Clay mineral adsorption affinity for heavy metals: Experimental results and atomic-scale insights; Applied Surface Science; Vol. 750
| Parent link: | Applied Surface Science.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 750.— 2026.— Article number 167935, 44 p. |
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| Autor corporatiu: | |
| Altres autors: | , , , , , , , , , |
| Sumari: | Title screen Clay minerals can serve as low-cost materials to remove heavy metals, yet how crystallochemical properties of clays govern their metal removal performance remains poorly understood. This study investigated Pb2+, Cd2+, and Hg2+ adsorption on montmorillonite (Mnt), illite (Ilt), kaolinite (Kln), and chlorite (Chl) at pH 7.0 using batch experiments and molecular dynamics (MD) simulations. Kinetic results revealed a metal removal order of Pb2+> Cd2+> Hg2+ for Mnt, Ilt, and Kln, while Chl showed Pb2+> Hg2+> Cd2+. Adsorption kinetic data fitted the pseudo-second-order model, indicating surface reaction limitation. All clays exhibited strong Pb2+ adsorption; Chl displayed specific Hg2+ affinity. MD simulation results showed that the source of layer charge determines interfacial binding forms. Octahedral substitution in Mnt generates extensive electrostatic fields for Pb2+ outer-sphere complexation, while tetrahedral charge in Ilt and Chl creates localized electric fields to trigger partial cation dehydration and inner-sphere coordination of Cd2+ and Hg2+. Hg2+ binding in Chl stems from favorable Hg2+-siloxane surface interactions. Basal surface properties primarily govern overall metal uptake trends despite edge surfaces contributing to low-concentration metal retention. This work provides guidance for clay sorbent screening and clarifies the microstructure-adsorption relationship at the atomic level Текстовый файл AM_Agreement |
| Idioma: | anglès |
| Publicat: |
2026
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| Matèries: | |
| Accés en línia: | https://doi.org/10.1016/j.apsusc.2026.167935 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=688480 |
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| 200 | 1 | |a Clay mineral adsorption affinity for heavy metals: Experimental results and atomic-scale insights |f Hongling Bu, Hanjie Chen, M. Rudmin [et al.] | |
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| 300 | |a Title screen | ||
| 320 | |a References: 75 tit | ||
| 330 | |a Clay minerals can serve as low-cost materials to remove heavy metals, yet how crystallochemical properties of clays govern their metal removal performance remains poorly understood. This study investigated Pb2+, Cd2+, and Hg2+ adsorption on montmorillonite (Mnt), illite (Ilt), kaolinite (Kln), and chlorite (Chl) at pH 7.0 using batch experiments and molecular dynamics (MD) simulations. Kinetic results revealed a metal removal order of Pb2+> Cd2+> Hg2+ for Mnt, Ilt, and Kln, while Chl showed Pb2+> Hg2+> Cd2+. Adsorption kinetic data fitted the pseudo-second-order model, indicating surface reaction limitation. All clays exhibited strong Pb2+ adsorption; Chl displayed specific Hg2+ affinity. MD simulation results showed that the source of layer charge determines interfacial binding forms. Octahedral substitution in Mnt generates extensive electrostatic fields for Pb2+ outer-sphere complexation, while tetrahedral charge in Ilt and Chl creates localized electric fields to trigger partial cation dehydration and inner-sphere coordination of Cd2+ and Hg2+. Hg2+ binding in Chl stems from favorable Hg2+-siloxane surface interactions. Basal surface properties primarily govern overall metal uptake trends despite edge surfaces contributing to low-concentration metal retention. This work provides guidance for clay sorbent screening and clarifies the microstructure-adsorption relationship at the atomic level | ||
| 336 | |a Текстовый файл | ||
| 371 | 0 | |a AM_Agreement | |
| 461 | 1 | |t Applied Surface Science |c Amsterdam |n Elsevier Science Publishing Company Inc. | |
| 463 | 1 | |t Vol. 750 |v Article number 167935, 44 p. |d 2026 | |
| 610 | 1 | |a Clay minerals | |
| 610 | 1 | |a Heavy metal adsorption | |
| 610 | 1 | |a Adsorption affinity | |
| 610 | 1 | |a Wastewater remediation | |
| 610 | 1 | |a Molecular dynamics | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 0 | |a Bu Hongling | |
| 701 | 0 | |a Hanjie Chen | |
| 701 | 1 | |a Rudmin |b M. A. |c geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of Geological and Mineralogical Sciences |f 1989- |g Maksim Andreevich |9 16999 | |
| 701 | 0 | |a Wenpo Xu | |
| 701 | 0 | |a Zhang Chi | |
| 701 | 0 | |a Junjie Wang | |
| 701 | 0 | |a Meiqing Chen | |
| 701 | 0 | |a Ziming Xu | |
| 701 | 0 | |a Yun Li | |
| 701 | 0 | |a Wenbin Yu | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа природных ресурсов |c (2017- ) |9 28300 |
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