Paper Details
Bibliographic Data:
Code: |
CS95 |
Paper Type: |
Article |
Author(s): |
Coughlin BR, Stone AT |
Title: |
Nonreversible Adsorption of Divalent Metal Ions (Mn(II), Co(II), Ni(II), Cu(II), and Pb(II)) onto Goethite: Effects of Acidification, FeII Addition, and Picolinic Acid Addition |
Journal: |
Environmental Science & Technology
Volume: 29 Year: 1995 Pages: 2445-2455
ISSN-Print: 0013-936X |
Internal Storage: |
V1069 |
DOI: |
10.1021/es00009a042 |
Abstract: |
Differences in the coordination chemistry of divalent metal ions affect their adsorption onto goethite (a-FeOOH) surfaces and their subsequent release by acidification, Fell addition, and picolinic acid addition. Equilibrium constants for adsorption onto FeOOH (goethite) decrease in the order: CuII > PbII > NiII = CoII > MnII. Equilibrium constants for picolinic acid complexation follow the Irving-Williams series; complex formation
with PbII and MnII is nearly negligible.
Divalent metal ion release 24 h following acidification or picolinic acid addition is typically less than the amount predicted using an equilibrium speciation model, indicating adsorption/desorption hysteresis. Experiments performed under strict exclusion of O2 reveal a slight increase in CoII, NiII, and CuII adsorption upon the addition of 1000 pM FeII. FeII interferes with the ability of picolinic acid to cause divalent metal ion release. |
Comment: |
cited in [OL97] |
Surface Area
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Site Density / Protolysis
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Complex Formation
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Formatted Citation
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