NDLI: Synthesis and characterization of polyaniline-titanium tungstophosphate; Its analytical applications for sorption of Cs$^{+}$, Co$^{2+}$, and Eu$^{3+}$ from waste solutions

Content Provider	Springer Nature Link
Author	El Aryan, Y. F. El Said, H. Abdel Galil, E. A.
Copyright Year	2014
Abstract	Crystalline phases of polyaniline-titanium tungstophosphate composite material were synthesized via sol-gel procedure by incorporating the organic polymer polyaniline into the matrix of an inorganic precipitate of titanium tungstophosphate. The physicochemical properties of this hybrid material were determined using atomic absorption spectrophotometry, CHN elemental analysis, X-ray diffraction and X-ray fluorescence analysis, IR spectroscopy, thermal analysis, and scanning electron microscopy. According to the data obtained, the chemical formula of polyaniline-titanium tungstophosphate can be presented as [(WO$_{3}$)(TiO$_{2}$)$_{4}$(H$_{3}$PO$_{4}$)$_{3}$ + (-C$_{6}$H$_{4}$NH-)]·8H$_{2}$O. The material shows monofunctional ion-exchange characteristic and exhibits enhanced resistance to HNO$_{3}$, HCl, and alkaline media. The ion-exchange capacity of polyaniline-titanium tungstophosphate for Cs$^{+}$, Co$^{2+}$, and Eu$^{3+}$ ions was found to be 3.63, 1.55, and 1.30 mg-equiv g$^{−1}$, respectively, exceeding the ion-exchange capacity of other composite and inorganic ion exchangers. The material was found to be highly selective to Eu3+, with the following selectivity series: Eu$^{3+}$ > Cs$^{+}$ > Co$^{2+}$. The thermodynamic functions (ΔG $^{0}$, ΔS $^{0}$, and ΔH $^{0}$) of the adsorption of Cs$^{+}$, Co$^{2+}$, and Eu$^{3+}$ ions onto polyaniline-titanium tungstophosphate were calculated. They show that the overall adsorption process is spontaneous and endothermic.
Starting Page	614
Ending Page	621
Page Count	8
File Format	PDF
ISSN	10663622
Journal	Radiochemistry
Volume Number	56
Issue Number	6
e-ISSN	16083288
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-12-18
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	synthesis polyaniline-titanium tungstophosphate distribution studies radionuclides thermodynamic functions Nuclear Chemistry Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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