TY - JOUR ID - 6954 TI - Isomorphous Substitution of P(V) in Natural Clinoptilolite: Evalution of the Product for Removal of NO3-, NO2- and F - from Aqueous Solutions JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Faghihian, Hossein AU - Mohammadi, Mohammad Hadi AD - Department of Chemistry, University if Isfahan, P.O. Box 81746-73441 Isfahan, I.R. IRAN Y1 - 2008 PY - 2008 VL - 27 IS - 4 SP - 115 EP - 118 KW - Nitrate removal KW - Isomorphous substitution KW - Clinoptilolite KW - Anion exchanger DO - 10.30492/ijcce.2008.6954 N2 - 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 was prepared under melting conditions from natural clinoptilolite. It was characterized by XRD, XRF, DTG and SEM techniques. The characterization process revealed that product is different from AlPo. Ion exchange property of the 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. UR - https://ijcce.ac.ir/article_6954.html L1 - https://ijcce.ac.ir/article_6954_290534b1a3472f0d9b823e7fddedf02b.pdf ER -