Correlations between structural changes of seawater organic matter and DBP formation in seawater chlorination
chlorination, disinfection by-products, seawater organic matter
Chlorination pretreatment of seawater upon intake in seawater desalination systems changes the structures of seawater organic matter (SOM) and forms disinfection by products (DBPs). This study investigated the changes of specific ultraviolet absorbance (SUVA) and fluorescence excitation emission matrix (FEEM) of SOM seawater chlorination under different conditions, and their correlations with the DBP/total organic halogen (TOX) formation. Most SUVA values and all FEEM values decreased, suggesting that SOM was degraded in chlorination. Changes in SUVA/FEEM of SOM had strong correlations with the concentrations of the identified DBP/TOX at different chlorine dosages and temperatures, and had moderate correlations at different contact times, suggesting changes of aromatic fractions and soluble microbial byproduct-like and humic acid-like components in SOM at different chlorine dosages, temperatures and contact times led to the DBP/TOX formation.
The 2nd Disinfection and Disinfection By-Products Conference, 14-18 May 2018, Tsinghua University, Beijing, China
The International Water Association
Wang, C.,Liu, J.,Ling, L.,& Shang, C. (2018). Correlations between structural changes of seawater organic matter and DBP formation in seawater chlorination. The 2nd Disinfection and Disinfection By-Products Conference, 14-18 May 2018, Tsinghua University, Beijing, China, 1-4. Retrieved from https://repository.vtc.edu.hk/thei-fac-sci-tech-sp/461