An investigation into the use of cuprous chloride for the removal of radioactive iodide from aqueous solutions

作者：Liu, Yang; Gu, Ping; Jia, Lin; Zhang, Guanghui^*

来源：Journal of Hazardous Materials, 2016, 302: 82-89.

DOI：10.1016/j.jhazmat.2015.09.045

• Radioactive water
• Iodide removal
• Precipitation
• Cuprous chloride
• Deoxygenation

Cuprous chloride (Cud) was examined as a precipitant to remove iodide (I-) from aqueous solutions. The effects of the dosage of CuCl, reaction time, initial concentrations of I- and bicarbonate (HCO3-) on I- removal were investigated. The results showed that the optimized removal efficiency of I- reached approximately 95.8% when the dosage was 150 mg/L, the initial I- concentration ranged from 5 to 40 mg/L and the reaction time was 15 min. The removal efficiency decreased from 95.8% to 76.0% with the addition of HCO3- at a concentration in the range of 0-107 mg/L. Furthermore, the dissociation of CuCl, the disproportionation reaction of Cu+, the precipitation of cuprous iodide (CuI) and cuprous oxide (Cu2O), and the formations of copper sulfide (CuxS, 1 <= x < 2) were identified as the primary reactions using the PHREEQC software and the measurements of water quality parameters under various conditions. X-rays photoelectron spectroscopy (XPS) analysis was performed before and after the reaction, helping to elucidate the reaction mechanism. This study can provide a promising method to address radioactive I- pollution in water.

• 出版日期2016-1-25
• 单位天津大学