Reduction of methylene blue (MB) by ammonia in nanomordenite and mordenite zeolites: Method for the determination of ammonia concentration

Zeolites are crystalline silico-aluminates with a very precise micro-porous structure and present some wellknown general features responsible for their extensive applications in catalysis, adsorption and ion exchange[1]. These properties are related to the possibility of generating and regulating the acid-base and hydrophobic-hydrophilic character, and strong selective adsorption affinities. The properties of the zeolite depend mainly on the particular zeolite structure, framework composition, cation nature and pore structure, and can be easily modified[2]. Zeolite parameters such as particle size, surface area, pore diameter, mechanical strength, microbial reSh.Sohrabnezhad1*, A.Pourahmad2, B.Sadeghi.G3 Department of Chemistry, Faculty of Science, University of Mohaghegh Ardebili, (IRAN) Department of Chemistry, Faculty of Science, Islamic Azad University, Rash Branch, Rasht, (IRAN) Department of Chemistry, Faculty of Science, Islamic Azad University, Tonekabon Branch, Tonekabon, (IRAN) E-mail: sohrabnezhad@uma.ac.ir Received: 19 April, 2007 ; Accepted: 24 April, 2007