China Occupational Medicine 2020;47(02):196-199

doi:10.11763/j.issn.2095-2619.2020.02.014

Preliminary development and manufacturing of radioactive sewage purification device

Xiaoyong LIU 1 ; Jianting LI ; Jie LI ; Yongshun HUANG 1 ; Xiaoshan LU ; Yanbing LIU 1 ; Fan CUI 1 ; Ming DONG 1 ; Zhanhong YANG 1 ; Jiaxin JIANG 1 ; Jian HUANG 1 ; Jiabin CHEN 1

Affiliations

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Keywords

Radioactive sewage; Filtration; Purification; Nuclide; Iodine; Potassium; Strontium; Cesium

Country

China

Language

Chinese

Abstract

OBJECTIVE: To develop a radioactive sewage purification device that can effectively filter the nuclides in low-level nuclide-contaminated wastewater. METHODS: The radioactive sewage purification device was composed of lifting pump, stack filter, multi-medium filter, security filter, tubular ultrafiltration membrane, high-pressure pump and reverse osmotic membrane. The combined process of adsorption-ultrafiltration-reverse osmosis was used to separate radioactive elements from wastewater by reverse osmosis membrane separation system. Through two-stage multi-medium filter circulation system circulation treatment, radioactive sewage was purified. The flow rate of water treatment is 20 L/min. The filtration efficiency and purification efficiency of the device were tested by filtration experiments on elements containing radionuclide and purification experiments on radionuclide.RESULTS: The filtration efficiency on iodine, potassium, strontium and cesium, that are the common elements in radioactive sewage samples were 97.88%, 98.38%, 99.99% and 99.80%, respectively. The single purification efficiency of radionuclide ~(40)K in low-level radioactive sewage was over 90.00%. CONCLUSION: The device has high filtering efficiency for common elements such as iodine, potassium, strontium and cesium in sewage and high removal rate of radioactive activity for sewage containing ~(40)K. It can be further optimized and transformed into a suitable radioactive sewage water purifier.