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The effect of pH on the sorption of gold nanoparticles on illite

Acta Geochimica 2020年第2期39卷 172-180页

作者： Yuhong Fu Quan Wan Zonghua Qin Xin Nie Wenbin Yu Shanshan Li School of Geographic and Environmental Sciences Guizhou Normal UniversityGuiyang 550025GuizhouChina State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081GuizhouChina CAS Center for Excellence in Comparative Planetology Hefei 230026AnhuiChina School of Chemistry and Materials Science Guizhou Normal UniversityGuiyang 550025.GuizhouChina

Sorption between nanoparticles(NPs)and minerals may critically affect the migration of associated elements as well as the environmental impact of *** illite is widely present in soil,sediment,and water,we have experimentally investigated the sorption behavior of citrate-coated gold nanoparticles(AuNPs)as model NPs on illite under different pH and mineral mass *** demonstrated that sorption of these negatively charged AuNPs strongly depended on the suspension *** pH above 8,which coincided with the apparent point of zero charge(pH 7.9)of our illite sample,only marginal sorption of AuNPs was *** pH 3-8,significant sorption of AuNPs on illite was found,with almost complete sorption occurring at more acidic conditions(pH 3-4).TEM observations revealed that sorption took place through the attachment AuNPs on illite *** pH 2,AuNPs mostly formed chain-like fused structures and precipitated out of the *** upon the above pH dependence,residual organic ligand content after sorption,and complementary sorption results with positively charged AuNPs,we conclude that the sorption process is mainly driven by the electrostatic attraction between negatively charged AuNPs and positively charged illite edges,with possible competitive involvement of citrate *** expect that our findings will improve our understanding of NP-mineral interaction and the environmental fate of NPs.

关键词： Gold nanoparticles illite Sorption Charge Electrostatic interaction

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Effects of Interface on the Dynamic Hysteresis Loss and Static Mechanical Properties of illite Filled SBR Composites

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Chinese Journal of Polymer Science 2022年第11期40卷 1493-1502页

作者： Zhe-Peng Wang Hao Zhang Qiang Liu Shao-Juan Wang Shou-Ke Yan Key Laboratory of Rubber-Plastics Ministry of EducationQingdao University of Science&TechnologyQingdao266042China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Despite growing interest in nano-sized fillers,micro-sized fillers with desired compatibility are still used for reinforcing rubbers,owing to their lower production cost and easier processing relative to nano-sized ***,the abundant and eco-friendly clay minerals are recognized as the materials of the twenty-first ***,illite,a naturally occurring clay having dimension in micrometric scale,has been selected as filler to reinforce the *** improve the compatibility of illite with SBR,the illite was modified by either bis[3-(triethoxysilyl)propyl]tetrasulfide(Si69-illite)or 3-mercaptopropyltriethoxysilane(KH580-illite).The interfacial interactions of SBR composites filled with pristine illite(illite/SBR)and Si69-illite(Si69-illite/SBR),or KH580-illite(KH580-illite/SBR)were characterized by bound rubber content and Payne effect measurements,while dynamic hysteresis losses of these uncured and cured composites were also analyzed under various strain *** was found that the filler-rubber interactions were greatly improved for Si69-illite/SBR and KH580-illite/SBR systems compared to the illite/SBR *** leads to an increment of modulus at 300%strain of the composites from 3.46 MPa for illite/SBR to 7.70 MPa for Si69-illite/SBR and12.96 MPa for KH580-illite/***,lower rolling resistance and better wear resistance without compromising wet traction of Si69-illite/SBR and KH580-illite/SBR have been *** demonstrates the high possibility of Si69 and KH580 modified illites as promising alternative fillers for reinforcing rubbers.

关键词： illite SBR Composite Dynamic hysteresis loss Static mechanical properties

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Ore-forming fluid constraints on illite crystallinity(IC)at Dexing porphyry copper deposit,Jiangxi Province

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Science China Earth Sciences 2001年第2期44卷 177-184页

作者：金章东朱金初季峻峰卢新卫李福春 State Key Laboratory for Research of Mineral Deposits Nanjing UniversityNanjing 210093China Lake Sediment and Environment Laboratory Nanjing Institute of Geogra phy&LimnologyChinese Academy of SciencesNanjing 210008China

illite, a distinctive kind of clay minerals of potassiumalteration within the hydrothermal alteration zone, frequently occurs at the Tongchang porphyry copper deposit ore field. The illite crystallinity (IC) value and expandability are mainly affected by water/rock ratio or fluid flux. It was formed by illitization of plagioclase and micas during hydrothermal fluid-rock interaction within the porphyry body and near the contact zone with wall rocks. Moreover, the negative correlation between illite index (IC) and copper grade indicates that within the alteration zone, the smaller the illite crystallinity value, the higher the alteration degree, and the higher the copper grade due to higher water/rock ratio. At lower levels of the porphyry body, however, the illite crystallinity (IC) values are mainly controlled by temperature and time duration.

关键词： illite kübler index ore-forming fluid porphyry copper deposit

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Experiment of the ^(40)Ar/^(39)Ar dating of diagenetic illite in gas reservoirs

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Chinese Science Bulletin 2004年第S1期49卷 89-93页

作者： WANG Longzhang, DAI Tongmo & PENG Ping’an State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640, China Faculty of Resources, Chinese University of Geosciences, Wuhan 430074, China Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Organ Geochem Guangzhou 510640 Peoples R China China Univ Geosci Fac Resources Wuhan 430074 Peoples R China

40Ar/39Ar dating of diagenetic illite has been performed to investigate gas reservoirs in the Sulige Gas Field of the northern Ordos Basin. A series of technical challenges were confronted, including illite purification, Ar recoil loss, and separation of diagenetic illite from detrital illite. Mineral growth ages for diagenetic illite were obtained by this experiment, from which the age of gas emplacement was deduced to be later than 169 Ma.

关键词： 40Ar/39Ar dating diagenetic illite purification of clay minerals Ar recoil loss time of gas emplacement.

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Alkylammonium cations treating and K-Ar dating of illite from mudstones

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Chinese Science Bulletin 2002年第19期47卷 1669-1672页

作者： YANG Zhongfang JI Junfeng CHE Chen ZHOU Fengying China University of Geosciences Beijing 100083China State Key Laboratory of Mineral Deposit Research Institute of Surfacial GeochemistryDepartment of Earth SciencesNanjing UniversityNanjing 210093China Deposit Institute of Chinese Academy of Geological Sciences Beijing 100037China

Two kinds of mudstones from the Tarim Basin and the Tuna Basin were treated with C8 and C18 alkylammonium cations. Both of them were dated by the K-Ar method. One kind of rock contains mainly diagenetic illite, and the other contains mixed layer illite/smectite (I/S). Sample separation and alkylamnionium cations treatment were performed first, and K-Ar dating followed. The result shows that fine-grained minerals have younger K-Ar ages and coarse-grained components have older ages. Plots of K-Ar age versus K2O (%) are linear, the range of diagenetic age can be estimated by extrapolation. The reaction results of the above samples are different after alkylamnionium cations treatments. The samples containing mainly illite show a decrease in K2O and an increase in age by 1-25 Ma, suggesting that preferential exchange of young diagenetic clay rather than detrital clay by alkylamnionium cations, therefore the age of diagenetic illite can be calculated directly by the % K2O and radiogenic 40Ar removed. For the

关键词： alkylammonium cations illite K/Ar date mudstone.

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Kinetic model for the smectite to illite transformation in active geothermal systems

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Chinese Science Bulletin 1998年第12期43卷 1042-1044页

作者： Ji Junfeng P. R. L. Browne Liu Yingjun Wang Henian Nanjing Univ Dept Earth Sci Nanjing 210093 Peoples R China Univ Auckland Geothermal Inst Auckland 1 New Zealand Univ Auckland Dept Geol Auckland 1 New Zealand

The smectite to illite transformation in active geothermal systems of New Zealand can be simulated by a first_order reaction kinetic model, which provides direct estimates about the minumum ages of active geothermal systems themselves. The derived kinetic values show that the smectite to illite transformation is sensitive to both temperature and time.

关键词： illite smectite kinetic model active geothermal system.

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THE ELECTRON MICROSCOPY STUDY ON THE MIXED LAYER OF illite AND CHLORITE

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Chinese Science Bulletin 1992年第24期37卷 2067-2070页

作者：张立飞王启明 Department of Geology Peking University Beijing 100871 PRC Electron Microscope Lab. Peking University Beijing 100871 PRC

Clay minerals having the same type of octahedral layer commonly occur as mixed layers. With the application of electron microscopy in day mineralogy, it is recognized that clay minerals which have different octahedral sheets can also form mixed layers, such as the mixed layer of illite and chlorite which has been well studied. However, there are different opinions on its origin. Based on the study of transmission electron microscopy (TEM)

关键词： mixed layer illite and chlorite electron microscopy

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The Effection of Authigenic illite on Relatively High-quality Tight Sandstones Reservoirs

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Acta Geologica Sinica(English Edition) 2015年第A01期89卷 427-430页

作者： YAN Ming Northeast Petroleum University

1 Introduction The relatively high-quality tight sandstones reservoirs is the emphasis of oil exploration phase. Generally dense cases with high pore throat may gather a lot of oil. The quality of high-quality reservoirs is not only determined by the rock size, sedimentary environment and so on, clay minerals also affects the distribution of high quality reservoirs in great degree.

关键词： illite CLAY minerals SANDSTONE PETROLEUM reservoirs PETROLEUM prospecting PETROLEUM geology

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Origin of illites in the Luochuan loess section——Evidence from TEM study

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Chinese Science Bulletin 1999年第4期44卷 372-375页

作者： Junfeng Ji Jun Chen Huayue Lu Nanjing Univ Dept Earth Sci State Key Lab Mineral Deposit Res Nanjing 210093 Peoples R China Chinese Acad Sci Xian Lab Loess & Quaternary Geol Xian 710061 Peoples R China

Morphology and composition of illite from the Luochuan loess section were investigated by TEM. The results show that most of the illite grains are characterized by rounded shapes and chemical compositions are closely similar to those of anchizonal illites. The enrichment of illites in paleosol over loess was mainly caused by the weak winter monsoon during the interglacial periods, and was not related to the in situ pedogenesis. illite can serve as an indicator for tracing eolian dust from Loess Plateau in pelagic and lacustrine sediments.

关键词： loess illite origin.

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Silurian-Devonian and Jurassic Thermal Events in the Ordos Basin, China: Indications from K-Ar Dating on illites

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Acta Geologica Sinica(English Edition) 1996年第4期70卷 435-446页

作者： Hans Ahrendt Klaus Wemmer Hans-J rgen Behr Institute of Geology and Dynamics of Lithosphere University of Gttingen G ttingen GermanyInstitute of Geology and Dynamics of LithosphereUniversity of Gttingen G ttingen GermanyInstitute of Geology and Dynamics of LithosphereUniversity of Gttingen G ttingen Germany

In the Ordos basin, two distinct thermal events of different ages have been identified for the first time by means of K-Ar dating combined with illite crystallinity analysis. For the Late Triassic and Late Permian samples, the K-Ar ages of the illites. The K-Ar ages of both < 0.2μm and < 2μm fractions of a Middle Cambrian sample (368 Ma and 419 Ma) correspond to the ages of the metamorphism and earliest granite intrusion in the northern Caledonian Qinling fold zone (380-420 Ma) and show a thermal event during Silurian-Devonian time.

关键词： illite K-Ar dating illite crystallinity thermal event Ordos basin

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