Dissolved organic matter removal and disinfection byproduct formation control using ion exchange

摘要: Abstract Three different ion exchange resins were evaluated for their ability to remove dissolved organic matter (DOM) and reduce formation of disinfection byproducts (DBPs) formed during chlorination surface waters sampled from the Intercoastal Waterway, Myrtle Beach, SC, USA (MB water), Tomhannock Reservoir, Troy, NY, (TMK water). At resin doses up 600 mg/L, DOC levels reduced 30 70%, while total trihalomethane haloacetic acid reactivity (i.e., TTHM/DOC HAA9/DOC) was 40 70% 50%, respectively. This suggests that exchange, alone or in combination with other processes, holds promise removing a broad spectrum DBP precursors. Chloride release measured confirm an mechanism, but possibility physisorption hydrogen bonding mechanisms not ruled out. Ion appeared selectively high-specific UV-absorbing SUVA254) DOM components TMK water; these also had highest molecular weights. However, this case MB water. The “SUVA254 profile”, relationship between SUVA254 (TTHM/DOC HAA9/DOC), showed significant differences patterns observed previously separation processes (e.g., coagulation activated carbon adsorption) rely primarily on hydrophobic interactions as mechanism.