title: Identification of TCE and PCE sorption and biodegradation parameters in a sandy aquifer for fate and transport modelling: batch and column studies.
abstract: The main aim of this study was to determine the sorption and biodegradation parameters of trichloroethene (TCE) and tetrachloroethene (PCE) as input data required for their fate and transport modelling in a Quaternary sandy aquifer. Sorption was determined based on batch and column experiments, while biodegradation was investigated using the compound-specific isotope analysis (CSIA). The aquifer materials medium (soil 1) to fine (soil 2) sands and groundwater samples came from the representative profile of the contaminated site (south-east Poland). The sorption isotherms were approximately linear (TCE, soil 1, K d = 0.0016; PCE, soil 1, K d = 0.0051; PCE, soil 2, K d = 0.0069) except for one case in which the best fitting was for the Langmuir isotherm (TCE, soil 2, K f = 0.6493 and S max = 0.0145). The results indicate low retardation coefficients (R) of TCE and PCE; however, somewhat lower values were obtained in batch compared to column experiments. In the column experiments with the presence of both contaminants, TCE influenced sorption of PCE, so that the R values for both compounds were almost two times higher. Non-significant differences in isotope compositions of TCE and PCE measured in the observation points (δ(13)C values within the range of -23.6 ÷ -24.3‰ and -26.3 ÷-27.7‰, respectively) indicate that biodegradation apparently is not an important process contributing to the natural attenuation of these contaminants in the studied sandy aquifer.
authors: Department of Hydrogeology and Engineering Geology, AGH University of Science and Technology, Krakow, Poland, ekret@agh.edu.pl.
authors: E
authors: E
authors: Kret
authors: A
authors: A
authors: Kiecak
authors: G
authors: G
authors: Malina
authors: I
authors: I
authors: Nijenhuis
authors: A
authors: A
authors: Postawa
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D002849:Chromatography, Gas; D004784:Environmental Monitoring; D060587:Groundwater / Q000737:chemistry; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D013750:Tetrachloroethylene / Q000032:analysis*; D014241:Trichloroethylene / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D014241:Trichloroethylene; D013750:Tetrachloroethylene
references: Chemosphere. 2007 Feb;67(2):300-11
references: 17123579
references: Appl Microbiol Biotechnol. 2010 Apr;86(3):839-52
references: 20174793
references: Chemosphere. 2012 Nov;89(11):1302-6
references: 22717163
references: J Contam Hydrol. 2013 Oct;153:92-105
references: 24077332
references: J Environ Manage. 2005 Apr;75(1):77-88
references: 15748805
references: Environ Sci Technol. 2005 Jun 1;39(11):4189-97
references: 15984799
references: J Contam Hydrol. 2005 Aug;78(4):327-42
references: 16040155
references: Chemosphere. 2011 Feb;82(6):809-16
references: 21130486
references: FEMS Microbiol Ecol. 2007 Oct;62(1):98-107
references: 17908097
references: Water Res. 2008 Feb;42(4-5):871-82
references: 17915287
references: J Contam Hydrol. 2009 Jun 26;107(1-2):22-44
references: 19395120
references: J Contam Hydrol. 2003 Oct;66(1-2):117-46
references: 14516944