搜索结果: 1-15 共查到“地质学 Na”相关记录75条 . 查询时间(0.078 秒)
铁元素是能够记录太阳系氧化还原状态的关键元素之一。在阿波罗时代，科学家通过对返回的月球样品研究发现，月球样品中的铁元素主要以还原性的Fe2+和Fe0两种状态存在，仅含有极少量氧化性的Fe3+(< 1 wt%)，因此推测认为无大气的月球表面和其内部均呈一种极度还原的状态。尽管如此，近期对阿波罗样品的进一步分析发现了某些样品中含有更高含量的Fe3+，比如苦橄质玻璃珠的Fe3+/∑Fe(Fe3+在总铁含...
Uptake properties of Eu(III) on Na-attapulgite as a function of pH, ionic strength and temperature
Eu(III) Sorption Na-attapulgite pH Ionic strength Thermodynamic data
2011/11/10
Herein, the sorption properties of Eu(III) on Na-attapulgite were performed by using batch sorption experiments under different experimental conditions, such as contact time, pH, ionic strength, humic...
Sorption of uranium(VI) on Na-attapulgite as a function of contact time, solid content, pH, ionic strength, temperature and humic acid
Attapulgite U(VI) Sorption pH Ionic strength Temperature
2011/11/10
Sorption of U(VI) from aqueous solution to Na-attapulgite was investigated at different experimental chemistry conditions by using batch technique. The attapulgite sample was characterized by FTIR and...
Sorption of radiocobalt(II) from aqueous solutions to Na-attapulgite
Co(II) Sorption Na-attapulgite pH Thermodynamic parameters
2011/11/10
The sorption of Co(II) on Na-attapulgite as a function of contact time, solid content, pH, ionic strength, foreign ions, fulvic acid (FA) and temperature under ambient conditions was studied. The kine...
Synthesis and Swelling Properties of Guar Gum-g-poly(sodium acrylate)/Na-montmorillonite Superabsorbent Nanocomposite
guar gum montmorillonite superabsorbent nanocomposite swelling
2011/12/14
Novel guar gum-g-poly(sodium acrylate)/Na-montmorillonite (GG-g-PNaA/MMT) superabsorbent nanocomposites were synthesized by grafted copolymerization among natural guar gum (GG), partially neutralized ...
Litorina Sea sediments of ancient Vääna Lagoon,northwestern Estonia
Litorina Sea transgression diatoms pollen radiocarbon dating Vä ä na Lagoon
2009/10/21
Vääna Lagoon (59°22′30″N, 24°25′00″E) is located 25 km west of Tallinn in ancient Vääna Klint Bay at a 22 m Litorina Sea isobase. Lagoonal deposits were reinvestigated and new resu...
Synergistic effects of Na+-montmorillonite and multi-walled carbon nanotubes on mechanical properties of chitosan film
nanocomposites chitosan films mechanical properties multi-walled carbon nanotubes
2011/12/14
Chitosan/Na+-montmorillonite/multi-walled carbon nanotubes (CTS/MMT/MWCNTs) nanocomposite films were prepared by a simple solution-evaporation method. The effects of MMT and MWCNTs on mechanical prope...
青岛即墨Cl-Na型温泉沉积物矿物学标识与沉积相研究
Cl-Na型温泉 矿物学标识 沉积相 沉积模式
2013/11/20
经野外取样和XRD测试技术,根据温泉沉积物的矿物学标识,将即墨Cl-Na型温泉沉积物划分为喷流相、越流相沉积和喷口-通道亚相沉积,并阐述其基本概念、成因以及"盆下源"沉积模式;建立起蛋白石-石膏-岩盐-锌铅铁矾-赤铁矿喷流沉积相和通道-喷口沉积亚相的矿物学标识.上述研究有以下几方面意义:①界定温泉沉积物的概念和划分成因类型;②建立盲温泉与古地热活动寻找标识,圈定地热中心,指导现代温泉地热资源开发;...
天然Na基膨润土吸附处理高浓度PAM废水的研究
聚丙烯酰胺 吸附 等温线 Na基膨润土
2012/3/13
研究了PAM在天然钠基膨润土上的吸附行为，将其应用于含高浓度PAM（100～200 mg/L）的生产废水处理。静态条件下，膨润土的吸附平衡时间为1.5 h，最有效的吸附材料投加量为100 mg/100 mL水样。实验证明，低温度变化范围和弱酸、弱碱条件对PAM的吸附行为不产生显著影响。在最佳吸附动力学条件下，以活性炭做参比，利用实验的结论对化工厂中PAM生产废水进行吸附处理，结果表明，在对PAM废...
Notes on ephesite,terskite,Na-komarovite,ceriopyrochlore-(Ce),joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex,South Greenland
agpaite ephesite Ilimaussaq Na-komarovite nepheline syenites terskite
2011/11/8
Notes on ephesite,terskite,Na-komarovite,ceriopyrochlore-(Ce),joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex,South Greenland.
由于层间含有高价态金属阳离子的蒙脱石对特定有机物的吸附能力可大大增强 ,故分别用层间含有Na+ 、Ca2+、Al3+ 和Cr3+ 的蒙脱石对垃圾渗滤液中的有机物进行吸附实验 ,研究它们吸附苯酚、二甲苯和COD的能力及离子形态对吸附效果的影响。
Rheology of Na-Rich Montmorillonite Suspension as Affected by Electrolyte Concentration and Shear Rate
Clay-particle Interaction Clay-suspension Viscosity Na-rich Montmorillonite
2011/12/5
Abstract: Rheological measurements were used to evaluate the particle-particle associations of Na-rich montmorillonite in suspensions, under various electrolyte concentrations. A 2% free electrolyte c...
Simulations of Interlayer Methanol in Ca- and Na-Saturated Montmorillonites Using Molecular Dynamics
Methanol Molecular Dynamics Montmorillonite
2011/12/5
Abstract: Molecular dynamics computer simulations were used to study methanol molecules confined between the layers of 2:1 phyllosilicates. The model systems are based on natural Ca- and Na-rich montm...
Infrared Study of Water Sorption on Na-, Li-, Ca-, and Mg-Exchanged (SWy-1 and SAz-1) Montmorillonite
Exchangeable Cation FTIR Hydration Hysteresis Smectite Sorption Water
2011/12/2
Abstract: An environmental infrared microbalance (EIRM) cell was used to study H2O sorption on two montmorillonite samples as a function of water content and type of exchangeable cation. The vibration...
Ion Exchange of Zeolite Na-Pc with Pb2+, Zn2+, and Ni2+ Ions
Heavy Metals Ion Exchange Perlite Selectivity Selectivity Coefficient Zeolite Pc Zeolitization
2011/12/6
Abstract: This paper examines the ion-exchange properties of synthetic zeolite Na-Pc, which was produced from perlite-waste fines and has a SiO2:Al2O3 ratio of 4.45:1 and a cation-exchange capacity (C...