title: Predicting the biodegradation of target hydrocarbons in the presence of mixed contaminants in soil.
abstract: The aim of this study was to investigate the prediction of (14)C-phenanthrene and (14)C-hexadecane biodegradation in the presence of other hydrocarbons in soil using beta- and alpha-cyclodextrin (CD) solutions, respectively. Prediction of the biodegradation of (14)C-phenanthrene using the beta-CD extraction was robust under single, co-contaminant and multiple contaminant conditions (r(2)=0.92, slope of best fit line=0.87, intercept=7.24, n=84). Prediction of (14)C-hexadecane using the alpha-CD extraction was robust under single and co-contaminant conditions (r(2)=0.92, slope of best fit line=0.97, intercept=1.24, n=60); however, the alpha-CD could not accurately predict (14)C-hexadecane biodegradation in the presence of multiple contaminants. The presence of multiple contaminants enhanced (14)C-hexadecane mineralisation, but did not enhance extractability. The results from this study provide further evidence for the application of HPCD extractions for the measurement of microbial accessibility in soil.
authors.affiliation: Department of Environmental Science, The Lancaster Environment Centre, Lancaster University, Lancaster, UK.
authors.forename: Jacqueline L
authors.initials: JL
authors.lastname: Stroud
authors.forename: Graeme I
authors.initials: GI
authors.lastname: Paton
authors.forename: Kirk T
authors.initials: KT
authors.lastname: Semple
mesh_terms: D001673:Biodegradation, Environmental; D003505:Cyclodextrins / Q000737:chemistry; D006838:Hydrocarbons / Q000737:chemistry / Q000378:metabolism*; D011237:Predictive Value of Tests; D012987:Soil; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*; D013997:Time Factors
chemical_list: D003505:Cyclodextrins; D006838:Hydrocarbons; D012987:Soil; D012989:Soil Pollutants