Effect of iron oxide coatings on zinc sorption mechanisms at the clay-mineral/water interface

Journal of Colloid and Interface Science
Maarten Nachtegaal, Donald L Sparks

Abstract

Oxide surface coatings are ubiquitous in the environment, but their effect on the intrinsic metal uptake mechanism by the underlying mineral surface is poorly understood. In this study, the zinc (Zn) sorption complexes formed at the kaolinite, goethite, and goethite-coated kaolinite surfaces, were systematically studied as a function of pH, aging time, surface loading, and the extent of goethite coating, using extended X-ray absorption fine structure (EXAFS) spectroscopy. At pH 5.0, Zn partitioned to all sorbents by specific chemical binding to hydroxyl surface sites. At pH 7.0, the dominant sorption mechanism changed with reaction time. At the kaolinite surface, Zn was incorporated into a mixed metal Zn-Al layered double hydroxide (LDH). At the goethite surface, Zn initially formed a monodentate inner-sphere adsorption complex, with typical Zn-Fe distances of 3.18 A. However, with increasing reaction time, the major Zn sorption mechanism shifted to the formation of a zinc hydroxide surface precipitate, with characteristic Zn-Zn bond distances of 3.07 A. At the goethite-coated kaolinite surface, Zn initially bonded to FeOH groups of the goethite coating. With increasing aging time however, the inclusion of Zn into a mixed Zn-Al...Continue Reading

References

Sep 18, 1999·Journal of Colloid and Interface Science·D PeakD L Sparks
Oct 26, 2000·Journal of Colloid and Interface Science·T P TrainorG A Parks
Mar 13, 2003·Environmental Science & Technology·Maarten Nachtegaal, Donald L Sparks
May 12, 2006·Journal of Synchrotron Radiation·T Ressler

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Citations

Aug 22, 2006·Journal of Colloid and Interface Science·Thipnakarin BoonfuengTrevor A Tyson
Mar 20, 2012·Environmental Science & Technology·Saengdao KhaokaewDonald L Sparks
Sep 28, 2012·Environmental Science & Technology·M Josick ComarmondMichael J Angove
Sep 30, 2014·Journal of Hazardous Materials·Paola CastaldiSalvatore Deiana
Jan 14, 2016·Environmental Science & Technology·Damien GuinoiseauMarc F Benedetti
Jun 3, 2008·Journal of Hazardous Materials·Xiaowu TangYunmin Chen
Apr 1, 2008·Journal of Hazardous Materials·Erdal Eren
Dec 25, 2007·Journal of Colloid and Interface Science·Wei LiGuangzhi He
May 28, 2014·Environmental Toxicology and Chemistry·Jan E Groenenberg, Stephen Lofts
Feb 7, 2006·Journal of Colloid and Interface Science·F A VegaM L Andrade
Apr 29, 2015·Journal of Contaminant Hydrology·Ishai DrorBrian Berkowitz
May 10, 2015·Journal of Hazardous Materials·Xuemei RenXiangke Wang
Jun 21, 2017·Environmental Toxicology and Chemistry·Xi ZhangYibing Ma
Apr 12, 2016·Journal of Environmental Quality·Jordan G HamiltonDerek Peak
Nov 30, 2016·Journal of Environmental Quality·Jordan G HamiltonDerek Peak
Jan 16, 2021·Journal of Hazardous Materials·Martin UríkPeter Matúš
Dec 2, 2020·The Science of the Total Environment·Guilherme LopesLuiz Roberto Guimarães Guilherme
Jan 19, 2010·Environmental Science & Technology·Kirk G ScheckelThabet M Tolaymat
Apr 18, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Juyoung HaGordon E Brown
Apr 29, 2021·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Dena L CologgiGemma Reguera
Sep 30, 2005·Environmental Science & Technology·Andreas VoegelinRuben Kretzschmar
Oct 22, 2021·The Science of the Total Environment·Beate KrokRainer U Meckenstock

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