Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

The simultaneous removal of technetium and iodine from Hanford tank waste

Journal Article · · Chemical Engineering Journal
The simultaneous removal of radionuclides technetium-99 and iodine-129 from an actual decontaminated Hanford tank waste sample (a mixture of decontaminated waste from tanks 241-AP-105 and 241-AP-107) was demonstrated for the first time in this work. A series of commercially available ion exchange resins were evaluated in batch contact tests in the tank waste, and all showed removal of both Tc and I. The highest Tc removal was observed for Purolite A530e while the highest iodine removal was observed for ResinTech SIR-110-MP. Batch tests in simulated tank waste with these two resins showed that the SIR-110-HP-MP had consistently higher Kd for both pertechnetate and iodide and much higher Kd than previous works on Tc removal from Hanford waste. As such, the SIR-110-MP was evaluated in a dual -column (lead/lag) test processing 5.2L of the tank waste mixture showing 60% breakthrough of Tc on the lead column and no significant breakthrough on the lag after 625 bed volumes (BV, 6 mL size) while significant iodine breakthrough (>50%) occurred after 28 BV. The limited iodine uptake was attributed to the column conditions generating mass transfer limitations. A fraction of the Tc and I was not captured by the resin (<10%) in either the batch tests or column tests. The iodine fraction was identified to be an iodide, likely organo-iodide. The fraction of the Tc was identified as a non-pertechnetate species, which is the first time non-pertechnetate has been identified in AP-105 and AP-107 tanks, although the exact species is still unknown.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Environmental Management (EM); USDOE Office of Environmental Management (EM), Technology Development
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2458236
Alternate ID(s):
OSTI ID: 2345839
Report Number(s):
PNNL-SA--189635
Journal Information:
Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Vol. 490; ISSN 1385-8947
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (66)

A history of Hanford tank waste, implications for waste treatment, and disposal journal December 2020
Behavior of technetium in nuclear waste vitrification processes journal January 2015
Evaluation of iodine speciation and 129I/127I ratios at low concentrations in environmental samples using IC-ICP-MS journal January 2021
Efficient removal of iodide/iodate from aqueous solutions by Purolite A530E resin journal January 2023
99Tc NMR Spectroscopy journal July 2005
The removal of the pertechnetate ion and actinides from radioactive waste streams at Hanford, Washington, USA and Sellafield, Cumbria, UK: the role of iron-sulfide-containing adsorbent materials journal December 2003
Surface functionalized nanofibers for the removal of chromium(VI) from aqueous solutions journal June 2014
Analysis of technetium immobilization and its molecular retention mechanisms by Fe(II)-Al(III)-Cl layered double hydroxide journal March 2021
Technetium-99 decontamination from radioactive wastewater by modified bentonite: batch, column experiment and mechanism investigation journal January 2022
Highly selective removal of Technetium-99 using imidazolium-based macroporous anion exchange resins journal June 2023
Reductive immobilization of pertechnetate in soil and groundwater using synthetic pyrite nanoparticles journal May 2017
Effects of hydrated lime on radionuclides stabilization of Hanford tank residual waste journal October 2017
Decontamination of radioactive wastewater: State of the art and challenges forward journal January 2019
Review of intermediate-scale field tests in support of disposal of waste forms journal January 2024
Risk to ecological resources following remediation can be due mainly to increased resource value of successful restoration: A case study from the Department of Energy's Hanford Site journal July 2020
Effects of speciation on partitioning of iodine in aqueous biphasic systems and onto ABEC® resins journal July 2004
Characterization of spent Purolite A530E resin with implications for long-term radioactive contaminant removal journal October 2020
Radioiodine sorption/desorption and speciation transformation by subsurface sediments from the Hanford Site journal January 2015
Bioregeneration of perchlorate-laden gel-type anion-exchange resin in a fluidized bed reactor journal May 2010
Getters for improved technetium containment in cementitious waste forms journal January 2018
Impact of oxidation and carbonation on the release rates of iodine, selenium, technetium, and nitrogen from a cementitious waste form journal May 2023
Accumulation mechanisms for contaminants on weak-base hybrid ion exchange resins journal October 2023
Volatile species of technetium and rhenium during waste vitrification journal February 2018
Iodine solubility in a low-activity waste borosilicate glass at 1000°C journal September 2014
The function of Sn(II)-apatite as a Tc immobilizing agent journal November 2016
A short history of waste management at the Hanford Site journal January 2010
Iodine immobilization by materials through sorption and redox-driven processes: A literature review journal May 2020
Removing nitrate from water using iron-modified Dowex 21K XLT ion exchange resin: Batch and fluidised-bed adsorption studies journal January 2016
Identification and Quantification of Technetium Species in Hanford Waste Tank AN-102 journal September 2020
Removal of TcO 4 from Representative Nuclear Waste Streams with Layered Potassium Metal Sulfide Materials journal May 2016
Reduction and Simultaneous Removal of 99 Tc and Cr by Fe(OH) 2 (s) Mineral Transformation journal July 2017
Review of the Scientific Understanding of Radioactive Waste at the U.S. DOE Hanford Site journal January 2018
Iodine Removal from Carbonate-Containing Alkaline Liquids Using Strong Base Resins, Hybrid Resins, and Silver Precipitation journal February 2023
Hybrid Sorbents for 129 I Capture from Contaminated Groundwater journal May 2020
Task-Specific Tailored Cationic Polymeric Network with High Base-Resistance for Unprecedented 99TcO4 Cleanup from Alkaline Nuclear Waste journal August 2021
Removal of Pertechnetate from Simulated Nuclear Waste Streams Using Supported Zerovalent Iron journal November 2007
Identification of the Non-Pertechnetate Species in Hanford Waste Tanks, Tc(I)−Carbonyl Complexes journal January 2004
Anion Exchange Resins for the Selective Separation of Technetium from Uranium in Carbonate Solutions journal July 2012
Design, Synthesis, and Uptake Performance of ABEC Resins for the Removal of Pertechnetate from Alkaline Radioactive Wastes journal April 1999
Temperature and Isotope Substitution Effects on the Structure and NMR Properties of the Pertechnetate Ion in Water journal September 2004
Removal of TcO 4 ions from solution: materials and future outlook journal January 2016
Removal of hexavalent chromium by anion exchange: non-target anion behavior and practical implications journal January 2021
Characterization of SuperLig ® 639 Rhenium and Technetium Resin with Batch Contact and Column Tests journal December 2015
Tc removal from the waste treatment and immobilization plant low-activity waste vitrification off-gas recycle journal May 2017
Impact of feed variability on cesium removal with multiple actual waste samples from the Hanford site journal March 2022
Extraction of Technetium From Simulated Hanford Tank Wastes journal April 1995
Review: Waste-Pretreatment Technologies for Remediation of Legacy Defense Nuclear Wastes journal January 2011
Aqueous Biphasic Extraction Chromatography (Abec™): Uptake of Pertechnetate from Simulated Hanford tank Wastes journal July 1997
Superlig® 639 Equilibrium Sorption data for Technetium from Hanford tank Waste Supernates journal April 2002
Multiple Ion Exchange Column Tests for Technetium Removal from Hanford Site Tank 241‐AW‐101 with Superlig®639 Resin journal December 2004
Technetium Removal from Hanford and Savannah River Site Actual Tank Waste Supernates with Superlig ® 639 Resin journal January 2003
Removal of Technetium from Hanford Tank Waste Supernates journal January 2005
Column Performance Testing of SuperLig® 639 Resin with Simulated Hanford Waste Supernates: Identification of the Primary Sorbing Species and Detailed Characterization of Their Desorption Profiles journal February 2005
From legacy contamination to watershed systems science: a review of scientific insights and technologies developed through DOE-supported research in water and energy security journal March 2022
An Integrated Framework for Evaluating Leaching in Waste Management and Utilization of Secondary Materials journal May 2002
NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001) journal January 2001
Silver-based getters for 129I removal from low-activity waste journal January 2016
Marine Sediment Toxicity Identification Evaluation Methods for the Anionic Metals Arsenic and Chromium journal January 2007
Distributions of 14 elements on 63 absorbers from three simulant solutions (acid-dissolved sludge, acidified supernate, and alkaline supernate) for Hanford HLW Tank 102-SY report August 1994
Evaluation of Ammonium and Iodine Decontamination Factors for Hanford's Waste Treatment and Immobilization Plant Feed in the Effluent Treatment Facility report June 2021
Follow-on Report of Analysis of Approaches to Supplemental Treatment of Low-Activity Waste at the Hanford Nuclear Reservation (Supporting Information Vol. II) report April 2022
Measurement of Iodine, Iodide, and Iodate in Hanford Tank Waste: Technology Transfer from PNNL to Hanford 222-S Laboratory report September 2021
Technetium in alkaline, high-salt, radioactive tank waste supernate: Preliminary characterization and removal report January 1997
Electrochemical reduction removal of technetium-99 from Hanford tank wastes report September 1997
Removal of technetium from alkaline nuclear-waste media by a solvent-extraction process using crown ethers report July 1995
Review of recent developments in iodine wasteform production journal December 2022