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AWWA ACE65504
- Predicting NOM Removal and Particle Destabilization with Surface Complexation Modeling
- Conference Proceeding by American Water Works Association, 06/01/2007
- Publisher: AWWA
$12.00$24.00
The objectives of this powerpoint presentation were: to formulate a surface complexation modelto simultaneously predict natural organic matter (NOM)sorption and particle stability; and, to calibrate the proposed model with datafrom AWWA's Enhanced Coagulation andSoftening Database. The presentation outlines the modeling approach, including: Overview of the Diffuse Layer Model (DLM); reactions of NOM; calibration data; surface complexation reactions; and, model parameters.Results are presented, along with conclusions that include: DLM provides excellent prediction of dissolved organic carbon (DOC) removalfor seven source waters;surface potential prediction requires considerationof other potential-determining ions (e.g., Ca<sup>2+</sup>,CO<sub>3</sub><sup>2-</sup>, SO<sub>4</sub><sup>2-</sup>);best model fits were obtained for waters with lowand moderate alkalinity, further research isneeded to improve model for high-alkalinity waters; and,the DLM yields practical information that can beused to optimize treatment.
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