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Iron-based nano-alloys and their application in the adsorption of cesium

A nano-alloy, iron-based technology, applied in the fields of adsorption water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of non-renewable use, small adsorption capacity, and low cesium ion removal partition coefficient.

Active Publication Date: 2017-02-08
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Inorganic ion exchange materials used for cesium removal mainly include heteropoly acid salts, polyvalent metal phosphates, insoluble ferricyanide compounds, titanium silicon compounds, natural and artificial zeolites, etc. Among them, the exchange capacity of zeolite materials is easily affected by the acidity and salt of the solution. Influenced by the content, it is only suitable for the treatment of radioactive waste liquid with low acidity and low salt content, and the effect is low for waste liquid with high salinity and high acidity; the insoluble ferrocyanide exchange agent has a long exchange equilibrium time and cannot be reused; synthetic silicon titanium The compound is mainly aimed at alkaline high-level radioactive waste liquid, and the removal of cesium in acidic high-level radioactive liquid waste is less involved; the phosphate in the NASICON configuration is suitable for immobilizing radioactive waste carriers, and the distribution coefficient for the removal of cesium ions in water is relatively low. low, small adsorption capacity

Method used

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  • Iron-based nano-alloys and their application in the adsorption of cesium

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Embodiment 1

[0023] 5.40gFeCl 3 ·6H 2 O was dissolved in 100ml of deionized water. After it was completely dissolved, sodium hypophosphite was added to dissolve it as a solid. There would be white precipitates that would not affect the subsequent tests. Adjust the pH of the above solution to about 1.5 to obtain a ferrophosphorus solution. Prepare a 1mol / L aqueous solution of KBH4 and dissolve it completely. Slowly added to the ferrophosphorus solution under stirring, a brownish black precipitate appeared, the dropwise addition was completed, and the stirring was continued for 1 hour. Then centrifuge and wash several times. Vacuum dried at 80°C and calcined at 700°C for 1h.

Embodiment 2

[0025] Phosphorus-iron alloy preparation: Physicochemical and catalytic properties of Fe–Pultrafine amorphous catalysts, Baskaran Rajesh, Natarajan Sasirekha, Yu-Wen Chen, Molecular Catalysis A:Chemical275(2007)174–182; Phosphorus-iron alloy: Fe / P:4:1

Embodiment 3

[0027] Phosphorus-iron alloy preparation: Physicochemical and catalytic properties of Fe–Pultrafine amorphous catalysts, Baskaran Rajesh, Natarajan Sasirekha, Yu-WenChen, Molecular Catalysis A:Chemical275(2007)174–182; Phosphorus-iron alloy: Fe / P:7:1

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Abstract

The invention discloses an iron-based nano-alloy and an application thereof in adsorption of cesium. The application includes steps of firstly preparing a ferrophosphorus nano-alloy material through a liquid-phase chemical reduction method, and then adsorbing cesium ions in a water solution by the ferrophosphorus nano-alloy material. In the technical scheme, the cesium ions in the water solution are removed through adsorption by the iron-based nano-alloy material. The iron-based nano-alloy material is easy to prepare, is acid resistant and radiation resistant, is easy to recover and has a significant adsorption capacity on the cesium ions.

Description

technical field [0001] The invention belongs to the technical field of inorganic material adsorption, and more specifically relates to the application of an iron-based nano-alloy in the adsorption of cesium. Background technique [0002] The development of new energy represented by nuclear energy has attracted more and more attention from many countries. Nuclear fuel reprocessing is one of the most complex and challenging chemical processing processes known so far, which is one of the important reasons for the slow progress in nuclear fuel reprocessing technology. 137 Cs is a long-lived high-heat release fission product in high-level waste liquid, which accounts for a large proportion of radioactivity. It is removed and recovered in the separation process. 137 Cs can not only turn high-level radioactive waste into medium-low radioactive waste, but also make resource utilization. Common methods for separating cesium from waste liquid include ion exchange, precipitation and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/62
CPCC02F1/281C02F2101/20
Inventor 那平蔡晓娇周世民王娜刘帅
Owner TIANJIN UNIV