title: Adsorption of polycyclic aromatic hydrocarbons (PAHs) on Rhizopus oryzae cell walls: application of cosolvent models for validating the cell wall-water partition coefficient.
abstract: The cell wall-cosolvent partition coefficients (Km) of polycyclic aromatic hydrocarbons (PAHs) were determined for Rhizopus oryzae cell walls by controlling the volume fraction of methanol (f) ranging from 0.1 to 0.5. Five cosolvent models were employed for extrapolating the cell wall-water partition coefficients (Kw) in pure water. The extrapolated Kw values of four PAHs on R. oryzae cell walls were ranged from 2.9 to 5.1. Comparison of various Kw values of pyrene generated from extrapolation and the QSPR model, together with predicted different (PD), mean percentage deviations (MPD), and root mean square errors (RSE), revealed that the performance of the LL and Bayesian models were the best among all five tested cosolvent models. This study suggests that R. oryzae cell walls play an important role in the partitioning of PAHs during bioremediation because of the high Kw of fungal cell walls.
authors.affiliation: College of Environmental and Natural Resource Sciences, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University, Hangzhou 310058, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Ma
authors.forename: Minmin
authors.initials: M
authors.lastname: Xu
authors.forename: Jiaojiao
authors.initials: J
authors.lastname: Wang
authors.forename: Huaihai
authors.initials: H
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: He
authors.forename: Laosheng
authors.initials: L
authors.lastname: Wu
authors.forename: Haizhen
authors.initials: H
authors.lastname: Wang
authors.forename: Jianming
authors.initials: J
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D002473:Cell Wall / Q000378:metabolism*; D008954:Models, Biological; D011084:Polycyclic Aromatic Hydrocarbons / Q000378:metabolism*; D011721:Pyrenes / Q000378:metabolism; D012233:Rhizopus / Q000166:cytology* / Q000378:metabolism*; D012997:Solvents / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D012997:Solvents; D014867:Water; C030984:pyrene