Multi-Contaminant Removal by Combined Ion Exchange Using Bicarbonate and Potassium as Mobile Counter Ion

摘要

The initial ground work to determine the possibility of using potassium and bicarbonaternin combined ion exchange (CIX), for the removal of multiple contaminants, was set forth byrndesigning binary exchange analysis through batch experiments. Binary exchange analysis wasrnused to determine the separation factor of resins, in potassium (K~+) and bicarbonate (HCO_3~-)rnform, for a particular contaminant. Results showed that nitrate had high affinity for A520EHCO3rnand calcium had a high affinity for C150-K, as more contaminants were found in the resinrnphase versus in solution. This result coincide with up to 96% and 99% nitrate and calciumrnremoval respectively. Moving forward, this data can then be used to design CIX by using cationrnexchange resin (CER) C150-K and anion exchange resin (AER) A520E-HCO3 for simultaneousrnremoval of nitrate and calcium.