading

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Citations

Dec 5, 2012·Environmental Science & Technology·Perry J Mitchell, Myrna J Simpson
Dec 19, 2012·Environmental Science & Technology·Fabienne SchwabBernd Nowack
Jul 30, 2014·Journal of Hazardous Materials·Rajesh ChintalaZheng Rong Gu
Nov 21, 2015·Environmental Science & Technology·Zhijiang LuPhilip M Gschwend
Jun 5, 2012·Environmental Pollution·G N KasoziA R Zimmerman
Jul 29, 2017·Environmental Science & Technology·J J PignatelloWenqing Xu
Sep 12, 2020·Journal of Pesticide Science·Yutaka Motoki
Jul 1, 2011·Reviews on Environmental Health·Rajendra Prasad, Mahmood A Khwaja
Jun 16, 2010·Journal of Agricultural and Food Chemistry·Xiao-Bing YangHong-Ping He
Jul 31, 2010·Environmental Science & Technology·Gabriel N KasoziBin Gao
Nov 6, 2010·Journal of Agricultural and Food Chemistry·Minori UchimiyaK Thomas Klasson
Sep 10, 2020·ACS Omega·Daniel Arulraj Abraham, Vairathevar Sivasamy Vasantha

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