Hauptseite > Publikationsdatenbank > Modeling the effects of Ca2+ and clay-associated organic carbon on the stability of colloids from topsoils > print

001     11860
005     20180208210848.0
024 7 _ |2 pmid
|a pmid:20079501
024 7 _ |2 DOI
|a 10.1016/j.jcis.2009.12.014
024 7 _ |2 WOS
|a WOS:000274602200002
037 _ _ |a PreJuSER-11860
041 _ _ |a eng
082 _ _ |a 540
084 _ _ |2 WoS
|a Chemistry, Physical
100 1 _ |a Séquaris, J.-M.
|b 0
|u FZJ
|0 P:(DE-Juel1)VDB9230
245 _ _ |a Modeling the effects of Ca2+ and clay-associated organic carbon on the stability of colloids from topsoils
260 _ _ |a Amsterdam [u.a.]
|b Elsevier
|c 2010
300 _ _ |a 408 - 414
336 7 _ |a Journal Article
|0 PUB:(DE-HGF)16
|2 PUB:(DE-HGF)
336 7 _ |a Output Types/Journal article
|2 DataCite
336 7 _ |a Journal Article
|0 0
|2 EndNote
336 7 _ |a ARTICLE
|2 BibTeX
336 7 _ |a JOURNAL_ARTICLE
|2 ORCID
336 7 _ |a article
|2 DRIVER
440 _ 0 |a Journal of Colloid and Interface Science
|x 0021-9797
|0 3193
|y 2
|v 342
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a The goals of the study were to investigate the effects of the soil-water phase ionic strength, mainly monitored by the calcium ion (Ca(2+)) concentration, on the stability behavior of easily dispersed topsoil colloidal clay-sized particles (<2 microm). The aggregation kinetics as a function of the Ca(2+) concentration was monitored by measuring the increase of the particle size over time with photon correlation spectroscopy. The critical coagulation concentrations (CCC) of Ca(2+) were measured. The Hamaker constants (A) characterizing the attractive chemical properties of the topsoil colloid surface were thus scaled according to the Derjaguin, Landau, Verwey, Overbeek (DLVO) theory by taking into account the electrokinetic behavior of the particles, measured by the zeta-potential. Effective values for the Hamaker constants of topsoil clay-sized colloids, clay minerals, and metal oxides were calculated by referring to reported values for crystalline silica or sand (quartz) particles. Potential-energy diagrams of interacting topsoil clay-sized colloids were calculated. The primary energy maximum and secondary energy minimum were used for modeling the aggregation kinetics along the Ca(2+) concentration by employing Marmur's model. Coagulation in the secondary energy minimum can only explain the aggregation efficiency of topsoil colloids at low Ca(2+) concentrations (<2 mM Ca(2+)) under unfavorable electrostatic conditions. The effect of surface-associated organic matter on the colloidal electrosteric stability was also investigated by comparing the topsoil colloid stability after the removal of organic matter.
536 _ _ |a Terrestrische Umwelt
|c P24
|2 G:(DE-HGF)
|0 G:(DE-Juel1)FUEK407
|x 0
588 _ _ |a Dataset connected to Web of Science, Pubmed
650 _ 7 |a J
|2 WoSType
653 2 0 |2 Author
|a Topsoil colloid
653 2 0 |2 Author
|a Aggregation kinetics
653 2 0 |2 Author
|a Ca2+
653 2 0 |2 Author
|a Energy minimum
653 2 0 |2 Author
|a Hamaker constant
653 2 0 |2 Author
|a Electrosteric stabilization
773 _ _ |a 10.1016/j.jcis.2009.12.014
|g Vol. 343, p. 408 - 414
|p 408 - 414
|q 343<408 - 414
|0 PERI:(DE-600)1469021-4
|t Journal of colloid and interface science
|v 343
|y 2010
|x 0021-9797
856 7 _ |u http://dx.doi.org/10.1016/j.jcis.2009.12.014
909 C O |o oai:juser.fz-juelich.de:11860
|p VDB
913 1 _ |k P24
|v Terrestrische Umwelt
|l Terrestrische Umwelt
|b Erde und Umwelt
|0 G:(DE-Juel1)FUEK407
|x 0
914 1 _ |y 2010
915 _ _ |0 StatID:(DE-HGF)0010
|a JCR/ISI refereed
920 1 _ |k ICG-4
|l Agrosphäre
|d 31.10.2010
|g ICG
|0 I:(DE-Juel1)VDB793
|x 1
970 _ _ |a VDB:(DE-Juel1)123234
980 _ _ |a VDB
980 _ _ |a ConvertedRecord
980 _ _ |a journal
980 _ _ |a I:(DE-Juel1)IBG-3-20101118
980 _ _ |a UNRESTRICTED
981 _ _ |a I:(DE-Juel1)IBG-3-20101118

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