نتایج جستجو برای: iranian natural zeolites

تعداد نتایج: 524536  

Journal: :Dalton transactions 2017
Natsume Koike Watcharop Chaikittisilp Kenta Iyoki Yutaka Yanaba Takeshi Yoshikawa Shanmugam Palani Elangovan Keiji Itabashi Tatsuya Okubo

Zeolites containing Zn in their frameworks are promising materials for ion-exchange and catalysis because of their unique ion-exchange capabilities and characteristic Lewis acidity. However, expensive organic compounds often required in their synthesis can prevent their practical uses. Here, a facile organic-free synthesis route for new zincoaluminosilicate zeolites having MOR topology, in whic...

2010
D.M.A. Melo J. R. de Souza M.A.F. Melo A. E. Martinelli J. D. Cunha

Mesoporous materials can be generally used as adsorbents to remove impurities from gases. During the past few years, H2S has been removed from natural gas using materials such as dolomite, zeolites, and industrial compounds, which can be widely used by oil and natural gas companies. The present study focused on the use of Zeolite 13X and Zinox 380 as H2S adsorbent at 25 C. They were characteriz...

Journal: :health scope 0
ahmad nikpey department of occupational health, qazvin university of medical sciences, ir iran +98-09126820763, [email protected]; department of occupational health, qazvin university of medical sciences, ir iran +98-09126820763, [email protected] hossein kazemian department of chemical and biochemical engineering, faculty of engineering, western university (uwo), london, ontario, canada ali safari-varyani department of occupational health, qazvin university of medical sciences, ir iran +98-09126820763, [email protected] marjan rezaie department of occupational health, tehran university of medical sciences, ir iran majid sirati-sabet department of biochemistry and genetic, qazvin university of medical sciences, ir iran

background lead poisoning impairs memory and learning. objectives the protective effect of natural zeolite clinoptilolite on memory and learning impairment in rats exposed to lead acetate was investigated. materials and methods 60 male wistar rats in six groups treated for 2 months with diets contained different ratios of natural zeolite(i.e. 5% or 12.5%), and %0.2 lead acetate (la) concentrati...

Journal: :Proceedings of the National Academy of Sciences 1999

Journal: :Journal of Society of Materials Engineering for Resources of Japan 2001

Journal: :آب و خاک 0
فرحناز سهراب نادر عباسی آزاده مهدی پور

introduction: soil structural stability affects the profitability and sustainability of agricultural systems. particle size distribution (psd) and aggregate stability are the important characteristics of soil. aggregate stability has a significant impact on the development of the root system, water and carbon cycle and soil resistance against soil erosion. soil aggregate stability, defined as t...

2015
Xuehua Liu Soledad Valero Estefania Argente Vicente Botti

The database of prospective zeolites (www. hypotheticalzeolites.net) has been screened in search of feasible zeolites. Previous criteria of zeolite feasibility have been reviewed, based on descriptors such as energy, density, average and distribution of ring sizes, and more importantly that of Li et al. (LID criteria) presented recently [Angew. Chem. Int. Ed. 2013, 52, 1673], based on Si–O, O.....

Journal: :Chemical communications 2015
Teerawit Prasomsri Wenqian Jiao Steve Z Weng Javier Garcia Martinez

Surfactant-templating is one of the most versatile and useful techniques to implement mesoporous systems into solid materials. Various strategies based on various interactions between surfactants and solid precursors have been explored to produce new structures. Zeolites are invaluable as size- and shape-selective solid acid catalysts. Nevertheless, their micropores impose limitations on the ma...

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