Clay Minerals最新文献_第2页

Changes in the basic structure and strength deterioration of clay minerals with different hydration degrees 不同水化程度下粘土矿物基本结构变化及强度劣化

4区地球科学

Clay Minerals Pub Date : 2023-10-06 DOI: 10.1180/clm.2023.29

Jiyu Lin, Daoyong Wu, Jiwei Jia, Jing Yan, Lingtong Cai

引用次数: 0

Microstructural observations of clay-hosted pores in black shales: Implications for porosity preservation and petrophysical variability 黑色页岩中粘土孔隙的微观结构观察:孔隙保存和岩石物理变异性的意义

4区地球科学

Clay Minerals Pub Date : 2023-10-05 DOI: 10.1180/clm.2023.28

Hongjian Zhu, Shuangjian Li, Zongquan Hu, Yiwen Ju, Yanyan Pan, Manping Yang, Yanjun Lu, Mingbo Wei, Weidong Qian

{"title":"Microstructural observations of clay-hosted pores in black shales: Implications for porosity preservation and petrophysical variability","authors":"Hongjian Zhu, Shuangjian Li, Zongquan Hu, Yiwen Ju, Yanyan Pan, Manping Yang, Yanjun Lu, Mingbo Wei, Weidong Qian","doi":"10.1180/clm.2023.28","DOIUrl":"https://doi.org/10.1180/clm.2023.28","url":null,"abstract":"Abstract Typical unconventional gas/liquid plays of China were studied using field-emission/focused ion beam scanning electron microscopy (SEM) for clay mineralogy and microstructural development. The SEM microstructural investigations of clay-rich shale and mudstone reservoirs provided significant information about clay mineral type, size, distribution and aggregates, which allows for interpretations regarding porosity preservation and petrophysical variability. The major clay-hosted porosity types are interparticle clay pores, intraparticle clay pores and aggregate pores. Interparticle clay pores occur in open spaces of the clay aggregates and include four subtypes: (1) elongated pores, (2) packed pores, (3) jagged pores and (4) card-house pores. Intraparticle clay pores are present within clay particles and have mostly secondary origin. These pores are diagenesis dependent and are restricted to secondary illite particles during the transformation of clay minerals from smectite to illite. Intraparticle clay pores constitute only isolated porosity and could not contribute to hydrocarbon molecule storage and migration. Aggregate pores were predominantly encountered in association with organic–clay and pyrite–clay aggregates. In places, organic–pyrite–clay aggregates can also display polymerization, but they do not contribute significantly to overall porosity and permeability. Combining SEM morphological analyses with the software ImageJ is critical in clay microstructure and porosity analyses via semi-quantitative characterization of the 3D pore surface, 2D pore profile, pore quantity, pore size, areal porosity, etc . These visual and semi-quantitative results highlight the significance of jagged pores and pyrite–clay aggregate pores in shale gas/liquid reservoirs because they may be important facilitators of gas storage and transmission.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134947471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Chemical and mineralogical reactions of bentonites in geotechnical barriers at elevated temperatures – review of experimental evidence and modelling progress 高温下土工屏障中膨润土的化学和矿物学反应——实验证据和模型进展综述

4区地球科学

Clay Minerals Pub Date : 2023-09-11 DOI: 10.1180/clm.2023.26

S. Kaufhold, R. Dohrmann, I. Wallis, Ch. Weber

{"title":"Chemical and mineralogical reactions of bentonites in geotechnical barriers at elevated temperatures – review of experimental evidence and modelling progress","authors":"S. Kaufhold, R. Dohrmann, I. Wallis, Ch. Weber","doi":"10.1180/clm.2023.26","DOIUrl":"https://doi.org/10.1180/clm.2023.26","url":null,"abstract":"Abstract Bentonites are proposed to be used as buffers in high-level radioactive waste repositories. The elevated temperatures in repositories may, however, affect bentonites’ desired properties. For instance, heating under dry conditions can cause cation fixation, potentially affecting swelling properties. The kinetics of mineral dissolution and precipitation reactions will equally be influenced by temperature. Redistributions of Ca-sulphates and -carbonates have been observed, as well as illitization of smectite. Illitization, however, has only been observed in laboratory experiments at large solution/solid ratios, whereas it has not yet been unambiguously identified in large-scale experiments. In many large-scale tests, cation exchange is the first observable geochemical reaction. In addition, an enrichment of Mg close to the heater is found in many such tests. The thermal gradient and (incongruent) smectite dissolution are suspected to play a role with respect to the Mg enrichment, but the underlying mechanism has not been unravelled so far. To predict the long-term performance of a bentonite buffer, numerical modelling is required in order to be able to simulate the reactions of all accompanying mineral phases. Smectites, which dominate the bentonite composition, are therefore particularly difficult to characterise, as their dissolution is often observed to be non-stoichiometric. Various model approaches exist to simulate smectite reactions, mostly based on kinetic rate reactions, ideally considering the effect of pH (congruent or incongruent dissolution), temperature and the degree of saturation of the solution. Reassessing and improving the thermodynamic/kinetic data of smectites are prerequisites for improving long-term buffer performance assessment.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135981354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Photon shielding properties of alkali- and acid-treated Philippine natural zeolite 碱和酸处理菲律宾天然沸石的光子屏蔽性能

4区地球科学

Clay Minerals Pub Date : 2023-09-11 DOI: 10.1180/clm.2023.25

Mon Bryan Z. Gili

引用次数: 0

Adsorption of gold nanoparticles on illite under high solid-liquid ratio and initial pH conditions 高固液比和初始pH条件下金纳米颗粒在伊利石上的吸附

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-25 DOI: 10.1180/clm.2023.23

Ping Zeng, Xin Nie, Zonghua Qin, S. Luo, Yuhong Fu, W. Yu, Meizhi Yang, Wenqi Luo, Q. Wan

引用次数: 0

A novel magnetic sepiolite/Fe2O3 composite for adsorptive removal of lead(II) ions from aqueous solutions 一种新型磁性海泡石/Fe2O3复合材料吸附去除水中铅离子

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-25 DOI: 10.1180/clm.2023.24

Osman Uygun, Ayşenur Murat, Gaye Ö. Çakal

引用次数: 0

PROSPECTION AND CHARACTERIZATION OF PLASTIC CLAYS FROM THE STATE OF SÃO PAULO, BRAZIL, AS RAW MATERIAL FOR PORCELAIN STONEWARE TILE PRODUCTION 巴西sÃo保罗州可塑粘土作为陶瓷砖生产原料的勘探与表征

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-18 DOI: 10.1180/clm.2023.22

S. R. Christofoletti, José Francisco Marciano Motta, Eduardo Camargo Meneghel, F. G. Melchiades

引用次数: 0

Generalized relationships between the ionic radii of octahedral cations and the b crystallographic parameter of clay and related minerals 八面体阳离子的离子半径与粘土及相关矿物的b晶体学参数之间的广义关系

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-18 DOI: 10.1180/clm.2023.20

S. Petit, A. Decarreau, B. Grégoire, E. Ferrage

引用次数: 0

Adsorptive removal of stable and radioactive Pb(II) isotopes from aqueous solution using bentonite, zeolite and perlite: characterization, isotherm and thermodynamic studies 使用膨润土、沸石和珍珠岩从水溶液中吸附去除稳定和放射性Pb（II）同位素：表征、等温线和热力学研究

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-17 DOI: 10.1180/clm.2023.18

Osman Uygun, R. Güven, Gaye Ö. Çakal

{"title":"Adsorptive removal of stable and radioactive Pb(II) isotopes from aqueous solution using bentonite, zeolite and perlite: characterization, isotherm and thermodynamic studies","authors":"Osman Uygun, R. Güven, Gaye Ö. Çakal","doi":"10.1180/clm.2023.18","DOIUrl":"https://doi.org/10.1180/clm.2023.18","url":null,"abstract":"In this study, stable and radioactive lead removal from aqueous solution by adsorption using bentonite, zeolite and perlite minerals obtained from various locations in Türkiye was studied in batch experiments. The adsorbents were first characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and then the physicochemical properties were determined. The effects of various factors that influence adsorption, such as solution pH, adsorbent dosage, contact time, initial Pb2+ ion concentration, temperature and shaking rate, were studied. The adsorption of Pb2+ was modelled using the Langmuir, Freundlich and Dubinin–Radushkevich isotherms. The adsorption capacities of the minerals for Pb2+ followed the order: bentonite > zeolite > perlite, and the maximum adsorption capacities were 131.6, 36.1 and 21.5 mg g–1, respectively. The adsorption data fit well with the Langmuir isotherm. The bonding of lead ions on the adsorbents was confirmed by XRF and FTIR analyses after the adsorption process. The adsorption of Pb2+ ions on the adsorbents was spontaneous and endothermic. The adsorption process took place by cation exchange in addition to electrostatic interaction. Furthermore, radioactive 210Pb2+ adsorption on bentonite, zeolite and perlite was studied, with the analyte being analysed using a liquid scintillation counter. It was seen that in addition to Pb(II) ions, these minerals also adsorbed the radioactive decay products of 210Pb, which were 210Po and 210Bi. The removal percentages of 210Pb were 95%, 38% and 30% and those of 210Po were 75%, 60% and 74% for bentonite, zeolite and perlite, respectively.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42290099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Water-based drilling fluid with palygorskite: cutting carrying and contaminants 含坡缕石的水基钻井液:切割携带物和污染物

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-11 DOI: 10.1180/clm.2023.15

V. C. Santanna, Gabriela Carlos Nunes Araújo, Maria Thayse Andrade da Silva, T. N. C. Castro Dantas, Patrícia Mendonça Pimentel

{"title":"Water-based drilling fluid with palygorskite: cutting carrying and contaminants","authors":"V. C. Santanna, Gabriela Carlos Nunes Araújo, Maria Thayse Andrade da Silva, T. N. C. Castro Dantas, Patrícia Mendonça Pimentel","doi":"10.1180/clm.2023.15","DOIUrl":"https://doi.org/10.1180/clm.2023.15","url":null,"abstract":"\u0000 In the petroleum industry, one of the most important functions fluids must perform is to carry cuttings efficiently. In this context, the contamination of drilling fluids represents a challenge to the industry because it alters the properties of these fluids. This work compares two drilling fluids (one palygorskite-based and the other polymer-based), evaluating the effects of contaminants on these drilling fluids and their ability to carry cuttings. A contaminant is considered to be any material that causes undesirable changes in the properties of the drilling fluid. Contamination of an aqueous drilling fluid by calcium hydroxide (Ca(OH)2) and brine can increase the filtrate volume, decrease the perforation rate and alter the rheological properties of the fluid. This work analyses the effects of contamination by Ca(OH)2 and brine on the properties of salted water-based drilling fluids viscosified with palygorskite. For comparison, tests were performed with a polymeric drilling fluid. The cutting-carrying capacity of these fluids was verified using the empirical correlations of Moore (1974), Chien (1994) and Walker & Mayes (1975). The results show that the drilling fluid with palygorskite is resistant to contamination with Ca(OH)2 and brine, presenting low filtrate volume values. The drilling fluid with palygorskite presented greater slip velocities than the polymeric drilling fluid. Regarding the cutting-carrying capacity, the drilling fluid with palygorskite presented positive transport ratio values (>0), making it suitable for carrying rock cuttings. However, the polymeric drilling fluid showed better performance in terms of cutting-carrying capacity.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43998769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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