نتایج جستجو برای: Mg-Al hydrotalcite

تعداد نتایج: 747055  

2017
Khadijeh Shekoohi Fatemeh Sadat Hosseini Amir Hossein Haghighi Atefe Sahrayian

Hydrotalcites are quite prevalent in nature and their importance is growing more and more because of their very wide range of potential applications and uses. Because hydrotalcite does not exist in significant quantities in nature, coprecipitation methods are the most used for prepartion of hydrotalcite. In this study: Two types of Nano hydrotalcite compounds containing one divalent (Mg-Al) and...

Journal: :Environmental science & technology 2013
M A Gomez M J Hendry J Koshinsky J Essilfie-Dughan S Paikaray J Chen

The mineralogy and evolution of Al and Mg in U mill tailings are poorly understood. Elemental analyses (ICP-MS) of both solid and aqueous phases show that precipitation of large masses of secondary Al and Mg mineral phases occurs throughout the raffinate neutralization process (pH 1-11) at the Key Lake U mill, Saskatchewan, Canada. Data from a suite of analytical methods (ICP-MS, EMPA, laborato...

2002
N N DAS S C SRIVASTAVA

Hydrotalcite like precursors containing Pd–Mg–Al with varying molar ratios, (Pd + Mg)/Al ≈ 3 and Mg/Pd ≈ 750 to 35, were prepared by coprecipitation of metal nitrates at constant pH. Characterization of samples as synthesized and their calcined products by elemental analyses, powder XRD, TG–DTA, FT–IR spectroscopy, TPR and N2 physisorption indicated a well crystalline hydrotalcite like structur...

2014
Amaury Pérez-Verdejo Alvaro Sampieri Heriberto Pfeiffer Mayra Ruiz-Reyes Juana-Deisy Santamaría Geolar Fetter

This work presents two easy ways for preparing nanostructured mesoporous composites by interconnecting and combining SBA-15 with mixed oxides derived from a calcined Mg-Al hydrotalcite. Two different Mg-Al hydrotalcite addition procedures were implemented, either after or during the SBA-15 synthesis (in situ method). The first procedure, i.e., the post-synthesis method, produces a composite mat...

Journal: :Science & Technology Indonesia 2017

Journal: :Hue University Journal of Science: Natural Science 2018

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