当前位置： SCI文献检索 > JOURNAL OF ENVIRONMENTAL RADIOACTIVITY期刊下所有文献 > Sorption and desorption studies of radioiodine onto silver chloride via batch equilibration with its aqueous media.

Sorption and desorption studies of radioiodine onto silver chloride via batch equilibration with its aqueous media.

Abstract：

:The uncontrolled spread out of radioiodine (especially (1)(3)(1)I) produced from nuclear activities or accidents, due to its high volatility, to the biosphere represents an environmental impact because of its concentration in the thyroid gland and accumulation on soil surface. This work represents a simple method for isolation of radioiodine from aqueous solution in the form of insoluble solid compound and further recovery of it in aqueous phase for any further controlled use. Crystalline silver chloride was prepared and characterized. Batch sorption of (131)I onto the prepared AgCl was studied from different aqueous media (H2O and NaOH of different concentrations) and at different I(-):Ag molar ratios (from alkaline media) for different times at 25 °C. It was found that the sorption yield of (131)I from 2.5 M NaOH solution (at I(-):Ag and S2O3(2-):I(-) molar ratios of 0.025 and 2, respectively) reached 97.7% after 6 h and only slightly increased to 98.6% after 16 h of contact time. The presence of H2O2 adversely affected the batch sorption process. The included REDOX and precipitation reactions were discussed. Batch desorption of the sorbed (131)I from AgCl into aqueous phase was studied with NaOCl solutions of different concentrations and different contact times at 25 °C. Desorption yield of (131)I was found to be 94.5% with 10 mL of 0.5 M NaOCl solution after contact time of 16 h. Kinetic analysis has been performed for both batch sorption and desorption processes.

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Mostafa M,Ramadan HE,El-Amir MA

doi

10.1016/j.jenvrad.2015.07.022

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

9-19

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(15)30064-3

journal_volume

150

pub_type

杂志文章

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