Chemical studies on polyaniline titanotungstate and its uses to reduction cesium from solutions and polluted milk.
Polyaniline titanotungstate (PATiW) was synthesized by the sol-gel method. Adsorption isotherm studies of Cs(+) from aqueous solution are described. Elemental Composition, chemical solubility, ion-exchange capacity (IEC) and pH-titration curve are studied. Distribution coefficients (K(d)) for 10 metal ions were determined. It was found that the polyaniline titanotungstate is highly selective to Cs(+) and the selectivity order is Cs(+)>>>Zr(4+)>Mo(6+)>V(5+)>As(5+)>Cr(3+)>Co(2+)>Cu(2+)>Zn(2+)>Cd(2+). The adsorbent capacity was determined using the Freundlich and Langmuir adsorption isotherm models. The Cs(+) adsorption isotherm data fit best to the Freundlich isotherm model. The maximum Cs(+) uptake of polyaniline titanotungstate was found to be 217 mg g(-1). Column tests were performed to determine the breakthrough curves with varying bed depths and flow rates in different solutions. The results showed that the half breakthrough time increases proportionally with increasing bed depths. Kinetic studies for removal of cesium from milk were also investigated using a scintillation detector head (NaI).
Atomic Energy Authority, Hot Laboratory Center, P. No. 13759, Cairo, Egypt.
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El-Naggar
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Zakaria
I M
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Ali
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Khalil
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El-Shahat
D000327:Adsorption; D000814:Aniline Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D000818:Animals; D002417:Cattle; D002586:Cesium / Q000737:chemistry*; D006207:Half-Life; D007474:Ion Exchange; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D008892:Milk / Q000737:chemistry; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry*; D011848:Radioactive Pollutants / Q000737:chemistry*; D017973:Tungsten Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry
D000814:Aniline Compounds; D008670:Metals; D010087:Oxides; D011848:Radioactive Pollutants; D017973:Tungsten Compounds; D014874:Water Pollutants, Chemical; C416807:polyaniline; C520567:tungsten titanate; D002586:Cesium