Hydrolysis and H2O2-assisted UV photolysis of 3-chloro-1,2-propanediol.
3-Chloro-1,2-propanediol (3-MCPD) is a chlorinated alcohol that is often formed as a by-product in the manufacturing of food products. In addition, 3-MCPD may be a disinfection by-product from wastewater treatment by chlorine and may be present in drinking waters from purification plants using epichlorohydrin-linked cationic polymer resins as flocculants. Due to concerns about the toxicity of 3-MCPD and its potential presence in water samples, the removal of 3-MCPD from water should be addressed and examined. For the first time a systematic examination of the removal of 3-MCPD via hydrolysis and photolysis processes is presented. 3-MCPD is shown to undergo hydrolysis at near neutral pH values, but at much slower rates than can be obtained by UV/H2O2 processes. 3-MCPD does not undergo rapid direct photolysis. Re-evaluation of temperature and pH dependent hydrolysis rate data indicates that hydrolysis is first order with respect to [OH(-)].
Nienow
Amanda M
AM
Purdue University, School of Civil Engineering, 550 Stadium Mall Drive, West Lafayette, IN 47907, United States.
Poyer
Irene C
IC
Hua
Inez
I
Jafvert
Chad T
CT
D005990:Glycerol / Q000031:analogs & derivatives* / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007700:Kinetics; D010782:Photolysis; D013696:Temperature; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D000517:alpha-Chlorohydrin
D014874:Water Pollutants, Chemical; D000517:alpha-Chlorohydrin; D006861:Hydrogen Peroxide; D005990:Glycerol