Abstract
The effect of HS on the ion exchange rate of SBAER was examined by measuring the mass-transfer coefficient (MTC) for chloride ions in the mixed resin's bed. As a result, the adsorbed amount of the HS dissolved in water on the SBAERs was larger than that of the HS dissolved in NaOH. Adsorption of the HS dissolved in water on the SBAERs gave no adverse effect to the ion exchange rate of them. The MTC of the gel-type resin showed a larger value than that of the macroreticular resin against the fouling with HS. As the adsorbed amount of the HS dissolved in 0.1N-NaOH increased on SBAERs, the ion exchange rate of the SBAERs decreased remarkably. These results suggest it should avoid that IERs are exposed to an excess fouling with ionic and high MW organic contaminants, in order to maintain stable demineralization rate and capacity in the water treatment.
