| Wang Ronghai,Xiao Detao,Li Chenglin,et al.Non-contact membrane distillation treatment and discharge method for 131I-containing wastewater from nuclear medicine departments[J].Chinese Journal of Radiological Medicine and Protection,2026,46(6):612-618 |
| Non-contact membrane distillation treatment and discharge method for 131I-containing wastewater from nuclear medicine departments |
| Received:January 18, 2026 |
| DOI：10.3760/cma.j.cn112271-20260118-00013 |
| KeyWords:Radioactive wastewater|131I|Membrane distillation|Decay tank |
| FundProject: |
| Author Name | Affiliation | E-mail | | Wang Ronghai | Radon Key Laboratory of Hunan Province, School of Nuclear Science and Technology University of South China, Hengyang 421001, China | | | Xiao Detao | Radon Key Laboratory of Hunan Province, School of Nuclear Science and Technology University of South China, Hengyang 421001, China | xiaodt@usc.edu.cn | | Li Chenglin | Guangzhou Xi'an Environmental Control High-tech Co., Ltd., Guangzhou 510000, China | | | He Zhengzhong | Radon Key Laboratory of Hunan Province, School of Nuclear Science and Technology University of South China, Hengyang 421001, China | |
|
| Hits: 3364 |
| Download times: 18 |
| Abstract:: |
| Objective To establish compliant discharge schemes for 131I-containing wastewater from nuclear medicine departments, with a view of addressing the issues of excessively large decay tank volume, prolonged storage time, and high construction costs associated with existing tank-based discharge method. Methods Based on the purification capacity of a non-contact membrane distillation wastewater treatment device, the volume of 131I-containing wastewater generated daily in hospital nuclear medicine departments, and discharge standards, two discharge schemes were developed: the monthly total activity-based discharge and the 10 Bq/L limit-based discharge. Theoretical calculations were performed to determine such parameters as process flow, decay tank volume, and 131I activity concentration at each stage within the schemes. Results The capability of non-contact membrane distillation wastewater treatment device has been shown to enable 131I retention rate to exceed 99.99% and to have superior purification effects for other non-volatile impurities. The treatment capacity for 131I-containing wastewater reached 1.5 t per day. It is able to treat wastewater with an initial 131I activity concentration on of about 106 Bq/L to be below 100 Bq/L, therefor effectively reducing the required decay storage time by 120 d. The discharge schemes designed based on the experimental result and discharge standards enable the temporary storage time required to reduce the 131I activity concentration below 10 Bq/L to be shortened to 30 d, while ensuring the total monthly 131I discharge activity to be no more than 9×106 Bq. Conclusions The compliant discharge method for 131I-containing wastewater established in this study effectively overcomes the limitations of existing tank-based discharge method, providing reliable technical support for the rapid development of nuclear medicine in China. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
