Clay Minerals最新文献_第9页

Provenance analysis of sediments in the south-east Aegean during the Upper Quaternary: a composite approach based on bulk and clay mineralogy and geochemistry 爱琴海东南部上第四纪沉积物物源分析:基于大块、粘土矿物学和地球化学的复合方法

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-09-01 DOI: 10.1180/clm.2022.2

Georgia Leontopoulou, G. Christidis, G. Rousakis, Noémi S. Müller, G. Papatheodorou, M. Geraga

{"title":"Provenance analysis of sediments in the south-east Aegean during the Upper Quaternary: a composite approach based on bulk and clay mineralogy and geochemistry","authors":"Georgia Leontopoulou, G. Christidis, G. Rousakis, Noémi S. Müller, G. Papatheodorou, M. Geraga","doi":"10.1180/clm.2022.2","DOIUrl":"https://doi.org/10.1180/clm.2022.2","url":null,"abstract":"Abstract Sediments from the ST5 deep-sea bottom core collected from the south-east Aegean Sea between Symi and Tilos islands, Greece, were examined by quantitative mineralogical analysis and geochemical analysis to infer provenance and palaeoenvironmental control over sediment deposition. The mineralogical composition comprises carbonates (mainly calcite and Mg-calcite), quartz, feldspars, serpentine, amphibole and clay minerals. Chlorite is the most abundant clay mineral, whereas smectite and illite are less abundant than in the sediments in the south-west Aegean and the Cretan Sea. Semi-quantitative analysis of clay minerals from oriented clay fractions overestimates significantly the smectite content and underestimates the abundances of illite, chlorite and kaolinite. The studied sediments are enriched in MgO, Ni and Cr, which decrease in abundance with decreasing depth, following the distribution of serpentine. By contrast, the abundances of SiO2, Al2O3, Fe2O3, Na2O and K2O increase upcore. The regional S1 sapropel horizon is enriched in V and Co and has considerably greater Ba/Al ratios than the remaining sequence. The mineralogical and geochemical relationships indicate a strong ultrabasic influence, probably from the Marmaris ophiolite in the Lycian nappes. The clay mineral distribution suggests that the smectite was mainly of volcanogenic origin, the illite was supplied by the nearby landmasses of west Anatolia and the islands of Rhodes, Tilos and Symi and the contribution from the south-east Mediterranean was limited or totally lacking. The combined use of the mineralogical and geochemical analysis of bulk sediments rather than the clay fractions is not only extremely useful in tracing sediment provenance in relatively closed basins, but it also enables a more realistic assessment of the importance of water circulation patterns on sedimentation processes in such environments.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"56 1","pages":"229 - 249"},"PeriodicalIF":1.5,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45274478","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

Influence of acid activation on the NH3-adsorption properties of a Turkish bentonite 酸活化对土耳其膨润土nh3吸附性能的影响

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-09-01 DOI: 10.1180/clm.2021.31

Burcu Erdoğan, Orkun Ergürhan, A. Anter

引用次数: 1

CLM volume 56 issue 3 Cover and Back matter CLM第56卷第3期封面和封底

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-09-01 DOI: 10.1180/clm.2022.5

引用次数: 0

Sepiolite as an efficient adsorbent for ethylene gas 海泡石是一种高效的乙烯气体吸附剂

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-09-01 DOI: 10.1180/clm.2021.36

Burcu Erdoğan, F. Esenli

引用次数: 2

CLM volume 56 issue 2 Cover and Front matter CLM第56卷第2期封面和封面问题

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.33

引用次数: 0

Optimization of bleaching power by sulfuric acid activation of bentonite 硫酸活化膨润土漂白性能的优化

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.28

H. Bayram, G. Ustunisik, M. Önal, Y. Sarikaya

{"title":"Optimization of bleaching power by sulfuric acid activation of bentonite","authors":"H. Bayram, G. Ustunisik, M. Önal, Y. Sarikaya","doi":"10.1180/clm.2021.28","DOIUrl":"https://doi.org/10.1180/clm.2021.28","url":null,"abstract":"Abstract Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H2SO4) and distilled water, yielding various bleaching earths (BEs). The roles of each of the process variables, namely mass fraction of H2SO4 (x) in the dried CaB and pure H2SO4 mixture, heating temperature (T) and contact time (t), in the activation were tested. The raw CaB and each BE were examined with X-ray diffraction, chemical analyses, N2 adsorption/desorption, pH-metry and tintometry. The BE contents in both the aqueous and oily suspensions were set to 2% by mass in order to measure the pH value and the bleaching power, respectively. The optimum conditions for the activation to obtain a BE having the same bleaching power (0.60) as Tonsil® Optimum Bleaching Earth for soybean oil were determined as x = 0.35, T = 100°C and t = 2 h. The bleaching power increased only marginally upon increasing the activation time from 2 h up to 10 h at a given x and T. After 10 h, significant changes did not take place in the bleaching power of the BE. The mass fraction of total structural metal oxide (y), pH value, specific pore volume (V), specific surface area (S) and mean internal diameter (D) of the mesopores for the optimized BE are y = 0.10, pH = 3.0, V = 0.31 cm3 g–1, S = 225 m2 g–1 and D = 7 nm. The pH and D values were more important for bleaching the alkaline refined soybean oil compared to the other parameters tested.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"56 1","pages":"148 - 155"},"PeriodicalIF":1.5,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44845419","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: 2

In situ synthesis of zeolites by geopolymerization with NaOH/KOH mixed solution and their potential application for Cd(II) immobilization in paddy soil NaOH/KOH混合溶液原位聚合合成沸石及其在水稻土中固定化Cd(II)的应用前景

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.29

Di Wu, Yi Huang, Guqing Xiao, Xuan Li, Xia Yao, Zixuan Deng, Rui Tan

引用次数: 1

Preparation and characterization of quaternary ammonium salt and 3-aminopropyltriethoxysilane-modified sericite mica 季铵盐及3-氨基丙基三乙氧基硅烷改性绢云母的制备与表征

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.22

Chunguang Xiao, Fengrao Lang, Y. Xiang, Yi Lin, Du-xin Li

{"title":"Preparation and characterization of quaternary ammonium salt and 3-aminopropyltriethoxysilane-modified sericite mica","authors":"Chunguang Xiao, Fengrao Lang, Y. Xiang, Yi Lin, Du-xin Li","doi":"10.1180/clm.2021.22","DOIUrl":"https://doi.org/10.1180/clm.2021.22","url":null,"abstract":"Abstract Modified sericite mica was prepared by combining the intercalation of cetyltrimethylammonium bromide (CTAB) through ion exchange and surface modification of 3-aminopropyltriethoxysilane (KH550) with the following steps: high-temperature activation of sericite mica, acid activation, sodium modification, LiNO3 treatment, the ion-exchange intercalation of the cetyltrimethylammonium cation (CTA+) and surface modification of KH550. High-temperature activation was the most critical step for the modified sericite mica, and the number of hydroxyl groups of mica under high temperature directly affected the surface modification of KH550. The effects of various activation temperatures on the surface modification of sericite mica were investigated. The structure of activated sericite mica was intact when activation temperature was 600°C or 700°C, and the surface modification of sericite mica was not affected. The structure of activated sericite mica was partially destroyed at 800°C. The optimal temperature for activating sericite mica was 700°C. The structure and morphology of modified sericite mica were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer–Emmett–Teller (BET) analysis and loose bulk volume. The KH550 could not only chemically graft onto the surface of sericite mica, but also enter into the interlayer through electrostatic attraction after its end amino group was protonated. The interlayer spacing of modified sericite mica increased to 3.22 nm, indicating that it might be an excellent layered silicate for preparing clay–polymer nanocomposites.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"56 1","pages":"87 - 98"},"PeriodicalIF":1.5,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48412521","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: 2

Analysis of the chemical composition and phase structure of ‘Ru-type ware’ bodies under the influence of firing temperature 烧成温度对“如”体化学成分和相结构影响的分析

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.24

Bo Wu, Weijuan Zhao

{"title":"Analysis of the chemical composition and phase structure of ‘Ru-type ware’ bodies under the influence of firing temperature","authors":"Bo Wu, Weijuan Zhao","doi":"10.1180/clm.2021.24","DOIUrl":"https://doi.org/10.1180/clm.2021.24","url":null,"abstract":"Abstract The Qingliang Temple kiln located in Baofeng County, Henan Province, China, is the discovery site of Ru Kuan porcelain, which is one of the five famous porcelain types of the Song dynasty in China. The ‘Ru-type ware’ and unglazed firing bodies were unearthed from the Qingliang Temple kiln in 2014, and the excavation site was very close to the central firing area of Ru Kuan porcelain. In this paper, the chemical composition, firing temperature and phase structure of the Ru-type ware and unglazed firing bodies from the Qingliang Temple kiln were analysed systematically using energy-dispersive X-ray fluorescence spectrometry, high-temperature thermal expansion and X-ray diffraction. The raw-material sources of the Ru-type ware bodies with various glaze colours are consistent but differ significantly from those of the unglazed firing bodies. The firing temperatures of the Ru-type ware and unglazed firing bodies are 1150–1200°C and 950°C, respectively, which are considered underfired. Mullite, α-quartz, β-cristobalite and α-Fe2O3 are the main constituents of the Ru-type ware bodies, whereas α-quartz and anatase were identified in the unglazed firing bodies. The Ru-type ware is related to the Ru Kuan ware in terms of firing techniques and official use.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"26 26","pages":"108 - 116"},"PeriodicalIF":1.5,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41307043","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

Adsorption of cetyltrimethyl ammonium bromide surfactant for organophilization of palygorskite clay 十六烷基三甲基溴化铵表面活性剂对坡缕石粘土的吸附

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2021-06-01 DOI: 10.1180/clm.2021.27

R. P. Silva, Alisson G B Góis, Michele O. Ramme, T. N. C. Castro Dantas, J. L. Barillas, V. C. Santanna

引用次数: 4