搜索结果: 1-15 共查到“凹凸棒石 Fe”相关记录73条 . 查询时间(0.218 秒)
Glassy (Al,Fe)2O3 in bauxites from the Southern Highlands of NSW
Glassy (Al,Fe)2O3 bauxites the Southern Highlands NSW
2012/3/30
Across the Southern Highlands of New South Wales are sporadic ferruginous bauxites, mostly overlying Eocene basalts (Owen 1954). Abundant throughout these deposits are hard, vitreous, highly magnetic ...
Mn/Fe-Mn改性HZSM-5在NH3-SCR中的催化性能
离子交换 HZSM-5 选择性催化还原 一氧化氮
2012/3/16
采用离子交换法制备了不同Mn含量及不同Fe/Mn物质的量比的HZSM-5改性分子筛,并以NH3为还原剂,在体积空速为12000h-1条件下,考察了上述催化剂选择性催化还原NO性能.同时,运用环境扫描电镜(ESEM)、比表面积(BET)和X-射线衍射(XRD)等方法对催化剂进行了表征.结果表明,改性催化剂中活性组分在载体表面呈高度分散形式,催化活性较高,复合改性较单独改性性能更为优越,适量Fe的加入...
Fe/活性炭多相类Fenton法湿式氧化罗丹明B废水的研究
Fe/活性炭 罗丹明B 湿式氧化 动力学
2012/3/14
采用自制的Fe/活性炭（Fe/AC）为催化剂，H2O2为氧化剂,组成多相类Fenton试剂催化降解罗丹明B染料废水。实验结果表明,在催化剂加入量为0.8 g/L，H2O2体积分数为0.3%,废水pH值为13,反应时间为30 min的条件下,质量浓度为200 mg/L的罗丹明B染料废水的脱色率达100%。反应动力学研究表明,罗丹明B脱色反应近似为一级反应,30℃时反应速率常数为0.02675 min...
制备了负载在Na-Y分子筛上的Fe-Cu-Mn-Y复合催化剂, 并对其在非均相UV/Fe-Cu-Mn-Y/H2O2体系中催化氧化4BS染料废水进行了研究。 结果表明, 非均相UV/Fe-Cu-Mn-Y-H2O2体系对4BS染料废水的处理具有很高的效率。 在基准条件下, 反应时间为20min时, 废水中4BS的去除率达到了93.7%。 与均相UV/Fenton体系不同, 非均相UV/Fe-Cu-Mn...
Structural Chemistry of Fe, Mn, and Ni in Synthetic Hematites as Determined by Extended X-Ray Absorption Fine Structure Spectroscopy
EXAFS Fe Oxides Hematite Metal Substitution Trace Elements XAS XRD
2011/12/6
Abstract: The incorporation of transition metals into hematite may limit the aqueous concentration and bioavailabity of several important nutrients and toxic heavy metals. Before predicting how hemati...
Effect of Phosphate on the Formation of Nanophase Lepidocrocite from Fe(II) Sulfate
Goethite Lepidocrocite Nanophase Phosphate Rietveld Analysis
2011/12/6
Abstract: The effect of phosphate on the formation of Fe oxides from Fe(II) salts is important because phosphate is a ubiquitous anion in natural environments. For this reason, the products formed by ...
The Effect of Al on Fe Oxides. XIX. Formation of Al-Substituted Hematite from Ferrihydrite at 25C and pH 4 To 7
Al-Substituted Hematite Formation of Fe Oxide Hyperfine Fields Structural OH Synthesis of Fe Oxides Unit-Cell Size
2011/12/5
Abstract: Iron oxides in surface environments generally form at temperatures of 25 ?10癈, but synthesis experiments are usually done at higher temperatures to increase the rate of crystallization. To m...
Reduction and Sorption of Chromium by Fe(II)-Bearing Phyllosilicates: Chemical Treatments and X-Ray Absorption Spectroscopy (XAS) Studies
Absorption Chromium EXAFS Phyllosilicates Reduction XANES
2011/12/6
Abstract: The reduction of hexavalent chromium species in aqueous solutions by interaction with Fe(II)-bearing solid surfaces was studied using a 0.96 × l0−3 M Cr(VI) solution and iron-rich clay...
Akimotoite, (Mg,Fe)SiO3, a new silicate mineral of the ilmenite group in the Tenham chondrite
Akimotoite Mg,Fe SiO3 new silicate mineral ilmenite group Tenham chondrite
2012/4/1
Akimotoite,(Mg,Fe)SiO ,anewsilicatemineraloftheilmenitegroup,wasfoundin3theshock-metamorphosedTenhamchondrite.Itoccursasaggregatesadjacenttoclinoen-statiteinfragmentswithinshock-inducedmeltveins.Chemi...
Calculations of fluid-ternary solid solution equilibria: An application of the Wilson equation to fluid-(Fe,Mn,Mg)TiO3 equilibria at 600 °C and 1 kbar
Calculations fluid-ternary solid solution equilibria application Wilson equation fluid-(Fe,Mn,Mg)TiO3 equilibria 600 °C 1 kbar
2012/4/1
The Wilson equation (Wilson 1964) is applied to (Fe,Mn,Mg)TiO solid solutions for obtaining
the mixing properties of the ternary solid solution at 600 ?C and 1 kbar. The present study utilizes data
...
Temperature dependence of Fe,Mg partitioning in Acapulco olivine
Temperature dependence Fe Mg partitioning Acapulco olivine
2012/4/1
The temperature dependence of the intracrystalline Fe,Mg partitioning (K ) in two olivine crys-
tals (Fa) separated from the Acapulco meteorite was determined by single-crystal X-ray structure
analy...
Fe,Mg,Mn-bearing phosphates in the GRA 95209 meteorite: Occurrences and mineral chemistry
Fe,Mg,Mn-bearing phosphates GRA95209 meteorite Occurrences mineral chemistry
2012/4/1
Two large regions of Fe,Mg,Mn-bearing phosphates, together with metal and various silicate phases,
have been observed in the GRA 95209 meteorite (a primitive achondrite belonging to the acapulcoite(R...
Partial Stabilization of Fe(II) in Reduced Ferruginous Smectite by Li Fixation
Ferric Ferrous Ferruginous Smectite Infrared Spectroscopy Li Fixation Mossbauer Spectroscopy Oxidation Reduction SWa-1
2011/12/7
Abstract: Partial stabilization of Fe(II) in chemically reduced smectite, which normally readily undergoes reoxidation in air, was achieved. The purpose of this study was to determine if Fe(II) can be...
Intrusive chemical characterization of tourmaline: M鰏sbauer study of Fe valance and site occupancy
M鰏sbauer study site occupancy Fe valance Intrusive chemical characterization of tourmaline
2012/3/31
Our recent paper noted that ?#8734;some of the existing [M?ssbauer] studies (e.g., Fuchs et al. 1995) should be discounted due to th
fact that peak widths are less than the theoretical minimum impose...
Effects of temperature and composition on the bulk modulus of (Mg,Fe)O
bulk modulus MgO FeO
2012/3/30
IsothermalstaticcompressiondataforMgOat300and1100Kwereobtainedbycom-
biningsynchrotronX-raydiffractiontechniqueswithanexternallyheatedhigh-temperature
diamond-anvilcellthatiscapableofachievingpressu...