Effective removal of cesium from wastewater solutions ...

Sep 15, 2018· This study investigates the effective removal of cesium (Cs) from aqueous solution using sewage sludge molten (SSM) slag that has undergone the surface modification with alkali (NaOH) hydrothermal treatment.

Final Report | Removal of Cesium, Strontium, Americium ...

The objective of this proposed study is the following: (1) Further investigation will be conducted on the performance and the efficiency of ELM as a separation technology for the removal of strontium, cesium, americium, plutonium and technetium from nuclear wastewater.

Sorption studies on the removal of cesium, strontium, and ...

@article{osti_370551, title = {Sorption studies on the removal of cesium, strontium, and technetium from supernatants from underground storage tanks at ORNL}, author = {Collins, J L and Egan, B Z and Anderson, K K and Chase, C W}, abstractNote = {Bench-scale batch equilibration tests have been conducted with supernatants from several tanks at the Melton Valley Storage Tank (MVST) Facility at ...

Selective Removal of Radioactive Cesium from Nuclear Waste ...

Since cesium compounds have very high water solubility, adsorption method has been widely used in the removal of radionuclide (Awual et al., 2014;Ma et al., 2011;Olatunji et al., 2015).

Removal of cesium through adsorption from aqueous ...

GO, Ferrante M, et al. Removal of cesium through adsorption from aqueous solutions:a systematic review. J Adv Environ Health Res 2018; 6(2): 96-106 Furthermore, 137Cs is a source of beta emission; therefore, it is called "heat generator".4 The chemical behavior of 137Cs is similar to sodium and potassium; hence, it can be deposited in the

Thermodynamics and Mechanism Studies on Electrochemical ...

Effect of temperatures, and ionic strength on Cs removal was investigated. Thermodynamics results showed that Cs adsorption process was exothermic in nature and favored at low temperature. Ionic strength study indicated the CuHCFIII film can selectively separate Cs in wide ionic strength range from 1 × 10–4 to 1 × 10–1 M Na+.

THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR …

Abstract. The removal of cesium, strontium, and rare earth cations from dilute aqueous solutions by adsorption on foam surfaces was studied. The primary objective in the study was to determine the technical feasibility of a foam separation process for the removal of specific nuclides from nuclear process streams.

Removal of Cesium Ions from Aqueous Solution by ...

Removal of hazardous radioactive cesium and strontium was an unresolved problem. Therefore, we developed a novel adsorbent for the removal of both cesium and strontium ions by encapsulating ...

Terrorists could make a dirty bomb ... - Los Angeles Times

Dec 27, 2019· Regulators have ignored warnings that the licensing of devices containing radioactive cesium-137 should stop, and hundreds remain in use, an L.A. Times investigation has found.

Removal of Cesium from Aqueous Solutions by Sodium and ...

Batch equilibrium experiments were carried out to study the effect of contact time, initial concentration of the metal and pH of the media on the adsorption of cesium by alginate compounds. The equilibrium time was found to be 60 min for adsorption of cesium with various initial metal concentrations.

Study on Removal of Cesium in Water Treatment System

This study investigated the removal of a radioactive cesium (Cs^ ) in the water at the water treatment processes. Since cesium is mostly present as the Cs^ ion state in water, it is not removed by ...

Cesium Removal from Simulated SRS High-Level Waste Using

CESIUM REMOVAL FROM SIMULATED SRS HIGH-LEVEL WASTE USING CRYSTALLINE SILICOTITANATE By D. D. WALKER SUMMARY This study measured the adsorption of cesium from simulated Savannah River Site liquid waste onto crystalline silicotitanate (CST) in equilibrium (IQ and ion exchange column tests. The tests used IONSIWtBIE-911(UOP LLC, Molecular Sieves ...

Tank Closure Cesium Removal (TCCR) Technology ...

• Design a modular, at -tank, ion exchange (IX) technology demonstration designed that can: ―Treat salt waste by removing cesium ―Increase salt processing capability ―Enhance bulk waste removal efforts ―Be operated by Site staff once complete • Leverage commercial supplier expertise and contemporary

Proposed Cesium-free Mineralization Method for Soil ...

Dec 31, 2017· The removal possibility of sorbed Cs from weathered biotite (WB), which is considered a major Cs adsorbent in the soil of Fukushima, has been investigated by the addition of an NaCl–CaCl 2 mixed salt powder with a 1:1 ratio of Na and Ca and subsequent heat treatment under a reduced pressure of 14 Pa. X-ray fluorescence analysis was used to determine the Cs removal rate at …

Development of a carousel ion-exchange process for removal ...

@article{osti_529752, title = {Development of a carousel ion-exchange process for removal of cesium-137 from alkaline nuclear waste}, author = {Ernest, Jr, M V and Wang, N H.L. and Bibler, J P and Whitley, R D}, abstractNote = {A systematic model-based approach is used for development of an efficient carousel ion-exchange process for the selective removal of radioactive {sup 137}Cs{sup …

Removal of cesium ion from contaminated water: Improvement ...

New biosorbents derived from a forestry waste, Douglas fir bark, were developed to remove cesium ion (Cs +) from water.Crude bark was oxidised either by 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-mediated oxidation or by the Fenton reaction to create carboxyl groups onto the bark's surface.

MODELING CST ION EXCHANGE FOR CESIUM REMOVAL FROM …

@article{osti_1014146, title = {MODELING CST ION EXCHANGE FOR CESIUM REMOVAL FROM SCIX BATCHES 1 - 4}, author = {Smith, F}, abstractNote = {The objective of this work is, through modeling, to predict the performance of Crystalline Silicotitinate (CST) for the removal of cesium from Small Column Ion Exchange (SCIX) Batches 1-4 (as proposed in Revision 16 of the Liquid Waste …

Removal of cesium ions from aqueous solutions using ...

This review focused on cesium removal using various separation technologies, including chemical precipitation, solvent extraction, membrane separation, and adsorption. The key restraints for cesium removal, as well as the recent progress of these methods have also been discussed.

Attachment B: Letter of Request for This Study | Interim ...

Letter from the Committee on Cesium Processing Alternatives for High-Level Waste at the Savannah River Site 1–9; Attachment A: Committee on Cesium Processing Alternatives for High-Level Waste at the Savannah River Site 10; Attachment B: Letter of Request for This Study 11–13

Engineering a High-Selectivity PVDF Hollow-Fiber Membrane ...

[10] Ding D, Zhang Z, Chen R, Cai T. Selective removal of cesium by ammonium molybdophosphate-polyacrylonitrile bead and membrane. J Hazard Mater 2017;324(Pt B):753–61. link1 [11] De Haro-Del Rio DA, Al-Jubori S, Kontogiannis O, Papadatos-Gigantes D, Ajayi O, Li C, et al. The removal of caesium ions using supported clinoptilolite.

REMOVAL OF RADIOACTIVE STRONTIUM AND CESIUM FROM ...

SUMMARY The effect of preparation of several vegetables and fruits on the reduction in levels of deliberately applied strontium‐89 and cesium‐134 was evaluated in a 4‐yr study. For many crop‐preparation combinations, the usual processing conditions prior to preservation by freezing, dehydration, or canning resulted in the removal of 60–95% of the applied radioactivity.

Selective Removal of Radioactive Cesium from Nuclear Waste ...

Selective ion-exchange with zeolites has been considered as one of the most promising means to remove a radioactive isotope of cesium, 137Cs, present in low concentration in seawater. However, there has been no report on the fundamental structure–property relation of zeolite-based Cs ion-exchangers. In this study, we investigate the origin of the selectivity of the radioactive cesium isotope ...

Removal of Cesium Using Cobalt-Ferrocyanide-Impregnated ...

the mass transfer of cesium ions from the bulk of liquid to the M-FC particles, leading to the rapid removal of cesium ions. In addition, the M-FC-impregnated fibers can be fab-ricated into various fiber modules for easy operation at the sites. In this study, the cobalt ion was used as a metal ion that precipitates with potassium ferrocyanide ...

Removal of Cesium in Water Using Novel Composites ...

In this study, carbonyl iron (CI) which is known as ferromagnetic synthesized with precursor of PB (FeCl 3 and potassium ferricyanide) to solve the problem of PB particles. Adsorption isotherm experiments were also conducted to evaluate the cesium removal ability of the manufactured novel composites.

A study on the evaluation of cesium removal performance in ...

Apr 26, 2018· Accordingly, this study selected the soil washing method from among several available. In this study, water is used as a washing agent for the soil washing process while a flocculating agent is added to increase efficiency. It was found that when the flocculating agent was used, maximum removal rate being about 88%.

Selective separation of cesium contaminated clays from ...

The extent of contamination can be substantial, hence ways to remediate and reduce the volume of waste for further treatment and ultimate disposal are highly desired. In the current study, flotation has been considered as an engineering solution to rapidly separate cesium contaminated clays from low-level contaminated and pristine clays.

Evaluation of a method for removing cesium and reducing ...

1. Chemosphere. 2017 Apr;172:516-524. doi: 10.1016/j.chemosphere.2016.11.139. Evaluation of a method for removing cesium and reducing the volume of leaf litter from broad-leaved trees contaminated by the Fukushima Daiichi nuclear accident during the Great East Japan Earthquake.

Study on Removal of Cesium in Water Treatment System

Abstract : This study investigated the removal of a radioactive cesium (Cs+) in the water at the water treatment processes. Since cesium is mostly present as the Cs+ ion state in water, it is not removed by sand filtration, and coagulation with polyaluminum chloride (PACl), powdered activated carbon (PAC) and mixture of PACl and PAC.