Variable effects on electrodeionization for removal of Cs+ ions from simulated wastewater

• Published in: Desalination 2014-07, Vol.344, p.212-218
• Main Authors: Zhang, Yaping, Wang, Lei, Xuan, Sensen, Lin, Xiaoyan, Luo, Xuegang
• Format: Article
• Language: English
• Subjects: Applied sciences; Constants; Effluent concentration; Effluents; Electrodeionization; Exact sciences and technology; Flow rate; General purification processes; Low radioactive wastewater; Mathematical models; Optimization; Pollution; Reduction; Volume reduction factor; Waste water; Wastewaters; Water treatment and pollution
• ISSN: 0011-9164; 1873-4464
• DOI: 10.1016/j.desal.2014.03.034

The synthetic low radioactive wastewater containing Cs+ was treated by a four-chamber electrodeionization process at constant current. Effects of various operation parameters including electrical current, feed flow rate, the initial concentration and pH value, and the volume reduction factor are investigated respectively. The optimum variables are as follows: the electrical current is 0.14A, the feed flow rate is 6.0Lh−1, the initial Cs+ concentration is less than 50mgL−1, the initial feed pH is 7.0, and the volume reduction factor is lower than 40. Under these conditions, the effluent Cs+ concentration in the dilute chamber is below 0.05mgL−1, and the removal percentage of Cs+ can be achieved to be 99.9%. •Cs+ ions were removed by a four-chamber electrodeionization at constant current.•The optimum operation parameters were experimentally obtained.•The effluent Cs+ concentration in the dilute chamber is achieved below 0.05mgL−1.•The highest removal percentage of Cs+ is about 99.9%.