Abstract
(Per)fluorochemicals are highly persistent in the environment and need to be treated before discharge. Sonochemical treatment is most efficient for removal of recalcitrant pollutants such as (per)fluorochemicals. Many laboratory-scale studies have highlighted the importance of sonochemical method for removal of (per)fluorochemicals. In the present work, treatment of perfluorooctane sulfonate (PFOS) using a large sonochemical reactor of 91-L capacity was investigated. The reactor was provided with nine 1-MHz and three 500-kHz transducers and variable power dissipation with maximum rating of 12,000 W. De-fluorination and mineralization of PFOS was evaluated based on release of fluoride and sulfate ions and removal of TOC for varying initial PFOS concentration and solution pH, addition of salt, and frequencies. It has been observed that release of fluoride and sulfate ions increased with an increase in initial PFOS concentration from 0.32 to 2.6 mM and a decrease in pH of the solution from 8.5 to 4.0. The maximum concentration of fluoride and sulfate ions released after 240 min of sonication was 102.2 ± 0.2 µM and 76.6 ± 0.1 µM, respectively, for an initial PFOS concentration of 2.6 mM at pH 4. The addition of sodium chloride and sodium carbonate decreased the rate of defluorination. The present investigation is useful for the development of a sonochemical process for industrial scale operations.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 104-110 |
| Number of pages | 7 |
| Journal | Separation and Purification Technology |
| Volume | 194 |
| DOIs | |
| State | Published - Apr 3 2018 |
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Keywords
- Cavitational yield
- Dual frequency
- Megasonic frequency
- Per- and polyfluorinated compounds
- PFOS
- Sonochemical reactor
ASJC Scopus subject areas
- Analytical Chemistry
- Filtration and Separation
Cite this
Treatment of perfluorooctane sulfonic acid (PFOS) using a large-scale sonochemical reactor. / Gole, Vitthal L.; Fishgold, Asher; Sierra Alvarez, Maria Reye; Deymier, Pierre A; Keswani, Manish K.
In: Separation and Purification Technology, Vol. 194, 03.04.2018, p. 104-110.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Treatment of perfluorooctane sulfonic acid (PFOS) using a large-scale sonochemical reactor
AU - Gole, Vitthal L.
AU - Fishgold, Asher
AU - Sierra Alvarez, Maria Reye
AU - Deymier, Pierre A
AU - Keswani, Manish K
PY - 2018/4/3
Y1 - 2018/4/3
N2 - (Per)fluorochemicals are highly persistent in the environment and need to be treated before discharge. Sonochemical treatment is most efficient for removal of recalcitrant pollutants such as (per)fluorochemicals. Many laboratory-scale studies have highlighted the importance of sonochemical method for removal of (per)fluorochemicals. In the present work, treatment of perfluorooctane sulfonate (PFOS) using a large sonochemical reactor of 91-L capacity was investigated. The reactor was provided with nine 1-MHz and three 500-kHz transducers and variable power dissipation with maximum rating of 12,000 W. De-fluorination and mineralization of PFOS was evaluated based on release of fluoride and sulfate ions and removal of TOC for varying initial PFOS concentration and solution pH, addition of salt, and frequencies. It has been observed that release of fluoride and sulfate ions increased with an increase in initial PFOS concentration from 0.32 to 2.6 mM and a decrease in pH of the solution from 8.5 to 4.0. The maximum concentration of fluoride and sulfate ions released after 240 min of sonication was 102.2 ± 0.2 µM and 76.6 ± 0.1 µM, respectively, for an initial PFOS concentration of 2.6 mM at pH 4. The addition of sodium chloride and sodium carbonate decreased the rate of defluorination. The present investigation is useful for the development of a sonochemical process for industrial scale operations.
AB - (Per)fluorochemicals are highly persistent in the environment and need to be treated before discharge. Sonochemical treatment is most efficient for removal of recalcitrant pollutants such as (per)fluorochemicals. Many laboratory-scale studies have highlighted the importance of sonochemical method for removal of (per)fluorochemicals. In the present work, treatment of perfluorooctane sulfonate (PFOS) using a large sonochemical reactor of 91-L capacity was investigated. The reactor was provided with nine 1-MHz and three 500-kHz transducers and variable power dissipation with maximum rating of 12,000 W. De-fluorination and mineralization of PFOS was evaluated based on release of fluoride and sulfate ions and removal of TOC for varying initial PFOS concentration and solution pH, addition of salt, and frequencies. It has been observed that release of fluoride and sulfate ions increased with an increase in initial PFOS concentration from 0.32 to 2.6 mM and a decrease in pH of the solution from 8.5 to 4.0. The maximum concentration of fluoride and sulfate ions released after 240 min of sonication was 102.2 ± 0.2 µM and 76.6 ± 0.1 µM, respectively, for an initial PFOS concentration of 2.6 mM at pH 4. The addition of sodium chloride and sodium carbonate decreased the rate of defluorination. The present investigation is useful for the development of a sonochemical process for industrial scale operations.
KW - Cavitational yield
KW - Dual frequency
KW - Megasonic frequency
KW - Per- and polyfluorinated compounds
KW - PFOS
KW - Sonochemical reactor
UR - http://www.scopus.com/inward/record.url?scp=85034565252&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85034565252&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2017.11.009
DO - 10.1016/j.seppur.2017.11.009
M3 - Article
VL - 194
SP - 104
EP - 110
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
ER -