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Modelling disinfection by-products formation in bromide-containing waters
1Department of Hydraulics, Geotechnics and Environmental Engineering, University of Naples Federico II, Naples, Italy. fabbrici@unina.it
Journal of Hazardous Materials
|March 21, 2009
Summary
This study introduces a kinetic model to predict disinfection by-products (DBPs) in bromide-rich waters. The model accurately simulates DBP formation by analyzing reactions between disinfectants and natural organic matter (NOM).
Area of Science:
- Environmental Chemistry
- Water Treatment
- Chemical Kinetics
Background:
- Disinfection processes in bromide-containing waters can generate harmful disinfection by-products (DBPs).
- Understanding the complex reaction pathways involving natural organic matter (NOM) is crucial for predicting DBP formation.
Purpose of the Study:
- To develop and validate a kinetic model for simulating DBP formation in bromide-rich waters during disinfection.
- To provide explicit expressions for DBP species by modeling incorporation and oxidation reactions.
Main Methods:
- A kinetic model based on two parallel reaction sequences (incorporation and oxidation) of bromine or chlorine with NOM.
- First-order kinetics applied to NOM decay and halogenated intermediate reactions.
- Introduction of splitting coefficients to simulate DBP generation reactions.
Main Results:
- The model successfully simulates the formation of various DBP species.
- Explicit expressions for DBP concentrations were derived.
- Model predictions showed high precision when compared with experimental data from seawater samples.
Conclusions:
- The developed kinetic model is a valuable tool for predicting DBP formation in bromide-containing waters.
- The model's accuracy supports its application in water treatment and risk assessment strategies.
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