Retardation of organo-bromides in a fractured chalk aquitard.
This study investigates the mechanisms controlling the distribution of 3-bromo-2,2-bis(bromomethyl)propanol (TBNPA) and 2,2-bis(bromomethyl)propan-1,3-diol (DBNPG) in a fractured chalk aquitard. An extensive monitoring program showed a systematic decrease in the TBNPA/DBNPG ratio with distance from the contamination source. Sorption of TBNPA on the white and/or gray chalks comprising the aquitard is approximately one order of magnitude greater than that of DBNPG. This results in more efficient removal of TBNPA from the fracture into the porous matrix and thus decreases the TBNPA/DBNPG ratio in the fracture water. Mathematical modeling of solute transport in the fracture domain illustrates the probable importance of sorption in controlling the spatial variation in TBNPA and DBNPG ratio.
Ezra
Shai
S
Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel. shaie@bgumail.bgu.ac.il
Feinstein
Shimon
S
Yakirevich
Alex
A
Adar
Eilon
E
Bilkis
Itzhak
I
D000327:Adsorption; D002119:Calcium Carbonate / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D020005:Propanols / Q000737:chemistry*; D011409:Propylene Glycols / Q000737:chemistry*; D012989:Soil Pollutants
C500381:3-bromo-2,2-bis(bromomethyl)propanol; D020005:Propanols; D011409:Propylene Glycols; D012989:Soil Pollutants; C060080:2,2-bis(bromomethyl)-1,3-propanediol; D002119:Calcium Carbonate