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ADSORPTION OF PROTONS, FE(II) AND AL(III) ON LEPIDOCROCITE (GAMMA-FEOOH)
Zhang, Y.; Charlet, L.; Schindler, P. W.
1992
Source PublicationColloids and Surfaces
Issue3-4Pages:259-268
AbstractThe adsorption of H+, Fe2+ and Al3+ from solutions at the gamma-FeOOH electrolyte interface has been investigated. The experimental data could be described by the surface equilibria: p H+ + q = FeOH + r M(m+) = H(p)(=FeOH)(q)M(r)(p + mr)+ and the subsequent intrinsic stability constants beta(s)p,q,r(int): adsorption of H+:log beta(s)-1,1,0(int) = 6.45; log beta(s)-1,1,0(int) = -8.13 adsorption of Al3+:log beta(s)-2,1,1(int) = -2.74; log beta(s)-3,1,1(int) = -9.53 adsorption of Fe2+:log beta(s)-1,1,1(int) = -2.13; log beta(s)-2,1,1(int) = -8.53. These constants were obtained at 298.2 K in a 0.6 mol dm-3 NaCl ionic medium, assuming an electrical double layer of constant capacitance. The optimum values for the surface-site density and specific capacitance are 1.67 sites nm-2 and 2.08 F m-2 respectively. This study supports the earlier presumption of Fe2+ adsorption being involved in the crystal growth of lepidocrocite or in its transformation to goethite or magnetite. Co-adsorption of Fe2 and Co2+ as a basis for manufacturing Co-doped Fe(III) hydroxides is discussed.
KeywordAluminum(Iii) Crystal Growth Lepidocrocite Iron(Ii) Surface Complexation Acid-base Reactions Water Interface Iron(Ii) Ion Surface Oxidation Goethite Oxide Complexation Transformation Suspensions
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Indexed BySCI
Language英语
WOS IDWOS:A1992HW43300007
Citation statistics
Cited Times:78[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/7978
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Zhang, Y.,Charlet, L.,Schindler, P. W.. ADSORPTION OF PROTONS, FE(II) AND AL(III) ON LEPIDOCROCITE (GAMMA-FEOOH)[J]. Colloids and Surfaces,1992(3-4):259-268.
APA Zhang, Y.,Charlet, L.,&Schindler, P. W..(1992).ADSORPTION OF PROTONS, FE(II) AND AL(III) ON LEPIDOCROCITE (GAMMA-FEOOH).Colloids and Surfaces(3-4),259-268.
MLA Zhang, Y.,et al."ADSORPTION OF PROTONS, FE(II) AND AL(III) ON LEPIDOCROCITE (GAMMA-FEOOH)".Colloids and Surfaces .3-4(1992):259-268.
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