Search Results
You are looking at 1 - 3 of 3 items for
- Author or Editor: S. Amini x
- Refine by Access: All Content x
Abstract
The characteristics of ion exchange of uranyl and americium, which are 
-emitting radioactive nuclides, were examined by batch and column methods. SAPO-34 showed good selectivity for uranyl ion at pH 2–3.5, and distribution coefficients of Am3+ and UO
2
2+
increased with equilibrium pH. 
-irradiation (2 MGy) did not show any significant effect on the uptake of both of actinide ions onto L and SAPO-34. Higher does of -irradiation (up to 10 MGy) created a change of equilibrium pH, and hence uptake, due to radiolysis of water and heat localization generated by -radiation and annealing processes.
Abstract
The leaching behavior of 
-emitter radionuclides (uranium and americium) from zeolite-L and the zeotype (SAPO-34) in a Flexcrete-cement matrix were examined by static and dynamic methods using 0.005M CaCl2 and synthetic ground water as leachants. The leaching rates of UO
2
2+
were found to be higher by about ten orders of magnitude than those of Am3+ for both zeolite-L and SAPO-34 in the cement matrix. The static and dynamic leaching rates of UO
2
2+
for SAPO-34 in CaCl2 and synthetic ground water were ten orders of magnitude lower than those for L. SAPO-34 showed good selectivity for uranium at pH 2–3.5 and L was usefully selective for Am3+. Distribution coefficients of Am3+ and UO
2
2+
increased with equilibrium pH.
The present study was carried out to identify parasitoids of bark beetles in the forests of northern Iran, from 2013–2015 (May–August). Four hymenopterans species belonging to 3 families (Eulophidae, Pteromalidae and Braconidae) were identified as Ecphylus silesiacus (Ratzeburg, 1848), Cheiropachus quadrum (Fabricius, 1787), Rhaphitelus maculatus Walker, 1834 and Entedon ergias (Ratzeburg, 1844). Among the identified bark beetles species, T. lenkoranus Reitter, 1913 was recorded as a new host of E. silesiacus for the first time in the world.
