دورية أكاديمية
Solid-liquid partitioning and speciation of Pb(II) and Cd(II) on goethite under high pH conditions, as examined by subnanomolar heavy metal analysis, X-ray absorption spectroscopy, and surface complexation modeling.
| العنوان: | Solid-liquid partitioning and speciation of Pb(II) and Cd(II) on goethite under high pH conditions, as examined by subnanomolar heavy metal analysis, X-ray absorption spectroscopy, and surface complexation modeling. |
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| المؤلفون: | Takeda N; Division of Natural System, Graduate School of Natural Science, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan., Fukushi K; Institute of Nature and Environmental Technology, Kanzawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan. Electronic address: fukushi@staff.kanazawa-u.ac.jp., Okuyama A; Division of Natural System, Graduate School of Natural Science, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan., Takahashi Y; Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan. |
| المصدر: | Chemosphere [Chemosphere] 2024 Sep; Vol. 363, pp. 142766. Date of Electronic Publication: 2024 Jul 04. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Science Ltd Country of Publication: England NLM ID: 0320657 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1298 (Electronic) Linking ISSN: 00456535 NLM ISO Abbreviation: Chemosphere Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Oxford : Elsevier Science Ltd Original Publication: Oxford, New York, : Pergamon Press. |
| مواضيع طبية MeSH: | Lead*/chemistry , Cadmium*/chemistry , Cadmium*/analysis , Iron Compounds*/chemistry , Metals, Heavy*/chemistry , Metals, Heavy*/analysis , Minerals*/chemistry , X-Ray Absorption Spectroscopy*, Hydrogen-Ion Concentration ; Adsorption ; Models, Chemical |
| مستخلص: | The adsorption of heavy metals on iron oxides generally increases with pH and is almost complete at neutral to slightly alkaline pH. However, almost complete adsorption on a linear scale does not imply sufficient removal of the heavy metals in terms of their toxicity. Here, we elucidated the chemical reactions that determine the solid-liquid partitioning of Pb(II) and Cd(II) on goethite at high pH. While the removal of both heavy metals was almost complete on a linear scale above pH 7 for Pb(II) and pH 9 for Cd(II), the dissolved metal concentrations decreased on a logarithmic scale with pH, reaching minima at around pH 10 for Pb(II) and pH 10-11 for Cd(II), and then they increased with pH thereafter. The XAFS spectra of Pb(II)- or Cd(II)-adsorbed goethite prepared at pH > 11 were almost the same as those at neutral pH, suggesting that removal of the heavy metals from solution was achieved by a single adsorption reaction over the entire pH range. Based on the observed macroscopic and microscopic adsorption behaviors at high pH, a robust surface complexation model was developed to predict the solid-liquid partitioning of divalent heavy metals over the entire pH range. Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2024 Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Adsorption; Cadmium; Goethite; High pH; Lead; Surface completion modeling; XAFS |
| المشرفين على المادة: | 2P299V784P (Lead) 00BH33GNGH (Cadmium) 1310-14-1 (goethite) 0 (Iron Compounds) 0 (Metals, Heavy) 0 (Minerals) |
| تواريخ الأحداث: | Date Created: 20240705 Date Completed: 20240820 Latest Revision: 20240820 |
| رمز التحديث: | 20240820 |
| DOI: | 10.1016/j.chemosphere.2024.142766 |
| PMID: | 38969214 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1298 |
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| DOI: | 10.1016/j.chemosphere.2024.142766 |