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Title: Humic acid removal from aqeous solution by hybrid eletrodialysis/ion exchange
Keywords: hybrid electrodialysis/ion exchange; humic acid; electric field; ion exchange membrane; ion exchange resin
Issue Date: 4-Nov-2004
Source: CHEN GENTU (2004-11-04). Humic acid removal from aqeous solution by hybrid eletrodialysis/ion exchange. ScholarBank@NUS Repository.
Abstract: This study describes the applicability of hybrid electrodialysis/ion exchange in removing humic acid from aqueous solutions. Experiments with different combinations of ion exchange membranes and resins were performed to investigate the mechanism of the process. It was found that the electrical field can enhance HA removal efficiency and the enhancement for the combination of anion exchange membrane, mixture resin (MR3) and cation exchange membrane is the most evident. Recycling and single-pass operation mode were used to study the effect of different parameters on HA removal, i.e. voltage, electrolyte concentration, flow rate of HA solution, HA concentration, pH, ionic strength and Cu2+ concentration in HA solution. Higher voltage, weak ionic strength, lower HA concentration are favorable for HA removal efficiency while electrolyte concentration and HA flow rate have an optimal value. Alkaline pH is desirable in recycling operation mode while neutral pH is desirable in single-pass operation mode.
Appears in Collections:Master's Theses (Open)

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