title: [Mild solvent extraction technique for the evaluation of PAHs bioavailability].
abstract: n-butanol and hydroxypropyl-beta-cyclodextrin (HPCD) were used to extract polyclic aromatic hydrocarbons from 9 aged agricultural fields and to assess the PAHs bioavailability to earthworm (Eisenia fetida). It was demonstrated that the high molecular weight (HMW) PAHs (> or = 4 rings) contribute the largest proportions (4-ring PAHs: 34.06%, 5-6 rings: 34.09%) to the contaminants in long-term aged field soils. Moreover, the light molecular weight PAHs were easily accumulated in the earthworm,while the high molecular weight PAHs were hard to accumulate. The extraction by mild solvent correlated well with the 3 ring PAHs (r2 0.77-0.79) but not for the other rings PAHs (r2 <0.35), indicating that mild extraction may not serve as a good predictor of PAHs bioavailability to earthworm.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Zheng-Yong
authors.initials: ZY
authors.lastname: Lü
authors.forename: Xing-Lun
authors.initials: XL
authors.lastname: Yang
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Yin-Ping
authors.initials: YP
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
mesh_terms: D020001:1-Butanol / Q000737:chemistry; D000073738:2-Hydroxypropyl-beta-cyclodextrin; D000818:Animals; D001682:Biological Availability; D018556:Crops, Agricultural / Q000254:growth & development; D009835:Oligochaeta / Q000378:metabolism*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000493:pharmacokinetics*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*; D047392:beta-Cyclodextrins / Q000737:chemistry
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; D047392:beta-Cyclodextrins; D000073738:2-Hydroxypropyl-beta-cyclodextrin; D020001:1-Butanol