radioactive wastewater Articles
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Case study - Dansk Dekommisionering
Cost effective and environmentally correct handling of radioactive wastewater Client: Dansk Dekommissionering, formerly known as Forskningscenter Risø. The Institution Dansk Dekommissionering was established in September 2003 with the purpose of taking over the responsibility for the nuclear facilities at the Risoe Research Centre. Industry: Handling of radioactive water from different ...
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Innovation in radioactive wastewater-stream management. Part II: theoretical model and experimental verification
The present work is the second part of the authors' innovative method for radioactive wastewater-stream management, by volume reduction, by a mutual heating and humidification of a compressed dry air introduced through the wastewater. In this part, to determine the optimal operating conditions, a theoretical model describing volume reduction of the radioactive wastewater stream is achieved. A set ...
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Uranium removal by chitosan impregnated with magnetite nanoparticles: adsorption and desorption
A magnetic biosorbent composed of nanoparticles of magnetite covered with chitosan, denominated magnetic chitosan, was prepared. The magnetic chitosan showed a magnetic response of intense attraction in the presence of a magnetic field without becoming magnet, a typical behaviour of superparamagnetic material. Its adsorption performance was evaluated by the adsorption isotherm models of Langmuir ...
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Highly effective biosorption of Sr(II) from low level radioactive wastewater
Bacillus subtilis was first used to remove Sr(II) from low-level radioactive wastewater. Influence parameters, biosorption kinetics and biosorption equilibrium were investigated. The results showed that the maximum adsorption capacity of Sr(II) at over 2,000 mg g−1 by Bacillus subtilis was higher than for other biosorbents. At pH 6.3, Sr(II) concentration of 15 mg L−1, biomass ...
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Isotherms, thermodynamic and mechanism studies of removal of low concentration uranium (VI) by Aspergillus niger
In order to develop an effective and economical method for removing low concentration radioactive wastewater of uranium, the biomass of ‘CMCC(F)-98003’ Aspergillus niger was investigated in a batch system. The maximum uranium adsorption capacity of 12.5 mg g−1 was obtained at the initial uranium concentration of 0.75 mg L−1. The biosorption data on a biomass concentration of 0.029 g L−1 ...
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Management of water resources assessment for nuclear power plants in China
To deal with global warming and energy shortages, the nuclear power industry has flourished in China. Operation of a nuclear power plant consumes a large amount of water and discharges radioactive wastewater into nearby water bodies. Therefore, assessment and management of water resources are crucial for such projects. This article proposes the contents, procedures and methods of water ...
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Magnetic biosorbent for removal of uranyl ions
In this work magnetic biosorbent, which consisted of sugarcane bagasse as polymeric matrix with magnetite nanoparticles, was prepared. This magnetic composite has the purpose to remove uranyl ions from aqueous effluents. This magnetic biosorbent have presented superparamagnetic properties. Variables of adsorption process of uranyl ions by magnetic biosorbent in nitric solutions were investigated, ...
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Equilibrium adsorption isotherm of U(VI) at pH 4 and pH 5 onto synthetic magnetite nanoparticles
The adsorption features of synthetic magnetite nanoparticles have been investigated for removal of uranyl ions from nitric solutions. These magnetic nanoparticles can be used to adsorb contaminants in wastewater and can subsequently be removed from the medium by a magnetic process because of their superparamagnetic behaviour. The magnetite nanoparticles were synthesised by simultaneous ...
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Biosorption of uranium(VI) from aqueous solution by biomass of brown algae
Laminaria japonica The uranium(VI) adsorption efficiency of non-living biomass of brown algae was evaluated in various adsorption experimental conditions. Several different sizes of biomass were prepared using pretreatment and surface-modification steps. The kinetics of uranium uptake were mainly dependent on the particle size of the prepared Laminaria japonica biosorbent. The optimal particle size, contact time, ...
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Radioactive wastewater treatment using a mixture of TANNIX sorbent and VARION mixed bed ion exchange resin
A wastewater treatment system has been developed by using a mixture of ammonium-insoluble tannin (TANNIX, this is the trademark of an adsorbent made by Mitsubishi Nuclear Fuel Co. Ltd) and mixed (strong acid cation exchanger and strong base anion exchanger) ion exchange resin (MIX) for the selective separation of transuranium isotopes, including Pu, Am, Cm, and U, as well as fission and ...
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Innovation in radioactive wastewater-stream management: Part one
Treatment of radioactive wastewater streams is receiving considerable attention in most countries that have nuclear reactors. The first Egyptian research reactor ETRR-1 has been operating for 40 years, resulting in accumulation of large quantities of wastewater collected in special drainage tanks called SDTs. Previous attempts were aimed at the volumetric reduction of streams present in SDTs, by ...
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Nuclear Plant in southeastern United States case study
Turning Liquid Waste into Solid Money Savings using QUIK-SOLID© Project Background: A nuclear plant located in southeastern United States had to dispose of approximately 7,000 gallons (26,488 L) of liquid sludge that resulted from aggressive preventive maintenance activities. The plant stored the watery sludge in B-25 boxes (90 ft each). The slightly contaminated waste consisted of free ...
By CETCO
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Direct contact membrane distillation for nuclear desalination, Part II: experiments with radioactive solutions
This paper proposes the application of Direct Contact Membrane Distillation (DCMD) coupled with a nuclear reactor for water desalination and for low- and medium-level radioactive liquid waste concentration. Both laboratory and pilot plant experiments were carried out using the membranes reviewed in Part I of this paper. The effects of process parameters on the productivity and quality of DCMD ...
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What is Zeolite Water Treatment Media?
How is zeolite water treatment media used in water & wastewater treatment? Technology is constantly evolving and changing to meet the needs of humanity, and one of those needs is for clean water. The water treatment industry is always researching, testing, and developing new and improved ways in which to treat wastewater and drinking water in ways that are both efficient and environmentally ...
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