Applied Clay Science最新文献_第3页

Salinity Controls on Steel Biocorrosion relevant to the Disposal of High-level Radioactive Waste

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-04 DOI: 10.1016/j.clay.2025.107723

M.N. Rose , C. Boothman , S. Shaw , K. Morris , D.L. Engelberg , M.T. Bailey , J.R. Lloyd

{"title":"Salinity Controls on Steel Biocorrosion relevant to the Disposal of High-level Radioactive Waste","authors":"M.N. Rose , C. Boothman , S. Shaw , K. Morris , D.L. Engelberg , M.T. Bailey , J.R. Lloyd","doi":"10.1016/j.clay.2025.107723","DOIUrl":"10.1016/j.clay.2025.107723","url":null,"abstract":"<div><div>In a geological disposal facility (GDF) for spent fuel and high-level radioactive waste, the canister serves as one of the main engineered barriers. The resistance of the canister to degradation processes such as microbially influenced corrosion (MIC) needs be characterised to support GDF environmental safety cases. Here the impacts of salinity on sulfate-reducing bacterial (SRB) activity and associated MIC were explored in 84-day batch incubations at 30 °C. A 5 % standard bentonite slurry (MX80) in a low-salinity (0.1 g l<sup>−1</sup> NaCl) artificial groundwater containing lactate added as an electron donor provided suitable conditions for the proliferation of SRB. Corrosion rates of carbon steel (080-A15) coupon surfaces in microcosms amended with lactate were > 2.5 times greater than those absent of lactate, and sterile controls. At an increased salinity of 12.4 g l<sup>−1</sup>, adding lactate resulted in 2 times the corrosion depth of sterile conditions, but at 50 g l<sup>−1</sup> there was no detected microbial activity, and no pronounced increase in corrosion by adding lactate compared to sterile controls. Here, microbial activity and subsequent MIC was suppressed at high salinity (50 g l<sup>−1</sup>) suggesting that groundwater composition played a controlling role in SRB biocorrosion. The relevance to geodisposal scenarios, where bentonite is used to protect and support the waste canister, is discussed.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107723"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on CO₂ adsorption of illite and its microstructural characterization post adsorption: High-pressure and supercritical tests

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-03 DOI: 10.1016/j.clay.2025.107738

Xianfeng Ma , Guohang Tang , Fawu Wang , Jianglin Cao , Bolong Ma , Haihua Zhang

{"title":"Study on CO₂ adsorption of illite and its microstructural characterization post adsorption: High-pressure and supercritical tests","authors":"Xianfeng Ma , Guohang Tang , Fawu Wang , Jianglin Cao , Bolong Ma , Haihua Zhang","doi":"10.1016/j.clay.2025.107738","DOIUrl":"10.1016/j.clay.2025.107738","url":null,"abstract":"<div><div>Illite, a prevalent clay mineral, is extensively found in sedimentary rocks, weathering crusts, and soils. Its adsorption capacity has attracted considerable interest for carbon dioxide (CO₂) geological sequestration research. This study aimed to investigate the fundamental CO₂ adsorption behavior of illite, as well as the effects of moisture content and temperature on this process, utilizing high-pressure adsorption and supercritical adsorption tests. Nitrogen adsorption tests were conducted to assess the variations in specific surface area, pore volume, and average pore size of illite before and after CO₂ adsorption. Additionally, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) techniques were employed to characterize the mineral composition and elemental characteristics of raw illite, CO₂-adsorbed illite under dry conditions, and CO₂-adsorbed illite under wet conditions. The results indicated that an increase in moisture content diminishes CO₂ adsorption capacity of illite and leads to a transition of the isosteric heat of adsorption from positive to negative. Furthermore, with rising temperature and moisture content, the specific surface area, pore volume, and average pore size of illite increased following CO₂ adsorption. Additionally, CO₂ adsorption modified the mineral and elemental composition of illite. These results were essential for enhancing the fundamental understanding of CO₂ geological sequestration efficiency and hold promise as a technical foundation for engineering applications.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107738"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of effective diffusion properties based on 3D FIB/SEM images of clays

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-03 DOI: 10.1016/j.clay.2025.107717

Fares Bennai , Mohamed Khaled Bourbatache , Tien Dung Le , Mahdia Hattab , Olivier Millet

{"title":"Determination of effective diffusion properties based on 3D FIB/SEM images of clays","authors":"Fares Bennai , Mohamed Khaled Bourbatache , Tien Dung Le , Mahdia Hattab , Olivier Millet","doi":"10.1016/j.clay.2025.107717","DOIUrl":"10.1016/j.clay.2025.107717","url":null,"abstract":"<div><div>This article presents a numerical approach aiming to estimate the effective diffusion properties of clay using real 3D images obtained through Focused Ion Beam and Scanning Electron Microscopy (FIB/SEM). A description of the original FIB/SEM procedure, specifically developed for observing remoulded clays at the particle scale, is presented. Image processing allowed the reconstruction of a micro-volume extracted from a clay sample subjected to an oedometric loading with an effective vertical stress of 1000 kPa. Numerical calculations of effective diffusivity were performed on the real 3D images using periodic homogenization technique. The results revealed anisotropy in the diffusion phenomena of the studied clay: the effective diffusion coefficient is lower along the direction of the mechanical loading and higher in the plane normal to the stress axis. These findings are consistent with quantitative pore orientation results obtained through image processing, where it was shown that, after mechanical loading, the pores tend to orient towards the plane normal to the axis of the effective vertical stress. These results demonstrate that incorporating the real geometry of clay microstructure into diffusion property calculations allows for a better consideration of the complexity of the clay fabric in relation to mechanical loading.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107717"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flame-retardant effect of scalable all clay composite films

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-03 DOI: 10.1016/j.clay.2025.107724

Yixuan Fu , Zhaoyi Wang , Huiquan Liu , Ke Zhang , Lunxiang Zhang , Yongchen Song , Peng Wu , Yanghui Li , Zheng Ling

{"title":"Flame-retardant effect of scalable all clay composite films","authors":"Yixuan Fu , Zhaoyi Wang , Huiquan Liu , Ke Zhang , Lunxiang Zhang , Yongchen Song , Peng Wu , Yanghui Li , Zheng Ling","doi":"10.1016/j.clay.2025.107724","DOIUrl":"10.1016/j.clay.2025.107724","url":null,"abstract":"<div><div>Flame retardants reduce fire risks from everyday materials that sustain a high standard of living. There is growing interest in applying surface treatments to localize flame-retardant chemistry at the surface of combustible material. This popular treatment method aims to maintain the desired bulk properties of materials and reduce the quantity of additives required. Owing to the excellent thermal stability, low cost and lightweight, clay nanomaterials are potential as environmentally friendly, lightweight, and practical flame-retardant materials. However, such potential may be restricted by the slow, tedious, energy-intensive, and unscalable fabrication process. Herein, large-area and flexible clay nanocomposite lamellar films with excellent thermal stability were fabricated by a simple and rapid doctor-blade coating method. The clay lamellar films can be applied to the surface of combustible materials to insulate them from heat and oxygen to provide a flame-retardant effect. By regulating the thickness of films and folding the films multiple times, the flame spread area decreased by 97.3 % and the total smoke production decreased by 74.7 % compared to the pure basswood board, showing excellent fire-retardancy. The large-area clay lamellar films made with simple processes and low-cost materials prove new strategies for efficient and environmentally friendly flame-retardant.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107724"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-friendly design of active montmorillonite nanofillers for reinforcing the anti-corrosion property of epoxy coating

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-02 DOI: 10.1016/j.clay.2025.107739

Xianliang Li, Yawei Shao, Yanqiu Wang, Junyi Wang

{"title":"Eco-friendly design of active montmorillonite nanofillers for reinforcing the anti-corrosion property of epoxy coating","authors":"Xianliang Li, Yawei Shao, Yanqiu Wang, Junyi Wang","doi":"10.1016/j.clay.2025.107739","DOIUrl":"10.1016/j.clay.2025.107739","url":null,"abstract":"<div><div>In this work, a montmorillonite (MMT)-based composite coating with long-term corrosion protection for mild steel was prepared. This composite coating incorporated the montmorillonite@polydopamine@cerium phytate (MMT@PDA@PACe) nanofiller, prepared by the easily layer-by-layer surface assembly method. Electrochemical impedance spectroscopy (EIS) and surface morphology studies showed that the prepared composite coating exhibited long-term protective performance, self-healing performance, and good integrity. In this instance, on the one hand, two-dimensional (2D) MMT could block the path of corrosive media penetrating the coating. Also, organic modification of PDA and PACe could enhance the dispersibility and compatibility of inorganic MMT fillers, thus enhancing the coating barrier effect. On the other hand, composite materials could perceive corrosion reactions and actively release corrosion inhibitors to improve corrosion resistance performance further. The coating's self-healing performance and release characteristics of corrosion inhibitors were investigated by the EIS and inductively coupled plasma optical emission spectrometer (ICP-OES) tests. Moreover, after 60 d immersion, the <em>|Z|</em><sub>0.01 Hz</sub> value of the 0.5 wt% MMT@PDA@PACe composite coating was over 10<sup>9</sup> Ω·cm<sup>2</sup>, which is 3 orders of magnitude higher than that of the bare coating. Simultaneously, the adhesive force studies were applied to the composite coatings, and the results illustrated that the coating had the highest dry conditions adhesion force with 5.43 MPa and the lowest adhesion force loss rate at 14.1 % after 30 d of immersion.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107739"},"PeriodicalIF":5.3,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clay minerals formation in MgO-SiO2-H2O low temperature system by hydrothermal synthesis: A study in function of Mg/Si molar ratio and pH

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2024.107647

Alexandra Jourdain , Patrick Dutournié , Laure Michelin , Jean-Marc Le Meins , Jocelyne Brendlé , Nicolas Michau , Christelle Martin , Liva Dzene

{"title":"Clay minerals formation in MgO-SiO2-H2O low temperature system by hydrothermal synthesis: A study in function of Mg/Si molar ratio and pH","authors":"Alexandra Jourdain , Patrick Dutournié , Laure Michelin , Jean-Marc Le Meins , Jocelyne Brendlé , Nicolas Michau , Christelle Martin , Liva Dzene","doi":"10.1016/j.clay.2024.107647","DOIUrl":"10.1016/j.clay.2024.107647","url":null,"abstract":"<div><div>Magnesium only-phyllosilicates such as serpentines (1:1) and stevensite (2:1) do exist in nature but are not abundant in pure form, whereas synthesized materials can ensure higher purity. Clay mineral hydrothermal synthesis is quite easy to perform, however, the condensation reactions leading to the formation of these phyllosilicates and their precursors are not well understood. Such knowledge would allow to predict the synthesis outcome in case of variation of experimental parameters. This study reports a chemical reaction mechanism explaining the parameters that are determining the type of the formed clay mineral. After a detailed characterization of each obtained phase, it is shown that pH has a lower effect compared to Mg to Si molar ratio. Our results show that above pH 10 the mechanisms of lizardite and stevensite formation are similar with the same elementary units, but that the type of material obtained depends on the availability in excess of magnesium (formation of lizardite) or silicon (formation of stevensite).</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"264 ","pages":"Article 107647"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile modification of sepiolite and its application in wear-resistant and superhydrophobic epoxy coatings by mimicking the structure of shark skin

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2024.107642

Na Sun , Zhanfeng Hou , Zeshang Jiang , Jieting Geng , Lin Xia

{"title":"Facile modification of sepiolite and its application in wear-resistant and superhydrophobic epoxy coatings by mimicking the structure of shark skin","authors":"Na Sun , Zhanfeng Hou , Zeshang Jiang , Jieting Geng , Lin Xia","doi":"10.1016/j.clay.2024.107642","DOIUrl":"10.1016/j.clay.2024.107642","url":null,"abstract":"<div><div>Superhydrophobic surfaces have demonstrated significant potential in various fields. Nonetheless, creating durable superhydrophobic surfaces with practical application value remains a major challenge. This study utilizes biomimicry to prepare a series of composites similar to shark skin, which possesses hydrophobic and wear-resistant properties. A dual-coating strategy was developed to create a durable and wear-resistant superhydrophobic surface. This article introduces a novel approach by incorporating chemically modified sepiolite and graphite nanoparticles in a layer-by-layer composite for enhancing wear resistance in epoxy resin coatings. Epoxy resin (EP) was used as the matrix material, graphite nanoparticles (GNP) were incorporated for the wear-resistant layer, and modified superhydrophobic Sepiolite (osSep) particles were utilized for the superhydrophobic layer. Both of these layers could form hydrogen bonds with epoxy resin, leading to a functional coating that offers wear resistance, superhydrophobicity, chemical stability, and self-cleaning properties. This article applies EP@GNP@osSep composites to glass, wood, and stainless steel mesh, imparting excellent superhydrophobic properties, wear resistance, self-cleaning abilities, and anti-staining properties. The superhydrophobic coating prepared in this manuscript can meet the requirements of robustness and superhydrophobicity for various materials, with promising market potential.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"264 ","pages":"Article 107642"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preface to Clays for Earth, Health and Environment: A contribution from EuroClay 2023

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2024.107645

引用次数: 0

Multiscale and quantitative study of thermal conductivity in shale using TDTR measurements and homogenization techniques

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2025.107719

Lingzhi Xie , Chuanqing Yu , Yao Zhang , Bo He , Runxi Wang , Jun Liu

{"title":"Multiscale and quantitative study of thermal conductivity in shale using TDTR measurements and homogenization techniques","authors":"Lingzhi Xie , Chuanqing Yu , Yao Zhang , Bo He , Runxi Wang , Jun Liu","doi":"10.1016/j.clay.2025.107719","DOIUrl":"10.1016/j.clay.2025.107719","url":null,"abstract":"<div><div>Elevated temperatures in shale reservoirs are unavoidable during deep shale gas extraction. Thermal conductivity is an essential determinant influencing numerous heat-related activities. Nonetheless, comprehending the thermal conductivity of shale is difficult due to its varied mineral compositions, intricate microstructural characteristics, and the absence of direct measurement techniques. This study addresses these problems by utilizing Time-Domain Thermoreflectance (TDTR) technology, which offers accurate measurements of the thermal properties of mineral phases (at micrometer scale) in shale, such as clay and quartz. The test findings indicate that the clay matrix demonstrates a thermal conductivity of 1.98 W/(m·K) parallel to the bedding and 1.65 W/(m·K) perpendicular to it, whereas quartz displays an isotropic value of 6.94 W/(m·K) in both directions. A two-step homogenization methodology has been developed that accurately represents the layering distribution of grains and accounts for the anisotropic behavior of the clay matrix, integrating the Mori-Tanaka method within lamina and series-parallel models within lamina. The precision of this homogenization process is confirmed by further macroscopic measurements utilizing the laser flash technique, exhibiting an error margin of 5 %. Additionally, quantitative study evaluates the influence of four variables on the anisotropy of thermal conductivity by ANOVA. The findings indicate that the anisotropy of thermal conductivity is predominantly influenced by the orientation of the clay matrix.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107719"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Holographic characterization of typical silicate minerals by terahertz time-domain spectroscopy

IF 5.3 2区地球科学

Applied Clay Science Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2025.107720

Haochong Huang , Xinyu Li , Zhiyuan Zheng , Hanhan Fan , Caiqin Liu , Enhui Yuan , Jialu Gu , Yutong Ma , Qian Xu , Spozmai Panezai , Shanshan Li , Zhuo Zhang , Dexin Sun , Kunfeng Qiu

{"title":"Holographic characterization of typical silicate minerals by terahertz time-domain spectroscopy","authors":"Haochong Huang , Xinyu Li , Zhiyuan Zheng , Hanhan Fan , Caiqin Liu , Enhui Yuan , Jialu Gu , Yutong Ma , Qian Xu , Spozmai Panezai , Shanshan Li , Zhuo Zhang , Dexin Sun , Kunfeng Qiu","doi":"10.1016/j.clay.2025.107720","DOIUrl":"10.1016/j.clay.2025.107720","url":null,"abstract":"<div><div>The Deep-Time Digital Earth Plan aims to develop a comprehensive digital representation of Earth's global systems, a goal that requires extensive mineralogical data and substantial scientific information. While traditional mineralogical characterization provides critical insights into the mantle's water cycle and geological evolution, existing geological methodologies face challenges due to electromagnetic band gaps and limitations in phase utilization. Leveraging the unique properties of water-sensitive, coherent, and fingerprint spectra, this study introduced Terahertz (THz) spectroscopy as a new method for validating holographic “THz colors” under pyrolytic and optical conditions. This approach enabled the simultaneous analysis of amplitude, phase, and spectral distribution for typical silicate minerals, facilitating the development of a comprehensive library of THz spectra for mineral materials. This library was constructed with support from conventional X-ray and infrared tools. Our research identified several minerals with THz characteristic absorption peaks, including pyrophyllite at 1.10 THz and chamosite at 1.15 THz. These findings challenged existing perceptions in the THz community regarding raw mineral. The experimental results demonstrated the potential of THz technology as a transformative tool for mineral detection and geological analysis, integrating optics and geophysics. Moreover, this advancement provides significant insights and enhances the development of digital Earth models and study of mineral morphology on Earth's surface.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107720"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0