Transference kinetics of 60Co in an aquatic

LOW ENERGY ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS

Transference kinetics of ⁶⁰Co in an aquatic–terrestrial ecosystem

ZHAO Xiyue，

CAI Zhiqing，

GONG Fanghong，

SHI Jianjun，

WANG Shouxiang

Nuclear Science and Techniques

Vol.19, No.4

pp.213-217

Published in print 20 Aug 2008

DOI：10.1016/S1001-8042(08)60052-4

CLC：X131.3,X591

42900

The dynamics of transportation, accumulation, disappearance and distribution of ⁶⁰Co in a simulated aquatic–terrestrial ecosystem was studied by isotope-tracer technique. In the aquatic system, ⁶⁰Co was transported and transformed via depositing, coupling with ions and adsorption. The absorption resulted in the redistribution and accumulation of ⁶⁰Co in each compartment of the system. Specific activities of ⁶⁰Co in water started sharply and gently decreased. The sediment accumulated a large amount of ⁶⁰Co by adsorption and ion exchange. The hornwort (Ceralophyllum demersum) could also adsorb a large amount of ⁶⁰Co in a short time, because of its large specific surface area. Fish (Carassius auratus) and snail (Bellamya purificata) had a poor capacity of adsorbing ⁶⁰Co. The distribution of ⁶⁰Co in the fish was mainly in the viscera, and the amount of ⁶⁰Co in the snail flesh was greater than that in the shell. The amount of ⁶⁰Co in individual compartment in the system was changed with time. The highest specific activity of ⁶⁰Co in the bean of the terrestrial system remained in the root nodule.

60CoAquatic-terrestrial ecosystemCompartment modelTransference kinetics

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Transference kinetics of 60Co in an aquatic–terrestrial ecosystem

Transference kinetics of ⁶⁰Co in an aquatic–terrestrial ecosystem