Removal of natural organic matter from water using anionic ion-exchange resins
2003
Jasin, D.
High content of natural organic matter (NOM) in groundwater from locality Zrenjanin (Serbia, Serbia&Montenegro) makes it improper water supplying of this region. An average total organic carbon (TOC) value for the raw groundwater was 10.33 mg/l, permanganate number (PN) 40 mg/l, UV absorbance at 254 nm 0.525 and trihalomethane formation potential (THM FP) 350 microgram/l. With the aim of the NOM decreasing the ion-exchange resins in the static (batch trial) and dynamic conditions (trial with columns) were investigated for obtaining desirable drinking water quality. Chosen resins in the experiments were: Imac HP555, Imac HP661, Amberlite IRA 402Cl, Amberjet 4200Cl and Amberlite IRA 900. Strong bases ion-exchange resins Amberlite IRA 900 and Imac HP555, regenerated with 10% NaCl and 2% NaOH solution, were the most efficacious for the NOM removal from groundwater. The Imac HP555 had the maximum of adsorption capacity of 21.74 mg/g. Working with resin Imac HP555, in two columns, 1500 BV (bed volume) of raw groundwater could be processed to value PN=8 mg KMnO4/l. The results show that treatment of groundwater for NOM decreasing using macroreticular ion-exchange resins could very efficient for small water supplying systems.
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