Published 2016 | Version v1
Report Metadata-only

Potential Nano-Fe/Ca/CaO Composite Enabled Environmental Remediation Technologies for Radioactive Waste

Creators

  • 1. Department of Civil and Environmental Engineering, University of Ulsan, Ulsan 680-749 (Korea, Republic of)
  • 2. Department of Environmental Sciences, Prefectural University of Hiroshima, Shobara (Japan)
  • 3. Politehnica University, Department of Organic Chemistry, Bucharest (Romania)

Description

Radioactive cesium (137Cs) contaminated soil obtained from Fukushima was treated with nano-Fe/Ca/CaO/[PO4], approximately 27.3 wt% of magnetic and 72.75% of non-magnetic soil fractions were separated. The highest amount of entrapped 137Cs was found in the lowest weight of the magnetically separated soil fraction (i.e., 80% in 27.3% of treated soil). Results show that 137Cs either in the magnetic or non-magnetic soil fractions was 100% immobilized. While, 137Cs contaminated fly ash (containing an initial 14,040 Bq kg−1 137Cs concentration) obtained from burning wastes from Fukushima were reduced to 3,583 Bq kg−1 after treatment with nano metallic Ca/CaO methanol suspension. Furthermore, both soil/ash content and eluted solution concentrations of 137Cs were much lower than the Japanese Ministry of the Environment regulatory limit of 8,000 Bq kg−1 and 150 Bq L−1 respectively. The nano-Fe/Ca/CaO/[PO4] enabled treatment can be considered as environmental remediation of radioactive waste. (author)

Part of:
International Conference on the Safety of Radioactive Waste Management. Book of Papers

Additional details

Publishing Information

Imprint Title
International Conference on the Safety of Radioactive Waste Management. Book of Papers
Imprint Pagination
561 p.
Journal Page Range
5 p.
Report number
IAEA-CN--242

Conference

Title
International Conference on the Safety of Radioactive Waste Management
Dates
21-25 Nov 2016
Place
Vienna (Austria)

INIS

Country of Publication
International Atomic Energy Agency (IAEA)
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
48060904
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ASH CONTENT; CALCIUM OXIDES; CESIUM 137; CONCENTRATION RATIO; ENVIRONMENT; FLY ASH; FUKUSHIMA DAIICHI NUCLEAR POWER STATION; METHANOL; RADIOACTIVE WASTES; REMEDIAL ACTION; SOILS
Descriptors DEC
AEROSOL WASTES; ALCOHOLS; ALKALINE EARTH METAL COMPOUNDS; ASHES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CALCIUM COMPOUNDS; CESIUM ISOTOPES; CHALCOGENIDES; COMBUSTION PRODUCTS; DIMENSIONLESS NUMBERS; HYDROXY COMPOUNDS; INTERMEDIATE MASS NUCLEI; ISOTOPES; MATERIALS; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RADIOACTIVE MATERIALS; RADIOISOTOPES; REACTOR SITES; RESIDUES; WASTES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
4 refs., 3 figs., 1 tab.