Clay Minerals最新文献_第2页

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

Clay mineralogical evidence of near-equatorial Palaeocene–Eocene Thermal Maximum in Barmer Basin, India 印度Barmer盆地近赤道古新世-始新世热盛期的粘土矿物学证据

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-09 DOI: 10.1180/clm.2023.19

Rohit Kumar, A. Hameed, P. Srivastava

{"title":"Clay mineralogical evidence of near-equatorial Palaeocene–Eocene Thermal Maximum in Barmer Basin, India","authors":"Rohit Kumar, A. Hameed, P. Srivastava","doi":"10.1180/clm.2023.19","DOIUrl":"https://doi.org/10.1180/clm.2023.19","url":null,"abstract":"\u0000 The Palaeocene–Eocene Thermal Maximum (PETM) was a global extreme climatic event, but it is relatively unknown from lower latitudes or equatorial regions in comparison to mid- and high latitudes. The present study provides the first clay mineralogical evidence of the PETM and subsequent hyperthermal events in a near-equatorial region represented by the Akli Formation in the Barmer Basin, India. The 32 m-thick succession of the Akli Formation shows abrupt changes in smectite and kaolin abundances preceding, during and succeeding the PETM event. Within the studied section, the kaolin content increases from 5–8% pre-PETM to 30–35% during the PETM, and then again decreases to 5–6% during the post-PETM period. The smectite, however, is marked by a corresponding decrease and its transformation into kaolin in acid weathering conditions. The transformation of the smectite is first marked by hydroxy interlayering and then transformation into kaolin during the PETM. The transformation of smectite into kaolin also resulted in extensive precipitation of iron oxide in sediments. The clay mineralogical changes in the Palaeocene–Eocene transition sediments of the Akli Formation were caused by 3–5°C warming and a 25–50% increase in rainfall during the hyperthermal events. Unusually high charcoal (~20%) fragments during the Palaeocene–Eocene transition also suggest warming and widespread biomass burning during the PETM in the lower latitudes.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45688586","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

Desorption behavior of polymer on sepiolite surfaces under high-temperature and high-salinity conditions 高温高盐度条件下海泡石表面聚合物的解吸行为

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-02 DOI: 10.1180/clm.2023.21

Lingwan Lin, Yukun Yang, X. Li, Guobin Jiang, P. Luo

引用次数: 0

Theoretical Analysis on Effect of Doping [Na(I), K(I), Mg(II), Ca(II), and Fe(II)] on the Electronic and Mechanical Properties of Pyrophyllite 掺杂[Na(I)， K(I)， Mg(II)， Ca(II)， Fe(II)]对叶叶石电子力学性能影响的理论分析

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2023-08-02 DOI: 10.1180/clm.2023.17

Jian Zhao, Yi-Fei Wang, Zhaofu Luan, Yu Cao, M. He

引用次数: 0