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@ARTICLE{Koak:317367,
      author       = {Košak, Aljoša and Bauman, Maja and Padeznik Gomilsek,
                      Jana and Lobnik, Aleksandra},
      title        = {{L}ead ({II}) complexation with 3-mercaptopropyl-groups in
                      the surface layer of silica nanoparticles: {S}orption,
                      kinetics and {EXAFS}/{XANES} study},
      journal      = {Journal of molecular liquids},
      volume       = {229},
      issn         = {0167-7322},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2017-00635},
      pages        = {371 - 379},
      year         = {2017},
      note         = {(c) Elsevier B.V. Post referee full text in progress
                      (embargo 1 year from 2 December 2016).},
      abstract     = {In this work, mono-dispersed mercapto-functionalized silica
                      (SiO$_2$@SH) particles with a narrowparticle size
                      distributionof around (420±10) nmwere prepared by the
                      sol–gel method for the adsorption of aqueous dissolvedlead
                      (Pb$^{2+}$) ions from modeled wastewater. Transmission
                      Electron Microscopy (TEM), in combination with
                      Energy-Dispersive X-ray Spectroscopy (EDXS), was used to
                      obtain information about the particle size and morphologyof
                      the prepared samples. Dispersive X-ray Spectroscopy (EDXS)
                      indicated strong signals of Si and S, implyingsuccessful
                      completion after the mercapto (-SH) functionalization of the
                      silica (SiO$_{2}$) surfaces. Fourier TransformInfrared
                      Spectroscopy (FTIR) was used to determine the occurrences of
                      Si–O–Si and -SH vibrations within thesamples and, thus,
                      come to a conclusion about the formations of the
                      mercapto-functionalized samples. Analysiswas performed of
                      Pb$^{2+}$ adsorption with mercapto-groups (-SH) on the
                      surface of the SiO$_{2}$@SH particles. The resultsfor
                      Pb$^{2+}$ adsorptions fromthemodeledwastewater showed
                      affinity of around 55\% and the obtained value ofthe maximum
                      amount of adsorbed Pb$^{2+}$ ions with the SiO$_{2}$@SH
                      samples was 10.82 mg/g under the conditionsused during this
                      study. The results of the adsorptions were fitted with the
                      Langmuir and Freundlich isothermmodels and the pseudo-first
                      and pseudo-second kinetic models were evaluated. We employed
                      Pb-L3 edge Xrayabsorption spectroscopy techniques XANES
                      (X-ray Absorption Near Edge Structure) and EXAFS
                      (ExtendedX-ray Absorption Fine Structure) for probing the
                      local environments of Pb within the tentative Pb-S
                      complexafter adsorptions of Pb$^{2+}$ by the mercapto
                      groups. The EXAFS/XANES analysis indicated complete
                      Pb$^{2+}$ complexationwith two -SH groups of the prepared
                      SiO$_{2}$@SH samples.},
      cin          = {DOOR},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {899 - ohne Topic (POF3-899) / FS-Proposal: I-20110082 EC
                      (I-20110082-EC)},
      pid          = {G:(DE-HGF)POF3-899 / G:(DE-H253)I-20110082-EC},
      experiment   = {EXP:(DE-H253)D-C-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000395598800046},
      doi          = {10.1016/j.molliq.2016.11.115},
      url          = {https://bib-pubdb1.desy.de/record/317367},
}