Multipass membrane air-stripping (MAS) for removing volatile organic compounds (VOCs) from surfactant micellar solutions
Cheng, H; Hu, Y; Luo, J; Sabatini, DA
HERO ID
2551906
Reference Type
Journal Article
Year
2009
Language
English
PMID
| HERO ID | 2551906 |
|---|---|
| In Press | No |
| Year | 2009 |
| Title | Multipass membrane air-stripping (MAS) for removing volatile organic compounds (VOCs) from surfactant micellar solutions |
| Authors | Cheng, H; Hu, Y; Luo, J; Sabatini, DA |
| Journal | Journal of Hazardous Materials |
| Volume | 170 |
| Issue | 2-3 |
| Page Numbers | 1070-1078 |
| Abstract | Air-stripping is one of the most effective technologies for removing volatile organic compounds (VOCs) from surfactant solutions, although the presence of surfactant poses some unique challenges. This study evaluated the effect of a mixed surfactant system on the apparent Henry's law constant of tetrachloroethylene (PCE) and the efficiency of PCE removal from surfactant solutions using a lab-scale hollow fiber membrane contactor. Results show that the presence of surfactant significantly reduced the apparent Henry's law constant of PCE, and the reduction was proportional to the total surfactant concentration. PCE removal efficiency by membrane air-stripping (MAS) decreased as the surfactant system transitioned from solubilization to supersolubilization. Besides significantly reducing the apparent volatility of VOCs, the presence of surfactant brings additional mass transfer resistance in air-stripping, which makes it difficult to achieve high levels of contaminant removal, even at very high air/liquid (A/L) ratios. In contrast, multipass/multistage MAS operated at low A/L ratios could achieve near 100% contaminant removal because of less mass transfer limitation during each stripping pass/stage. Experimental results, together with model calculations demonstrate multipass (and multistage) air-stripping as a cost-effective alternative for removing VOCs from surfactant micellar solutions compared to the options of using large air strippers or operating at high A/L ratios. (C) 2009 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.jhazmat.2009.05.072 |
| Pmid | 19520499 |
| Wosid | WOS:000270310500074 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN: |
| Is Public | Yes |
| Language Text | English |
| Keyword | Surfactant micellar solution; Volatile organic compounds (VOCs); Membrane air-stripping (MAS); Multipass/multistage process; Separation; Reuse |