Natural organic matter and disinfection by-products formation potential in conv...

• Author(s): Rosa, Sónia M. ; Sousa, Vânia ; Ribau Teixeira, Margarida
• Date: 2009
• Persistent ID: http://hdl.handle.net/10400.1/1151
• Origin: Sapientia - Universidade do Algarve
• Subject(s): Natural organic matter (NOM); Disinfection by-products; HPSEC; Molecular weight (MW)
• Document Type: Conference Object
• Language: English

Description

The performance of a conventional sequence (pre-ozonation, coagulation/flocculation/sedimentation, filtration, disinfection) and two advance sequences (pre-ozonation, nanofiltration; pre-ozonation, coagulation/flocculation/sedimentation, nanofiltration) on the removal of natural organic matter (NOM) and disinfection by-products (DBPs) formation potential was evaluated. Raw and treated waters were characterized in terms of molecular weight, which includes the amount of NOM removed and the qualitative changes in the NOM characteristics (molecular weight and hydrophobicity) since they could be directly related with the DBPs formation. The results demonstrate that, for the type of raw water analysed (hydrophilic with low dissolved organic carbon content), both treatment sequences remove larger molecular weight compounds. However, the sequences with nanofiltration have a higher percentage of low molecular weight compounds removed, when compared with conventional sequence, thus the water from nanofiltration sequences will have lower DBPs formation potential.