Conveners
Radionuclides in the Environment, Radioecology 4
- Fernando P. Carvalho (Nuclear and Technological Institute)
- Peter Burns (University of Notre Dame)
Description
(session dedicated to the memory of prof. Petr Beneš)
Prof.
Ioannis Pashalidis
(Department of Chemistry, University of Cyprus)
16/05/2014, 08:30
Radionuclides in the Environment, Radioecology
Invited
The present study aims to assess the effect of redox conditions existing within a phosphogypsum disposal site on the redox stability and mobility of uranium in the disposed material. Phosphogypsum sampling and in-situ measurements were carried out at a coastal stack in Vasiliko, Cyprus. pH, EH and solubility experiments were performed in-situ and in laboratory systems. Generally, in the open...
Dr
Irina Vlasova
(Lomonosov Moscow State Univercity)
16/05/2014, 09:00
Radionuclides in the Environment, Radioecology
Verbal
The sedimentary rocks aquifers are used as the reservoir beds for the deep injection of liquid nuclear waste (LNW) in Russia. The reservoir beds are located at the depth of 290-370 m and are limited from above and from below by the impermeable clayey strata. LNW injections vary in composition including acidic technological wastes, which consist of sodium nitrate, acetic acid, corrosion...
Dr
Vladimir Petrov
(Lomonosov Moscow State University)
16/05/2014, 09:15
Radionuclides in the Environment, Radioecology
Verbal
The repository for high level wastes (HLW) and spent nuclear fuel (SNF) in Russia is planned to be constructed in the deep underground crystalline rock formations near the Krasnoyarsk. Three areas of the Nizhnekansky Granite Massive, namely “Kamenny”, “Itatsky” and especially “Eniseysky”, are supposed as the most perspective locations for the future HLW and SNF disposal site. Physical and...
Dr
Timothy Payne
(Australian Nuclear Science and Technology Organisation)
16/05/2014, 09:30
Radionuclides in the Environment, Radioecology
Verbal
The adsorption of strontium and organic acids on MX80 bentonite in NaCl solutions was investigated in batch experiments. The organic acids included five dicarboxylic acids (HOOC(CH2)nCOOH) of various alkyl chain lengths (n = 0, 2, 4, 7 and 18) and three aromatic acids (benzoic, salyclic and gallic acids). The objective of the work was to study the interactions occurring in bentonite systems...
Dr
Seung Soo KIM
(Korea Atomic Energy Research Institute)
16/05/2014, 09:45
Radionuclides in the Environment, Radioecology
Verbal
A large quantity of acidic waste solution containing uranium is generated when U-contaminated soil and concrete are decontaminated using nitric or sulfuric acid in the electrokinetic equipment. If the uranium in the solution selectively sorbed on an ion exchange resin or extracted by a proper reagent, the acid would be recycled, and a very small amount of sludge would be generated. Two strong...
