Cesium Removal from Simulated and Actual Hanford Tank Waste Using Ion Exchange

Fiskum, Sandra K.; Blanchard, David L.; Arm, Stuart T.; Peterson, Reid A.

doi:10.1081/ss-200041760

Cited by 31 publications

(18 citation statements)

References 3 publications

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“…(9) and (10) it can be seen that percentage COD and color removals increase with the molar ratio (X 1 ), current density(X 2 ) and reaction time (X 4 ) but decrease with pH (X 3 ). A considerable effect of the interaction among the variables pH and molar ratio (H 2 O 2 /FeII) (AD); current density and reaction time (BD), and pH and reaction time (CD) is also observed.…”

Section: Regression Models and Statistical Testingmentioning

confidence: 95%

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Statistical optimization of process parameters for landfill leachate treatment using electro-Fenton technique

Mohajeri

Aziz

Isa

et al. 2010

Journal of Hazardous Materials

254

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Section: Regression Models and Statistical Testingmentioning

confidence: 95%

“…The different methods used for treating it include biological treatment [4], chemical precipitation [5], chemical oxidation [6], reverse osmosis [7], granular activated carbon adsorption [8], ion exchange resins [9], and electrochemical oxidation [10,11]. * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Statistical optimization of process parameters for landfill leachate treatment using electro-Fenton technique

Mohajeri

Aziz

Isa

et al. 2010

Journal of Hazardous Materials

254

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“…This resin has been shown to effectively remove cesium from Hanford waste, even in the presence of high concentrations (6 M) of sodium [2][3][4][5]. This high selectivity is thought to be related to the cation dehydration process at phenol groups on the resin [6].…”

Section: Introductionmentioning

confidence: 94%

A Rothmund–Kornfeld model of Cs+–K+–Na+ exchange on spherical resorcinol-formaldehyde (sRF) resin in Hanford nuclear waste

Reynolds¹,

Tardiff

2015

J Radioanal Nucl Chem

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The Hanford site, near Richland, WA, in the U.S.A., has more than 55 million gallons of high-level nuclear waste, much of which is high-ionic strength sodium and potassium containing electrolyte solutions. Sphericalresorcinol formaldehyde ion exchange resin is being developed to remove radioactive cesium from the waste. This study develops a model in the Rothmund-Kornfeld framework to predict Cs ? -K ? -Na ? selectivity on the resin. The model is found to fit the available data well, with an R 2 of greater than 0.985. The Rothmund-Kornfeld model is thus recommended for use in modelling ternary ion-exchange in Hanford waste.

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“…The use of various SPE-systems with the selectivity to various radioactive elements, such as, Sr, Tc, Cs and Ra has also been reported [157][158][159][160][161][162][163][164] and evaluated for large-scale applications [164][165][166][167].…”

Section: Selective Separation Of Radioactive Elementsmentioning

confidence: 99%

Selective separation of elements from complex solution matrix with molecular recognition plus macrocycles attached to a solid-phase: A review

Rahman

Begum

Hasegawa

2013

Microchemical Journal

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Microchemical Journal, 110: 485-493, 2013 The original publication is available at: http://dx.doi. org/10.1016/j.microc.2013.06.006 Abstract Solid-phase extraction (SPE) approach was introduced approximately five decades ago, and until then development of SPE materials is seamlessly continued. Lately, the SPE-based research is increasingly focused in developing more explicit materials to achieve meticulous separation of elements from complex solution matrices with high concentrations of interfering ions. One group of SPE materials includes those with macrocyclic ligands immobilized on a solid-phase, which are capable of selective separation and preconcentration of elements, and such selectivity in metal retention is generally termed as molecular recognition. In the process, the designed 'host' material possesses a high degree of recognition to specific elements or groups of elements called 'guest', and the recognition capability remains effective at the very low concentrations of the 'guest' species or when those present in complex matrices. The routes to the development of element-selective SPEs, the operating principles, applications and limitations are discussed in this review. KeywordsSeparation; element-selectivity; Macrocycles; Solid-phase extraction; Molecular recognition 2 Microchemical Journal, 110: 485-493, 2013 The original publication is available at: http://dx.doi.org/10.1016/j.microc.2013.06.006 IntroductionAlthough metals and metalloids are ubiquitous in nature, the environmental concentrations of both toxic and essential elements have been largely increased mostly pursuant to anthropogenic activities related to the industrial development and improved living standards in modern societies. The growing extent of metal pollution also initiated a number of legislative measures, such as, RoHS or ELV directive has been imposed to specify the limit of trace elements in the industrial products, while the EU directive defined the acceptable concentrations of different elements in cultivable soils.Sensitive analytical techniques such as, flame atomic absorption spectrometry, electrothermal atomic absorption spectrometry, inductively coupled plasma mass spectrometry, inductively coupled plasma optical emission spectrometry, and so forth are available for precise analysis of trace elements in solution. An overall analytical process comprises a number of succeeding steps, including sampling, sample preparation, separation and quantification. Among the aforementioned steps, sample preparation is by far the most important error source in modern analytical method development due to the low species concentration or heterogeneous distribution of the analytes in the matrix as well as the complex nature of the sample matrices. Therefore, a clean-up/separation step is often recommended before the analytical determination of trace elements in effluent or industrial waste waters to avoid the interfering effect from the matrix ions or to facilitate preconcentration due to their low concentrations in samples. The t...

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Cesium Removal from Simulated and Actual Hanford Tank Waste Using Ion Exchange

Cited by 31 publications

References 3 publications

Statistical optimization of process parameters for landfill leachate treatment using electro-Fenton technique

Statistical optimization of process parameters for landfill leachate treatment using electro-Fenton technique

A Rothmund–Kornfeld model of Cs+–K+–Na+ exchange on spherical resorcinol-formaldehyde (sRF) resin in Hanford nuclear waste

Selective separation of elements from complex solution matrix with molecular recognition plus macrocycles attached to a solid-phase: A review

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