Abstract
The photochemical degradation of trichloroacetic acid (TCAA) employing ultraviolet (UV) irradiation/hydrogen peroxide (H 2 O 2 )/micro-aeration (MCA) combination process was investigated by varying operational parameters. Relatively slow TCAA degradation was observed during direct UV radiation and H 2 O 2 oxidation, while TCAA cannot be removed by MCA alone. UV/H 2 O 2 /MCA combination process proved to be more effective than UV/H 2 O 2 . With the initial concentration of 55.7 μg I -1 , more than 93.4% of TCAA can be removed within 180 min under UV radiation intensity of 1,048.7 μW cm -2 , H 2 0 2 dosage of 30 mg I -1 and MCA flow rate of 25 I min -1 in neutral conditions. Removal rate of TCAA was sensitive to UV radiation intensity, H 2 O 2 dose and solution pH, but appeared to be slightly influenced by initial TCAA concentration. There was a higher correlation between pseudo-first rate constant k and UV intensity and H 2 O 2 dosage, implying that higher removal capacity can be achieved by improvement of both factors. The newly found trichloroacetamide (TCAcAm), the potential TCAA, was more frangible than TCAA, indicating that TCAA hardly regenerates by hydrolysis of TCAcAm. Finally, a preliminary cost analysis revealed that the UV/H 2 O 2 /MCA process was more cost-effective than the UV/H 2 O 2 process in removal of TCAA from drinking water.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Water Supply: Research and Technology-Aqua
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
