离子交换剂在放射性废物管理中的应用。TiO2粉末-放射性示踪剂对水溶液中Ba(II)的高效去除研究

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI:10.1016/0883-2889(92)90203-Q

Shuddhodan P. Mishra, N. Srinivasu, Dhanesh Tiwary

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引用次数: 13

摘要

以Ba-140为示踪剂，采用间歇法研究了Ba(II)在水溶液中对氧化钛(IV)的吸附行为随Ba(II)浓度、温度和溶液pH的变化规律。结果表明，吸附基本在2h内完成，不同浓度下吸附的稳态值符合经典Freundlich等温线，且符合一级动力学。溶液的pH值和温度对吸附程度有显著影响。讨论了吸附的性质和机理。

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Ion exchangers in radioactive waste management—V. A case of efficient removal of Ba(II) from aqueous solutions by TiO2 powder—radiotracer study

The adsorption behaviour of Ba(II) on titanium(IV) oxide in an aqueous solution was studied by means of batch technique as a function of Ba(II) concentration, temperature and solution pH using Ba-140 as radiotracer. The results show that adsorption is essentially complete in ca 2 h and that the steady state values of adsorption at various concentrations agree well with the classical Freundlich isotherm and follow first order kinetics. The pH and temperature of the solution markedly affect the extent of adsorption. The nature and mechanism of adsorption are discussed.

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International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes

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