In this study, advanced reduction processes (ARPs) was applied for degradation of 1,2-dichloroethane (1,2-DCA). ARPs are based on combining reducing reagents and activating methods to produce highly reactive, reducing free radicals. In this study, a combination of different reducing agents (dithionite ions (S2O4 2-), sulfite ions (SO3 2-) and sulfide ions (S2-)) and two activating methods (medium pressure mercury (UV-M) lamp, narrow-banded mercury (UV-N) lamp) were evaluated for 1,2-DCA degradation. In the screening test, S2O4 2- was more effective than the other reducing agents during UV irradiation. Experimental results showed that the S2O4 2-/UV-M system degraded 1,2-DCA completely after 4 h of irradiation time over a wide range of pH values. In the alkaline solution, however, complete degradation of 1,2-DCA was also observed with all of three reducing agents under irradiation of UV-M lamp. UV-N/S2O 4 2- gave slower degradation of 1,2-DCA, but complete removal was observed eventually except acidic pH condition. This work could provide information on a practical application of ARPs to treat chlorinated organics.
- Advanced reducing process
- Reducing agents
- UV irradiation
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Waste Management and Disposal
- Process Chemistry and Technology