نتایج جستجو برای: iranian natural zeolites

تعداد نتایج: 524536  

Journal: :Journal American Society of Mining and Reclamation 1994

2012
Domenico Fuoco

In order to study and develop an economical solution to environmental pollution in water, a wide variety of materials have been investigated. Natural zeolites emerge from that research as the best in class of this category. Zeolites are natural materials which are relatively abundant and non biodegradable, economical and serve to perform processes of environmental remediation. This paper contai...

Journal: :journal of chemical health risks 0
s. peyravi school of earth sciences, damghan university, damghan, iran r. zahiri school of earth sciences, damghan university, damghan, iran k. moradi hersini school of earth sciences, damghan university, damghan, iran

this paper concerns the removal of zn 2+ and cr 6+ ions from waste water using a naturally occurring zeolite from semnan region in iran. a continuous fixed-column study was carried out by using zeolite as a low-cost adsorbent for the removal of zn 2+ and cr 6+ ions from aqueous solution under the effect of various process parameters such as, grain size and time. the efficiency of removal is hig...

Journal: :Environmental research 1983
W N Rom K R Casey W T Parry C H Mjaatvedt F Moatamed

Fibrous zeolites have recently been implicated in an endemic outbreak of malignant pleural mesothelioma in several villages in Cappadocia in central Turkey (Baris et al., 1979; Lilis, 1981). The possible association between fibrous zeolites and mesothelioma and the potential biological activity of fibrous erionite from the United States are under active investigation. The zeolite minerals compr...

Journal: :international journal of environmental research 2010
a. rahmani j. nouri s. kamal ghadiri a.h. mahvi r. zarem

besides human dental and skeletal fluorosis, drinking water above permissible levels of fluoride is known to cause a wide range of adverse health effects. in this study, the adsorption of fluoride from aqueous solution onto pretreated zeolite has been studied by using batch test. the large surface area of natural zeolite (i. e., clinoptilolite from miyaneh region, iran) was utilized to create a...

Journal: :journal of ornamental plants 2015
a. mahboub khomami

this experiment was designed to characterize the effects of size and concentration of an iranian clinoptilolite zeolite on the growth officus benjamina (starlight) in peat base media. ficus benjamina was stock rooted and grown in a peat consisting perlite (2: 1 v/v) (p: pe), zeolite (10, 20, 30 and 40 v/v %, two sizes 0.5-3 mm and 3-8 mm) instead of peat in p: pe (2: 1 v/v) media. ficus benjami...

Journal: :international journal of nano dimension 0
f. narimani school of geology, college of science, university of tehran, tehran, iran. m. kharamesh school of geology, college of science, university of tehran, tehran, iran.

zeolites due to their structures can be used as molecular sieves for purification of materials and solutions. zeolites with phi and sod structure are so common and applicable for this purpose. hydroxy sodalite and phillipsite are the more abundant members of zeolites which display good selectivity for very small molecules and some ions such as sr, pb, zn, cu and rb. there is not any pure natura...

Journal: :Journal of Materials Science and Chemical Engineering 2019

Journal: :Science and technology of advanced materials 2008
Danielle Bonenfant Mourad Kharoune Patrick Niquette Murielle Mimeault Robert Hausler

We report the advances in the principal structural and experimental factors that might influence the carbon dioxide (CO2) adsorption on natural and synthetic zeolites. The CO2 adsorption is principally govern by the inclusion of exchangeable cations (countercations) within the cavities of zeolites, which induce basicity and an electric field, two key parameters for CO2 adsorption. More specific...

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