سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۵

نویسنده(ها):

Hossein Faghihian – Department of Chemistry, University of Isfahan,Isfahan 81746-73441, Iran
Hossein Kazemian – R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran, Iran,
Mohammad Hadi Mohammadi – Department of Chemistry, University of Isfahan,Isfahan 81746-73441, Iran

چکیده:

Nitrate is an anion of major importance particularly in biological areas. Excessive amounts in water
supplies indicate pollution from sewage or agricultural effluents. The effects of excessive quantities of nitrate
in water are well known. In this research structural modification of natural clinoptilolite by isomorphic
substitution was performed. Isomorphously substituted zeolite, silicoaluminophosphate (SAPo) was prepared
under melting conditions from natural clinoptilolite. It was characterized by XRD, XRF, FT-IR, DTG and
SEM techniques. The characterization process revealed that product is different from AlPo. Ion exchange
property of the new modified product was studied for NO3
-, NO2
– and F- ion. The uptake of F- was higher
than those of NO3
– and NO2
-. Anion exchange Isotherms were constructed for NO3
– and discussed. The ion
exchange chromatography and neutron activation technique were used to study the extent of the exchange.