title: Predicting bioavailability of PAHs in field-contaminated soils by passive sampling with triolein embedded cellulose acetate membranes.
abstract: Triolein embedded cellulose acetate membrane (TECAM) was used for passive sampling of the fraction of naphthalene, phenanthrene, pyrene and benzo[a]pyrene in 18 field-contaminated soils. The sampling process of PAHs by TECAM fitted well with a first-order kinetics model and PAHs reached 95% of equilibrium in TECAM within 20 h. Concentrations of PAHs in TECAM (C(TECAM)) correlated well with the concentrations in soils (r(2)=0.693-0.962, p<0.001). Furthermore, concentrations of PAHs determined in the soil solution were very close to the values estimated by C(TECAM) and the partition coefficient between TECAM and water (K(TECAM-w)). After lipid normalization nearly 1:1 relationships were observed between PAH concentrations in TECAMs and earthworms exposed to the soils (r(2)=0.591-0.824, n=18, p<0.01). These results suggest that TECAM can be a useful tool to predict bioavailability of PAHs in field-contaminated soils.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
authors.forename: Yuqiang
authors.initials: Y
authors.lastname: Tao
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Zhang
authors.forename: Zijian
authors.initials: Z
authors.lastname: Wang
authors.forename: Peter
authors.initials: P
authors.lastname: Christie
mesh_terms: D000818:Animals; D001682:Biological Availability; D002482:Cellulose / Q000031:analogs & derivatives; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D005240:Feasibility Studies; D008567:Membranes, Artificial; D009835:Oligochaeta / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000493:pharmacokinetics*; D012989:Soil Pollutants / Q000032:analysis / Q000493:pharmacokinetics*; D014304:Triolein
chemical_list: D008567:Membranes, Artificial; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D014304:Triolein; C005062:acetylcellulose; D002482:Cellulose