Study on effect of bicarbonate alkalinity on desalination performance of eletrosorption equipment

Feed water of different bicarbonate concentrations was treated by an eletrosorption module in order to systematically study the effect of bicarbonate alkalinity on the desalination performance of eletrosorption equipment.The results show that bicarbonate alkalinity has a significant effect on desalination rate,which drops remarkably with increasing the bicarbonate concentration from 170 mg/L to 400 mg/L.Analysis of the decline of initial working current reveals that bicarbonate alkalinity store up and form the scale in the electrosprption module,which is an important reason for affecting desalination rate of electrosorption equipment.It is confirmed that the combined effect of bicarbonate alkalinity and the calcium causes the scale by the experiments.