El-Dessouky S I, El-Sofany E A, Daoud J A
Hot Laboratory Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt.
J Hazard Mater. 2007 May 8;143(1-2):17-23. doi: 10.1016/j.jhazmat.2006.08.070. Epub 2006 Sep 1.
The use of TVEX-PHOR resin for the sorption of praseodymium (III), holmium (III) and cobalt (II) from nitrate medium was carried out using batch and column techniques. Various parameters affecting the uptake of these metal ions such as v/m ratio, pH and the metal ion concentration were separately studied. Effect of temperature on the equilibrium distribution values has been studied to evaluate the changes in standard thermodynamic quantities. Experimental results of the investigated metal ions were found to fit to Freundlich isotherm model over the entire studied concentration range. Selectivity sequence of the resin for these metals is Ho>Pr>Co. The recovery of the investigated metals from the loaded resin is preformed with 0.1M sulphuric acid.
采用分批和柱技术研究了TVEX - PHOR树脂从硝酸盐介质中吸附镨（III）、钬（III）和钴（II）的情况。分别研究了影响这些金属离子吸收的各种参数，如v/m比、pH值和金属离子浓度。研究了温度对平衡分布值的影响，以评估标准热力学量的变化。在所研究的整个浓度范围内，发现所研究金属离子的实验结果符合弗伦德里希等温线模型。该树脂对这些金属的选择性顺序为Ho>Pr>Co。用0.1M硫酸从负载树脂中回收所研究的金属。
