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@PHDTHESIS{Zhang:819606,
      author       = {Zhang, Jing},
      title        = {{S}orption of polycyclic aromatic hydrocarbon ({PAH}) to
                      {Y}angtze {R}iver sediments and their components},
      volume       = {59},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2016-05227},
      isbn         = {978-3-89336-616-3},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {X, 109},
      year         = {2010},
      note         = {RWTH Aachen, Diss., 2010},
      abstract     = {Sorption of hydrophobic organic chemical (HOC) to natural
                      sediments includescomplex mechanisms. The present work
                      studies the sorption of polycyclic aromatichydrocarbon (PAH)
                      to Yangtze River sediments. The major objectives were
                      toinvestigate the sorption mechanisms of PAH to sediments
                      and the effect of sedimentsheterogeneity. Specifically, the
                      sorption and distribution of PAH in the fractions
                      ofamorphous organic carbon (AOC), black carbon (BC) and
                      mineral surface wereinvestigated. Pyrene and phenanthrene
                      were involved as major target PAH chemicals for examining
                      the sorption equilibriums in single and binary solute
                      systems. The sorbents include model sediment constituents
                      and five sediments collected from the Yangtze River. The
                      preheated sediments according to the chemothermal oxidation
                      method (CTO-375, Gustafsson et al., 1997) were also studied.
                      In which, the remaining organic carbon (OC)is considered as
                      BC. Analytical procedures for the determination of PAH in
                      solution were developed with fluorescence spectroscopy.
                      Especially, the synchronous fluorescence spectroscopy (SFS)
                      was applied for simultaneous analyses of the primary solute
                      and cosolute PAH in binary solute systems. The sorption
                      isotherms were fitted with different types of model,
                      including Freundlich model, Polanyi-based adsorption model
                      and composite models which comprise a partition model and an
                      adsorption model. The major findings include the following
                      aspects. Firstly, the sorption of pyrene to pristine
                      sediments was found to be mainly dependent on the OC content
                      rather than on the specific surface area (SSA) or the
                      microporosity of sorbents. Composite models were applied for
                      distinguishing the partition and adsorption. The adsorption
                      dominates in the low concentration range, while the
                      partition becomesmore important at high concentrations. The
                      fitted partition coefficients are linearly dependent on the
                      AOC content (fAOC) of sediments, which supports a pyrene
                      partition in the AOC phase in sediments at a high
                      equilibrium concentration. Secondly, the fitted adsorption
                      of pyrene to pristine sediments was compared with that to
                      the preheated sediments. Our finding that the adsorption
                      capacity of the BC fraction is similar in pristine and
                      preheated sediments suggests that the low content AOC in the
                      pristine sediments does not affect the adsorption capacity
                      of the BC fraction. However, variations of fitting
                      parameters suppose that the adsorption dynamics may be
                      alteredthrough dispersive or flocculating effect. A
                      distribution model of pyrene between the AOC, BC and mineral
                      fractions of sediment was established according to the
                      fitted results with model and natural sorbents. It was found
                      that the adsorption to BC dominates the overall sorption at
                      low concentrations (relative concentration C$_{r}$ < 0.1).
                      The contribution of AOC becomes more important at high
                      concentrations. In the presence of OC in sediments, the
                      contribution of the mineral fraction to the overall sorption
                      is negligible.},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/819606},
}