Surface Chemistry of Minerals

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Crystallography and Physical Chemistry of Minerals & Nanominerals".

Deadline for manuscript submissions: closed (20 July 2024) | Viewed by 4189

Special Issue Editors


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Guest Editor
Los Alamos National Laboratory, MST-8 Group, Materials Science and Technology Division, Los Alamos, NM 87545, USA
Interests: mineral surface chemistry; reaction kinetics; aqueous geochemistry; mineralogy; soil quality and fertility; X-ray and particle beam techniques

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Guest Editor
SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
Interests: aqueous geochemistry; soil science; biogeochemical cycling; X-ray fluorescence mapping and X-ray absorption spectroscopy

Special Issue Information

Dear Colleagues,

Mineral surface reactivity controls a range of natural and engineered processes, including mineral weathering, contaminants mobilization, and groundwater chemistry. This surface reactivity is important in a variety of scenarios, such as nuclear energy/storage (e.g., material performance under extreme conditions), environmental (bioavailability, contaminant, and nutrient), and for nuclear forensic purposes (corrosion). To understand and predict the material behavior, it is important to understand the surface chemistry of these materials.

For this Special Issue, we invite studies that investigate mineral surface chemistry on a variety of length scales using a range of theoretical and experimental methods. We particularly encourage studies that use a combination of atomistic and molecular scale techniques that employ, among others, X-ray and/or neutron particle analysis tools, studying both natural and/or technical systems.

Dr. Arjen Van Veelen
Dr. Eleanor Spielman-Sun
Guest Editors

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Keywords

  • surface chemistry
  • applied geochemistry
  • soil science
  • mineral reaction kinetics
  • adsorption/desorption
  • contaminant mobilization
  • mineral surface reactivity
  • surface characterization
  • synchrotron/neutron
  • X-rays
  • MD/DFT

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Published Papers (2 papers)

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12 pages, 1401 KiB  
Article
Adsorption Behaviors of Lanthanum (III) and Yttrium (III) Ions on Gibbsite
by Zongke Zhou, Quan Wan, Wenbin Yu, Xin Nie, Shuguang Yang, Shuqin Yang and Zonghua Qin
Minerals 2023, 13(12), 1530; https://doi.org/10.3390/min13121530 - 9 Dec 2023
Cited by 4 | Viewed by 2237
Abstract
The enrichment process of rare earth elements in ion-adsorbed rare earth ores and bauxite is potentially related to the adsorption of rare earth elements by gibbsite. In this paper, lanthanum and yttrium were selected as surrogates of light rare earth elements and heavy [...] Read more.
The enrichment process of rare earth elements in ion-adsorbed rare earth ores and bauxite is potentially related to the adsorption of rare earth elements by gibbsite. In this paper, lanthanum and yttrium were selected as surrogates of light rare earth elements and heavy rare earth elements, respectively. The effects of adsorption time, solution pH, and background electrolyte concentration on the adsorption of rare earth ions by gibbsite were investigated through batch adsorption experiments. The results showed that the adsorption of rare earth ions by gibbsite can approach equilibrium in 72 h. There is mainly electrostatic repulsion between gibbsite and rare earth ions at pH 4–7, and the adsorption efficiency increases with the increase in solution pH value and background electrolyte concentration. The adsorption process of rare earth ions by gibbsite is more consistent with the pseudo-second-order kinetic and Langmuir single-layer adsorption models. Moreover, based on the structural correlation between clay minerals and gibbsite, the causes for the differences in the adsorption behaviors of rare earth elements on the minerals are discussed. The results of this study help to understand the role of aluminum hydroxide in the migration and fate of rare earth elements in epigenetic environments. Full article
(This article belongs to the Special Issue Surface Chemistry of Minerals)
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8 pages, 1326 KiB  
Comment
Comment on Zhou et al. Adsorption Behaviors of Lanthanum (III) and Yttrium (III) Ions on Gibbsite. Minerals 2023, 13, 1530
by Bahram Hosseini Monjezi and Johannes Lützenkirchen
Minerals 2024, 14(11), 1137; https://doi.org/10.3390/min14111137 - 11 Nov 2024
Cited by 1 | Viewed by 1154
Abstract
We compare trends in experimental observations reported by Zhou et al. to relevant results from numerous previously published studies. Based on these comparisons, we question the reliability of the gibbsite titration data and consider the cation uptake curves to be incomplete and questionable [...] Read more.
We compare trends in experimental observations reported by Zhou et al. to relevant results from numerous previously published studies. Based on these comparisons, we question the reliability of the gibbsite titration data and consider the cation uptake curves to be incomplete and questionable as well. The adsorption edges in Zhou et al. are too flat compared to the typical adsorption edges reported in hundreds of studies. Finally, we are convinced that trends of cation adsorption with NaNO3 content not only disagree with relevant, previously published results, but are even opposite to trends expected with increasing ionic strength, whenever such effects are observed. Finally, we discuss other inconsistencies in the experimental data. Full article
(This article belongs to the Special Issue Surface Chemistry of Minerals)
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