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Method of treating strontium and cesium in radioactive wastewater by small-sized low-pressure reverse osmosis system

A radioactive wastewater and low-pressure reverse osmosis technology, applied in the field of water treatment, can solve the problems of large radioactive waste production, huge equipment, high cost, etc., and achieve high interception rate, low energy consumption, and broad application prospects

Active Publication Date: 2014-05-14
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional technology is relatively mature, but the equipment is huge, the amount of radioactive waste generated is large, and the cost is high.

Method used

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  • Method of treating strontium and cesium in radioactive wastewater by small-sized low-pressure reverse osmosis system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] will contain 100 μg L -1 Strontium, 100 μg L -1 The cesium raw material is hydraulically injected into the above membrane module, the operating temperature is 25±1°C, the filtration pressure is 1.0Mpa, the retention rate of strontium in the exudate is 94.5%, the retention rate of cesium is 76.1%, and the system recovery rate is 38.5%.

Embodiment 2

[0013] will contain 100 μg L -1 Strontium, 100 μg L -1 The cesium raw material is hydraulically injected into the above-mentioned membrane module, the operating temperature is 25±1°C, the filtration pressure is 0.9Mpa, the retention rate of strontium in the exudate is 94.2%, the retention rate of cesium is 75.7%, and the system recovery rate is 38.0%.

Embodiment 3

[0015] will contain 100 μg L -1 Strontium, 100 μg L -1 Cesium raw material is hydraulically injected into the above-mentioned membrane module, the operating temperature is 25±1°C, the filtration pressure is 0.75Mpa, the retention rate of strontium in the exudate is 93.5%, the retention rate of cesium is 75.2%, and the system recovery rate is 37.2%.

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Abstract

The invention provides a method of treating strontium and cesium in radioactive wastewater by small-sized low-pressure reverse osmosis system. According to the system, a type 1812-50 domestic polyamide composite film is used to separate the strontium and cesium in the radioactive wastewater, under the operating pressure not larger than 1.0Mpa; 93.5-100.0% of strontium and 75.2-99.6% of cesium are retained in exudate, and system recovery rate reaches 36.4-38.6%. The method has the advantages that the strontium and cesium in the radioactive wastewater is effectively removed, the separating process is free of phase change, energy consumption is low, operations are performed at normal temperature and simple and the method has promising application prospect in the fields of emergency wastewater treatment, nuclide concentration and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing strontium and cesium in radioactive wastewater by a reverse osmosis membrane method. Background technique [0002] The rapid development of the world economy and the continuous consumption of fossil energy make the large-scale utilization of nuclear energy an inevitable choice. During the use of radionuclides, a large amount of radioactive waste water will inevitably be produced. Especially with the rapid development of my country's nuclear power industry, the demand for economical and efficient radioactive wastewater treatment technology is becoming more and more urgent. After the nuclear leakage accident at the Fukushima nuclear power plant in Japan in March 2011, the treatment of radioactive wastewater has once again attracted the attention of the world. Representative nuclides in radioactive wastewater include cesium, strontium, ura...

Claims

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Application Information

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IPC IPC(8): G21F9/06
Inventor 杨禹侯立安丁士元顾平
Owner BEIJING NORMAL UNIVERSITY
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