Journal article

Removal of metal contaminants from saline waters at low temperature by an iminodiacetic acid ion-exchange resin, Thala Valley tip, Casey Station, Antarctica

P Woodberry, G Stevens, I Snape, S Stark

SOLVENT EXTRACTION AND ION EXCHANGE | TAYLOR & FRANCIS INC | Published : 2005

Abstract

Effects of salinity and low temperature on the removal of dissolved contaminant metals from water by an iminodiacetic acid (IDA) ion-exchange resin, Amberlite IRC748, were investigated under batch equilibrium conditions. As expected for ions retained by chelation, the efficiency of the resin was reduced with low temperature. The efficiency of the resin increased with salinity: increasing salinity (from 0% seawater) reduces protonation of the resin, lowering solution pH into the optimum pH range for the retention of contaminant metal ions. Selectivities of the divalent matrix cations, Ca2+ and Mg2+, were decreased with increasing salinity: this is attributed to a shift to an ion-exchange rete..

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