Degradation of trichloroethylene and tetrachloroethylene in simulated groundwater in a flow-through photosono reactor
Rashid, MdM; Sato, C
HERO ID
2128293
Reference Type
Journal Article
Year
2012
Language
English
| HERO ID | 2128293 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Degradation of trichloroethylene and tetrachloroethylene in simulated groundwater in a flow-through photosono reactor |
| Authors | Rashid, MdM; Sato, C |
| Journal | Journal of Environmental Engineering |
| Volume | 138 |
| Issue | 12 |
| Page Numbers | 1179-1185 |
| Abstract | Simulated groundwater solutions contaminated with trichloroethylene (TCE) and tetrachloroethylene (PCE) were treated in a flow-through reactor equipped with ultrasound (US) and ultraviolet light (UV) sources. The treatment process was operated using UV or US individually, and UV and US concurrently (UVUS). The solutions contaminated with TCE or PCE were exposed to UV light emitted from Hg-arc lamps surrounding the quartz reactor vessel, and to acoustic waves from a US horn located at the bottom of the reactor vessel. The rate constants (k) of photolysis by UV, sonolysis by US, and photosonolysis by UVUS were evaluated using a mathematical model in conjunction with a nonlinear regression analysis. The removal efficiencies (E) for the UV, US, and UVUS treatments were also determined. For TCE, the US rate constant (k(us) 0.016 +/- 0.010 min(-1)) and the UV rate constant (k(uv) = 0.076 +/- 0.004 min(-1)) yield the theoretical additive rate constant (k(ad)) of 0.092 min(-1), whereas the observed UVUS rate constant (k(uvus)) is 0.110 +/- 0.002 min(-1). Furthermore, the efficiency of the US treatment (E-us = 0.299) and of the UV treatment (E-uv = 0.664) gives the theoretical additive efficiency (E-ad) of 0.706, whereas the observed UVUS efficiency (E-uvus) is 0.741. For PCE, k(ad) and k(uvus) are 0.324 and 0.698 min(-1), respectively, whereas E-ad and E-uvus are 0.894 and 0.948, respectively. The results suggest that the combined effect of UV and US on the decomposition of TCE and PCE is likely synergistic. DOI: 10.1061/(ASCE)EE.1943-7870.0000590. (C) 2012 American Society of Civil Engineers. |
| Doi | 10.1061/(ASCE)EE.1943-7870.0000590 |
| Wosid | WOS:000312699700002 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN: |
| Is Public | Yes |
| Language Text | English |
| Keyword | PCE; TCE; Ultrasonic methods; Ultraviolet radiation; Water treatment; Simulated groundwater |