The equilibirum sorption capacity of hydrous ferric oxide and ferric phosphate has been observed to increase on irradiation
with γ-rays by 5.2 and 6.6%, respectively. The rate of sorption increases differently in the irradiated exchanger materials
depending upon their characteristics nature; e.g., when the concentration of the Zn(ammine) solution is 0.10M, increase in
the F-values, caused by irradiation is significantly more striking in the case of hydrous ferric oxide than in ferric phosphate.
On the other hand, at lower external concentration of the Zn(ammine) ion (0.01M), the increase in F-values is more significant
in the case of ferric phosphate.