搜索结果: 1-13 共查到“凹凸棒石 Zn”相关记录13条 . 查询时间(0.059 秒)
Assessment of Soil Heavy Metal Cu, Zn and Cd Pollution in Beijing, China
Beijng Cd Cu Soil Heavy Metal Pollution Zn
2011/10/1
The soil heavy metal pollution have be paid more attention because the sources of soil heavy metals become multiple and complicated with the accelerated urbanization. According to this research, the o...
Zn-Doped Palygorskite Loaded TiO2 for Visible-Light Active Catalysts
Catalyst Palygorskite TiO2 Visible Light
2011/5/1
Zn-doped palygorskite loaded TiO2 for visible-light active catalysts were prepared by the method of liquid ion exchange and precipitation. XRD and SEM measurments show that the titanium dioxide was lo...
The Impact of EC and pH on the Adsorption of Zn and Cd by Palygorskite Mineral
Palygorskite Zn Cd Langmuir Freundlich adsorption
2008/1/1
The effects of various experimental parameters were investigated using a batch adsorption technique. Adsorption of Cd and Zn by pure palyorskite as a function of pH(pH 6, 8 and 10), EC (EC 4, 6 and 8)...
本研究旨在探索锌离子与凹凸棒石黏土组装的优化工艺条件及其抗菌性能，并剖析该组装物对肉鸡生长和免疫的调节作用，为凹凸棒石黏土的合理应用，开发新型饲料添加剂提供参考依据，试验共分三部分： 试验一采用离子交换的方法制备载锌凹凸棒石黏土，探索和分析交换液离子浓度、溶液pH值、反应温度、交换时间对锌交换量的影响；通过X射线衍射分析对锌离子与凹土的组装体进行了表征；用原子吸收光谱仪测定了载锌凹土的锌离子含量；...
坡缕石对Zn^2＋的吸附性能及吸附工艺条件优化研究
坡缕石 Zn^2＋ 吸附 工艺优化
2004/2/29
从坡缕石粘土提纯人手，进行了坡缕石吸附Zn^2 的实验研究，结果表明坡缕石对水中Zn^2 的吸附性能主要受振荡速度、吸附时间、溶液pH值、吸附剂用量等因素影响，30℃时坡缕石对Zn^2 的等温吸附曲线同时符合Langmuir方程和BET方程。在本实验条件下，坡缕石对水中的Zn^2 (20mL，Zn^2 浓度均为50mg／L)的最佳吸附工艺条件为：振荡速度150r／min，吸附时间120min，吸附...
膨润土吸附重金属离子的影响因素初探：以Zn^2＋为例
膨润土 重金属离子 吸附 影响因素
2001/5/25
对影响膨润土吸附重金属离子Zn^2 的因素进行的初步研究表明：在一定条件下，提高吸附温度，提高溶液的pH值，增加溶液中Zn^2 初始浓度，增加吸附作用时间，提高搅拌速度和减小膨润土的粒度都能不同程度地提高吸附量。同时讨论了吸附机理。
Coprecipitates of Cd, Cu, Pb and Zn in Iron Oxides: Solid Phase Transformation and Metal Solubility after Aging and Thermal Treatment
Aging Study Coprecipitation Electron Microprobe Analysis Ferrihydrite Transformation Metal Solubility Rate of Titration Thermal Treatment
1998/10/1
Abstract: Solid phase transformation and metal solubility were monitored after coprecipitation of Cd2+, Cu2+, Pb2+ and Zn2+ with Fe3+ to form ferrihydrite by titration to pH 6. The (co)precipitates we...
Gibbs energies of formation for hydrocerussite [Pb(OH)2·(PbCO3)2(s)] and hydrozincite {[Zn(OH)2]3·(ZnCO3)2(s)} at 298 K and 1 bar from electrochemical cell measurements
Gibbs energies hydrocerussite [Pb(OH)2·(PbCO3)2(s)] hydrozincite {[Zn(OH)2]3·(ZnCO3)2(s)} electrochemical cell measurements
1998/7/30
New values are reported for the Gibbs energies of formation from the elements for hydrocerussite Pb(OH)2·(PbCO3)2 and hydrozincite [Zn(OH)2]3·(ZnCO3)2. These D values 0 G f were obtained from electroc...
Rehydration of Zn-Al Layered Double Hydroxides
Hydrotalcite Hydrothermal Treatment Layered Double Hydroxide Reconstruction
1997/12/1
Abstract: Rehydration is shown to be straightforward for the reconstruction of polyoxometallate-pillared layered double hydroxides. Zn-Al hydrotalcite-like minerals were prepared with Zn/Al ratios of ...
Brazilian Red Latosol a Typic Soil as an Exchanger: A Thermodynamic Study Involving Cu, Zn, Cd, Hg, Pb, Ca and Na
Adsorption Ionic Exchange Isotherm Langmuir Method Red Latosol Soil
1997/4/1
Abstract: The thermodynamic cationic exchange process involving divalent (Cu, Zn, Cd, Hg, Pb and Ca) and monovalent (Na) cations in Brazilian red Latosol soil was studied. Using a batchwise method, th...
Bechererite, (Zn,Cu)6Zn2(OH)13[(Si,S)(O,OH)4]2, a novel mineral species from the Tonopah-Belmont mine, Arizona
Bechererite (Zn,Cu)6Zn2(OH)13[(Si,S)(O,OH)4]2 Tonopah-Belmont mine
1996/2/5
Bechererite is a new mineral found ondump material from the Tonopah-Belmont mine, Maricopa County, Arizona, U.S.A. It occurs as thin elongated crystals, commonly in hemispherical aggregates, and it is...
The crystal structure of namuwite, a mineral with ZN in tetrahedral octahedral coordination, and its relationship to the synthetic basic zinc sulfates
The crystal structure of namuwite ZN coordination relationship synthetic basic zinc sulfates
1996/2/5
The crystal structure of namuwite, (Zn,Cu)4S04(OHk4H20, trigonal, a = 8.331(6), C = 10.54(1) A,V=634(1) A3,Pj, Z = 2, has been solved by direct methods and refined to an R index of 7.9% using MoKa X-r...
Preparation and Characterization of Al-Rich Zn-Al Hydrotalcite-Like Compounds
Hydrotalcite Nuclear magnetic resonance Scanning-transmission electron microscopy Synthesis X-ray powder diffraction Zinc
1989/10/1
Hydrotalcite-like compounds, described by the formula [Zn1-xAlx(OH)2][(CO3)x/2 · nH2O], were prepared by coprecipitation methods at 80°C and characterized by bulk chemical analysis, X-ray powder diffr...