|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Pyrite Surface after ThiobaciUusferrooxidans Leaching at 30℃显示文摘In order to investigate the effect of Thiobacillus ferrooxidans on the oxidation of pyrite, two parallel experiments, which employed H2SO4 solutions and acidic solutions inoculated with Thiobacillus ferrooxidans, were designed and carried out at 30℃. The initial pH of the two solutions was adjusted to 2.5 by dropwise addition of concentrated sulphuric acid. The surfaces of pyrite before exposure to leaching solutions and after exposure to the H2SO4 solutions and acidic solutions inoculated with Thiobacillus ferrooxidans were observed by scanning electron microscopy (SEM). There were a variety of erosion patterns by Thiobacillus ferrooxidans on the bio-leached pyrite surfaces. A conclusion can be drawn that the oxidation of pyrite might have been caused by erosion of the surfaces. Attachment of the bacteria to pyrite surfaces resulted in erosion pits, leading to the oxidation of pyrite. It is possible that the direct mechanism plays the most important role in the oxidation of pyrite. The changes in iron ion concentrations of both the experimental solutions with time suggest that Thiobacillus ferrooxidans can enhance greatly the oxidation of pyrite. | LU Jianjun LU Xiancai WANG Rucheng LI Juan ZHU Changjian GAO Jianfeng | 2006 | Acta Geologica Sinica(English Edition)2006，80，3： | 16 |
| 2 | A comparative study of natural and experimental nano-sized grinding grain textures in rocks显示文摘In three shallow-level fault systems in eastern China, nano-sized (30―100 nm) grinding grain textures are found in the thin-shelled rheological layer representing frictional-viscous high strain field. The surface layer near slipping plane is composed of stacks of grinding grains with high sphericity and uniform nano-sized diameter, while the underlying layer appears as a mixture of irregular ones with diverse diameters. Rock deformation experiments indicate that the grinding grain texture is a common phenomenon in shearing fractures, suggesting a potential transition from sliding friction to rolling one during the rock deformation process. This transition is crucial for many tribological processes in geo- logical fields. | SUN Yan SHU LiangShu LU XianCai LIU Hao ZHANG XiHui K. KOSAKA LIN AiMing | 2008 | Chinese Science Bulletin2008，53，8： | 13 |
| 3 | Anorthite dissolution promoted by bacterial adhesion:Direct evidence from dialytic experiment显示文摘Bacterial adhesion is crucial to the dissolution of minerals and rocks.By employing dialysis method,we designed comparative experiments to investigate the dissolution behavior of anorthite with the mediation of both adhered and non-adhered Paenibacillus polymyxa.The results show that during 10 experimental days,the dissolution of anorthite was promoted considerably by P.polymyxa and metabolites.Nanoscale precipitates were formed in contact experiment.Anorthite has a higher release of Ca and lower releases of Al and Si in dialysis experiment than in contact experiment.The difference implies that the release of Ca is controlled by mechanism of proton-exchange,whereas those of Al and Si are controlled by ligand-complexation in which Al-O-Si bonds are destroyed first.Kinetically the release of Ca is controlled mainly by surface reaction and leached-layer diffusion.Both of them are restrained by adhered bacteria.The releases of Al and Si are controlled mainly by surface reaction,which is accelerated by adhered bacteria. | ZHOU YueFei WANG RuCheng LU XianCai | 2011 | Science China Earth Sciences2011，54，2： | 9 |
| 4 | Recent progress in studies layer in rock on the nano-sized particle shear planes显示文摘Since the 1990s, an ultramicro-particle texture in nano- or micron-sized scale has been continually found in shear planes of various rocks, and recently further progress was made in generic physical mechanisms. In this article, the characteristics of the nano-sized particle layer in rock shear planes (including widespread distribution, layering texture, non-linear genetic mechanism, and multiple functions) on an ultra micro-scale were briefly introduced and more information was obtained by analyzing cases from home and abroad. Our findings suggest that (1) there is a paragenetic relationship between the development of shear frictional- viscous and the formation of nano-sized particles, and (2) in the shear movement, partitioning, segregating, and layering in rocks are initiated by the sliding motion of the nano-sized particle layer. Moreover, the plastic rheology of rocks is essentially the move- ment of ultra-micro-sized particles (nano-size and micro-size), and the nano-sized particle layer in rock shear planes is characterized by some particular physical and chemical effects. | Yan Sun Liangshu Shu Xiancai Lu Hao Liu Xihui Zhang Aiming Lin Kazuo Kosaka | 2008 | Progress in Natural Science:Materials International2008，18，4： | 7 |
| 5 | Discovery of low-mature hydrocarbon in manganese nodules and ooze from the Central Pacific deep sea floor显示文摘Extracts from manganese nodules and ooze from the Central Pacific deep sea floor were analyzed using the chromatogram-mass spectrum, and it was found that most of the biomarker molecules are of the low-mature type (some have characteristics of mature): the ratio of 'A'/C is high between 11.4%-19.75%; CPI is 1.22-1.23; C31-22S/ (22S+22R) hopane is 0.59-0.60, Tm/Ts is 0.99-1.99; pa moretane/(αβ+βα) hopane is 0.12-0.14; C29 sterane 20S/(20S+20R) is 0.35-0.41; ββ/(ββ+αα) is 0.38-0.45; arene TA(I)/TA(I+Ⅱ) is 0.16-0.21; methyl-phenanthrene index (MPI1) is 0.35-0.67. According to the geological settings of the sampling area and its organic geochemical characteristics, it is considered that the hydrothermal activities on the ocean floor facilitate the decomposition of organic matter in the sediment, which leads to the generation and migration of hydrocarbon into manganese nodules and ooze. This discovery is important for understanding the mechanisms of hydrocarbon generation in the ocean floor and | HU Wenxuan JIN Zhijun YAO Suping LU Xiancai CHEN Zhilin ZHANG Linye ZHANG Xuejun ZHOU Huaiyang | 2002 | Chinese Science Bulletin2002，47，11： | 7 |
| 6 | Mineralogical Characteristics of Unusual Black Talc Ores in Guangfeng County, Jiangxi Province, China显示文摘Talc is a hydroxyled, magnesium-rich, layered silicate that has the ideal chemical formula Mg3Si4O10(OH)2. Due to its unique properties, such as softness, chemical inertness, high thermal stability, low electrical conductivity, lamellar habit, adsorption properties, and occurrence of a wide range of particle sizes that can be easily reduced by milling and high specific surface area, talc is widely used in many industries. A stratified deposit of unusual black talc, an occurrence of talc estimated to be more than half a billion tons, was found exposed in the late Neoproterozoic Dengying Formation, located in Guangfeng County, Jiangxi Province, southeastern China. The ores occur primarily as oolitic structures (Fig. 1). The mineralogical and geochemical characteristics of the ores were investigated by using multiple techniques. The ores were found to mainly consist of talc (30%–70%), dolomite, quartz, and magnesite. Most of talc crystals are ultrafine (with an average crystallite size of smaller than 5 μm) and appear as irregular broken or distorted lamellar flakes. The total organic carbon (TOC) content of the black talc ore samples is generally lower than 1.0%. Electron-microprobe analysis (EPMA) revealed low contents of Na, K, Ca and Mn, Fe, Ni, Al in the talc oolitic particles. The talc ores have low contents of toxic elements and relatively high contents of Li and Zn. The infrared spectrum of the black talc is similar to that of white talc from Trimouns (Pyrenees, France), and their Brunauer–Emmett-Teller (BET) specific surface areas, ranging from 15.7 to 23.2 m2/g, is much higher than those of white talc (normally lower than 5.0 m2/g), which may be due to the small size of the talc crystals. | WANG Rucheng LI Chengxiang LU Xiancai ZHANG Ming | 2013 | 矿物学报2013，33，S1： | 6 |
| 7 | Nano-texture of penetrative foliation in metamorphic rocks显示文摘By observing four samples obtained from Jiangxi Province, China, under the scanning electron mi-croscope (SEM), we discovered that nano-particle layers were commonly formed on sliding planes of the penetrative foliation in metamorphic rocks. We also successfully reproduced this phenomenon with a tri-axial pressure experiment. Having gone through the granulitization-alienation-partition in the shear sliding process, the nano-particles (40-95 nm in diameter) display different individual shapes and dis-tinct layered textures. This nano-confinement layer is essentially a frictional-viscous stripe with vis-cous-elastic deformation. In the micro-domain stripe, activities in structural stress field-rheological physical field-geochemical field are very dynamic, corresponding to the three stages (i.e., shear sliding strengthening-weakening-exfoliating) of the foliation development in metamorphism rocks. As such, the viscous-elastic deformation behavior helps shed light on the understanding of the micro-dynamic mechanism of the structural shearing. | SUN Yan LU XianCai ZHANG XiHui LIU Hao LIN AiMing | 2008 | Science China Earth Sciences2008，51，12： | 5 |
| 8 | Boiling process of low temperature formation water in petroleum system, Qaidam Basin显示文摘FOLLOWING the study of Roedder et al., boiling fluid inclusions are identified in oil reservoir ofQaidam Basin. This paper reports the general characteristics of the boiling fluid inclusions, analyzes theconditions for the formation water to boil at low temperature, and discusses the relation between the boiling process and the oil/gas accumulation. 1 General features Boiling fluid inclusions are minute records of the immiscibility process of subterranean hydrothermalfluids, which are generally composed of different types trapped simultaneously. They are observed mostlyin magmatic hydrothermal mineral deposits. In sedimentary basins, the boiling process was only found inMVT. The discovery of boiling fluid inclusions in Qaidam Basin is of great significance to | HU Wenxuan~1, JIN Zhijun~2, QIU Nansheng~2, FU Qi~1, LU Xiancai~1 and SUN Rui~1 1. State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093, China 2. Basin and Reservoir Reseach Center, University of Petroleum, Beijing 102200, China | 1999 | Chinese Science Bulletin1999，44，S2： | 5 |
| 9 | Molecular simulation study on K^+-Cl^- ion pair in geological fluids显示文摘This paper reports a classical molecular dynamics study of the potential of mean forces(PMFs),association constants,microstructures K^+-Cl^- ion pair in supercritical fluids.The constrained MD method is used to derive the PMFs of K^+-Cl^- ion pair from 673 to 1273 K in low-density water(0.10-0.60 g/cm).The PMF results show that the contact ion-pair(CIP) state is the one most energetically favored for a K^+-Cl^- ion pair.The association constants of the K^+-Cl^- ion pair are calculated from the PMFs,indicating that the K^+-Cl^- ion pair is thermodynamically stable.It gets more stable as T increases or water density decreases.The microstructures of the K^+-Cl^- ion pair in the CIP and solvent-shared ion-pair states are characterized in detail.Moreover,we explore the structures and stabilities of the KCl-Au(I)/Cu(I) complexes by using quantum mechanical calculations.The results reveal that these complexes can remain stable for T up to1273 K,which indicates that KCl may act as a ligand complexing ore-forming metals in hydrothermal fluids. | Mengjia He Xiandong Liu Xiancai Lu Rucheng Wang | 2017 | Acta Geochimica2017，36，1： | 2 |
| 10 | Material Properties of Marine Hydrogenous Ferromanganese Crust and Its Performance in Desulfurization显示文摘海洋的氢的铁锰合金外壳,一个重要金属资源以后,作为自然 nano-structuredmaterial 的一种类型在各种各样的应用有重要潜力。由采用扫描电子显微镜学,氮吸附解吸附作用等温线测量, X 光检查荧光分光计和 X 光检查衍射方法,微观结构,表面性质和几个像板的铁锰合金外壳的化学成分从西北的太平洋取样了包括地被调查。尽管明显的差别从不同的层被观察,外壳是有高比面积区域,唯一的毛孔结构和丰富的过渡元素的典型多孔的材料。而且,在 desulfurization 过程的自然外壳的性能 preliminarily 在实验室实验被测试。外壳的 Thesulfur 能力分别地在房间温度和 350 deg C 是 13.1% 和 18.1% 。外壳能一个金属资源被用作不仅,而且作为环境材料。 | LU Xiancai HOU Qingfeng LIU Xiandong YANG Kan WANG Rucheng LING Hongfei XU Shijin | 2006 | Acta Geologica Sinica(English Edition)2006，80，3： | 2 |
| 11 | Study on the controllable synthesis of SH-MCM-41 mesoporous materials and their adsorption properties of the La3+, Gd3+and Yb3+显示文摘Sulfhydryl MCM-41(SH-MCM-41) mesoporous materials were prepared via a hydrothermal method,and-SH was successfully imported by a post-grafting method.The structure and surface properties of the materials were characterized using Fourier Transform infrared spectroscopy,X-ray diffraction and Transmission Electron Microscopy analysis.The low concentrations of La^3+,Gd^3+ and Yb^3+ adsorption on the material were investigated.This paper discusses the effects of system factors,such as pH and the solid-liquid ratio,on the performance of the adsorption process.The adsorption thermodynamics and kinetics were also explored.Experimental results indicated that the materials were in good order and had high specific surface area(956 m^2/g) with an average pore diameter of 2.1 nm;the mercapto groups were successfully grafted onto a molecular sieve,and the best grafted amount was 1.46×10^-3 mol/g.The materials showed preferable adsorption of La^3+,Gd^3+ and Yb^3+ with maximum adsorption capacities of560.56 mg/g,467.60 mg/g and 540.68 mg/g,respectively.The adsorption process can be described by the Freundlich isotherm model,and the adsorption data fits pseudo-second-order kinetics.After repeating the elution-regeneration cycle four times,the adsorption capacity of rare earth ions was mostly maintained,indicating that the adsorbent can be regenerated well and recycled to save costs.It has potential in practical application. | Xiancai Li Tianren Lu Ying Wang Yifeng Yang | 2019 | Chinese Chemical Letters2019，30，12： | 2 |
| 12 | The surface fractal investigation on the carbon nanotubes modified by the adsorption of PAA显示文摘 | Hou Qingfeng Lu Xiancai Liu Xiandong Hu Baixing Shen Jian | 2005 | Surface and Coating Technology2005，190，23： | 1 |
| 13 | Preparation and properties of GO-based lanthanum ion-imprinted polymer,La-IIP-MAA/Fe_(3)O_(4)-GO显示文摘In this article,ion-imprinting technology was used to prepare the lanthanum ion-imprinted polymer,LaIIP-MAA/Fe_(3)O_(4)-GO with magnetic graphene oxide as a carrier and methacrylic acid as a functional monomer.A series of characterizations were performed on the imprinted materials,the adsorptive and selective properties of the imprinted materials for lanthanum ions were explored,and the adsorption process was analyzed with respect to kinetics and thermodynamics.Finally,the reusability of the imprinted materials was studied.The results show that La-IIP-MAA/Fe_(3)O_(4)-GO has good adsorption effects for lanthanum ions,and adsorption equilibrium can be attained in about 20 min.When pH is 6 and the temperature is 35℃,the adsorption capacity reaches 110.98 mg/g.The adsorption process of lanthanum ions is pretty much in line with the quasi-second-order kinetic model and Freundlich isotherm adsorption model.La-IIP-MAA/Fe_(3)O_(4)-GO has good selectivity to lanthanum ions and maintains good effects after repeated use five times. | Minxin Shi Tianren Lu Xiancai Li Yifeng Yang | 2022 | Journal of Rare Earths2022，40，1： | 1 |
| 14 | Quantitative X-ray photoeleetron spectroscopy-based depth profiling of bioleached arsenopyrite surface by Acidithiobacillus ferro- oxidans显示文摘 | ZHU Tingting LU Xiancai LIU Huan | 2014 | Geochimica Et Cosmochimica Acta2014，127，4： | 1 |
| 15 | Variation in surface fractal of graphite after the adsorption of Tween80显示文摘 | Hou Qingfeng Lu Xiancai Liu Xiandong | 2005 | Applied Surface Science2005，240，14： | 1 |
| 16 | Bioleaching of chalcopyrite by Acidithiobacillus ferrooxidans显示文摘 | XingQing Zhao RuCheng Wang XianCai Lu JianJun Lu ChengXiang Li Juan Li | 2013 | Minerals Engineering2013，，： | 1 |
| 17 | Thermodynamic properties of calcium ferrite-type MgAl_2O_4:A first principles study显示文摘The diamond anvil cell experiments have revealed that the calcium ferrite(CF)-type aluminous phase is probably an important component of subducted mid-oceanic ridge basalt(MORB) in the lower mantle. In this study, we have performed first principles lattice dynamics calculations for the Mg Al_2O_4 end-member of the aluminous phase based on density functional perturbation theory using two functionals within the local density approximation(LDA) and generalized gradient approximation(GGA) for bracketing the calculated properties at their lower and upper limits, respectively. A simple empirical pressure correction at zero temperature has been applied to both LDA and GGA. The results of room-temperature equation of state(EOS) and zero-pressure thermal expansion calculated by GGA with pressure correction have shown the best agreement with available experimental data. The high-pressure and temperature thermodynamic properties have been obtained using the GGA with correction method. The pressure-volume relations are fitted with a third-order high-temperature Birch-Murnaghan EOS. The isobaric heat capacity, the coefficient of thermal expansion and isothermal bulk modulus are fitted with polynomials and their coefficients are reported in the range of 0–40 GPa and 300–2000 K. The density profile of MORB estimated using the computational thermo-elastic constants supports the hypothesis that the subducted oceanic slabs could gain enough downwelling forces into the lower mantle. | YIN Kun ZHOU HuiQun LU XianCai | 2016 | Science China Earth Sciences2016，59，4： | 1 |
| 18 | A molecular dynamics study of uranyl-carbonate complexes adsorbed on basal surfaces of clay minerals显示文摘We use molecular dynamics simulation to study the mechanisms involved in the adsorption of aqueous uranyl species(UO_2^(2+)) to the basal surfaces of clay minerals,including kaolinite,pyrophyllite and montmorillonite.Uranyl ion can form various complexes with carbonates,namely,[UO_2(H_2O)_5]^(2+),[UO_2(H_2O)3(CO_3)],[UO_2(H_2O)2(CO_3)_2]^(2-),[UO_2(CO_3)_3]^(4-).The simulations show that at aqueous clay interfaces,both uranyl species and surface type control the adsorption pattern.The noncarbonato and monocarbonato uranyl species can form outer-sphere complexes on siloxane surfaces through electrostatic interaction,but the dicarbonato and tricarbonato uranyl complexes rarely adsorb on the siloxane surfaces.Strong outer-sphere adsorptions of the uranylcarbonate complexes on gibbsite surfaces are observed,which are fixed by hydrogen bonds between the ligands(carbonate and/or H_2O) and surface hydroxyls.The sorption behaviors derived in this study provide new insights into understanding the migration and enrichment of uranium and other radionuclides. | Lei Li Xiandong Liu Xiancai Lu | 2015 | Chinese Journal Of Geochemistry2015，34，2： | 1 |
| 19 | Secondary Minerals of Weathered Orpiment-Realgar-Bearing Tailings in Shimen Carbonate-Type Realgar Mine,Changde, Central China显示文摘Formation and dissolution of secondary arsenic minerals often play significant roles in controlling arsenic mobility in contaminated environments, especially in sulfide mines. Weathering of the orpiment and realgar-bearing tailings from the Shimen realgar deposit, the largest realgar deposit in Asia, were studied. An integrated mineralogical analysis by using X-ray powder diffraction (XRD), Raman spectrum, scanning electron microscope (SEM) and transmission electron microscope (TEM) reveals four kinds of As-bearing secondary minerals including arsenic oxides, arsenates, As-gypsum, and As-Fe minerals. The precipitation of arsenates is due to interaction of As-bearing run-off waters and the underlying carbonate rocks, or the transformation of gypsum into arsenates or As-bearing gypsum through SO42-/HAsO42- substitution. Ca-arsenates are mainly weilite and pharmacolite with Ca/As atomic ratio of 1. Scanning transmission X-ray microscope (STXM) and X-ray absorption fine structure (XAFS) reveal that the valence of arsenic is mainly +3 and +5. | ZHU Xiangyu WANG Rucheng LU Xiancai | 2013 | 矿物学报2013，33，S1： | 1 |
| 20 | Cataclastic rheology of carbonate rocks显示文摘Based on the knowledge of the shallow-level mylonitization of detrital rocks and intrusive rocks, the poorly-known cataclastic rheology of carbonate rocks is discussed compre-hensively in this paper. The cases taken from eastern China are analyzed in various aspects including ductile-brittle fault zone, rock texture and structure, clastomylonite layer, leucocratic stress minerals, and frictional dynamometamorphism. It is proposed that the cataclastic flow structure represented by clastomylonite texture is a cooling pattern of flow assemblage charac-terized by cooling metamorphism, cooling mylonite and cooling stress minerals. Such a pattern is formed generally in mildly reducing physicochemical environments, and is commonly related to regional tectonism and mesothermal and epithermal mineralization. | LU Xiancai SUN Yan SHU Liangshu GU Lianxing GUO Jichun ZHU Wenbin | 2005 | Science China Earth Sciences2005，48，8： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员