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000045862 084__ $$2WoS$$aChemistry, Physical
000045862 1001_ $$0P:(DE-Juel1)VDB54076$$aBaßmann-Schnitzler, F.$$b0$$uFZJ
000045862 245__ $$aSorption properties of hydrophobically modified poly(acrylic acids) as natural organic matter model substances to pyrene
000045862 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2005
000045862 300__ $$a119 - 128
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000045862 440_0 $$01360$$aColloids and Surfaces A:Physicochemical and Engineering Aspects$$v260$$x0927-7757
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000045862 520__ $$aAmphiphilic natural organic matter (NOM) in soil, water and sediments plays an important role in the fate of low-soluble hydrophobic organic compounds (HOC) in the environment. Scaling NOM structural factors, which affect the transport and immobilization of HOC, is rather involved due to the complexity of the NOM materials. Sorption properties of hydrophobically modified polyacrylic (HMPA) polymers as NOM model substances for pyrene were investigated and discussed with regard to reported NOM results. Emission fluorescence spectroscopic properties of pyrene and potentiometric titrations were used to characterize the hydrophobic and acidic properties of HMPA samples. Excitation fluorescence spectroscopy allowed a speciation of pyrene molecules. Overall complexation constants, beta(1) and beta(2) of pyrene with hydrophobic moieties (-C8H17) and (-C16H33) were calculated depending on the pH and electrolyte cation nature at an ionic strength of 10 mM, typical of soil solution conditions. Aggregation of HMPA molecules was detected by photon correlation spectroscopy. Normalized sorption constant K-oc values for pyrene with HMPA samples similar to reported values with NOM support recent observations on the contribution of aliphatic moieties to the binding of polyaromatic hydrocarbons (PAH). The HMPA samples also model the partitioning behavior of hydrophobic micelle-like structures of NOM. (c) 2005 Elsevier B.V. All rights reserved.
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000045862 65320 $$2Author$$ahydrophobically modified poly(acrylic acid)
000045862 65320 $$2Author$$ahumic acid
000045862 65320 $$2Author$$apyrene
000045862 65320 $$2Author$$afluorescence spectroscopy
000045862 65320 $$2Author$$apotentiometric measurements
000045862 7001_ $$0P:(DE-Juel1)VDB9230$$aSéquaris, J.-M.$$b1$$uFZJ
000045862 773__ $$0PERI:(DE-600)1500517-3$$a10.1016/j.colsurfa.2005.04.001$$gVol. 260, p. 119 - 128$$p119 - 128$$q260<119 - 128$$tColloids and surfaces / A$$v260$$x0927-7757$$y2005
000045862 8567_ $$uhttp://dx.doi.org/10.1016/j.colsurfa.2005.04.001
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