Comment on "Nonreversible Adsorption of Divalent Metal Ions (MnII, CoII, NiII, CuII, and PbII) onto Goethite: Effects of Acidification, FeII Addition, and Picolinic Acid Addition." (comment on B.R. Coughlin and A.T. Stone, Environmental Science & Technology, vol. 29, p. 2445, 1995)
Article Abstract:
The best-fit criteria of minimizing the sum of the square of the residuals does not offer definitive proof on the adsorption of picolinic acid onto goethite. This is because it appears to require that the overall shape of the data set and model results be factored in. A more accurate approach would possibly be the surface interaction, wherein the picolinic acid molecule is bound to the surface via the carboxylic acid functional group and N forms a coordinative bond to a neighboring surface site.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Nonreversible adsorption of divalent metal ions (MnII, CoII, NiII, CuII, and PbII) onto goethite: effects of acidification, FeII addition, and picolinic acid addition
Article Abstract:
Metal release processes are described in terms of subsurface environment chemical conditions. The study used goethite as a sorptive base for its metal ion sorption ability. pH adsorption isotherms for picolinic and nicotinic acid were observed with similar results compared with other carboxylic acids. Manganese yielded the greatest fractional percentage for adsorption, while copper, nickel, cobalt and lead generated similar results.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Response to comment on "Nonreversible adsorption of Divalent Metal Ions (MnII, CoII, NiII, CuII, and PbII) onto Goethite: Effects of Acidification, FeII Addition, and Picolinic Acid Addition." (reply to Colin G. Ong and James O. Leckie in this issue, p. 1411)
Article Abstract:
A clear distinction between inner-sphere and outer-sphere complexes can be achieved through spectroscopic studies, particularly nuclear magnetic resonance, or indirect methods such as pressure-jump studies and kinetic analyses. These experimental measurements can significantly enhance understanding of the processes concerning adsorption, as they include the effects of ionic strength on picolinic acid adsorption.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
User Contributions:
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