HE Li-bin,XU Wen-lu,GU Ping,et al.Treatment of Simulated Radioactive Strontium Wastewater by Single-stage Ultra-low Pressure Reverse Osmosis Membrane Process[J].China Water & Wastewater,2021,37(9 9):105-109.
Treatment of Simulated Radioactive Strontium Wastewater by Single-stage Ultra-low Pressure Reverse Osmosis Membrane Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
105-109
Column:
Date of publication:
2021-05-01
- Keywords:
- radioactive wastewater; strontium; ultra-low pressure reverse osmosis; decontamination factor; concentration factor; comprehensive index
- Abstract:
- A single-stage ultra-low pressure reverse osmosis (RO) membrane process was designed to solve the problems of high operational pressure and low concentration factor (CF) of the RO membrane system. Simulated radioactive strontium wastewater was treated by the process through discharging permeate and recycling concentrate. When the CF was 10, effects of pressure, initial concentration and pH on the removal of strontium were explored through single factor experiment. The optimum operational parameters of RO membrane system were as follows: pressure of 0.76 MPa, initial Sr2+ concentration of 10 mg/L and pH of 9. Under this condition, the decontamination factor (DF) could reach 734. The order of influence degree of each factor on the removal of strontium from large to small was determined as follows: pH, initial Sr2+ concentration and pressure. It was necessary to consider both the influences of DF and CF when selecting the operational parameters, so a comprehensive index was introduced. Under the optimum operational condition, it was determined that CF of 10 had the best operational performance through exploring the comprehensive index with different CF (1.2-10). Compared with previous RO membrane systems, the single-stage ultra-low pressure RO membrane had more simplified process and lower energy consumption, which could provide technical support for the treatment of small amount of radioactive wastewater.
Last Update:
2021-05-01