Degradation Behaviors of Trichloroethylene by Permanganate

Yi Chu Huang; Shun Yi Huang; Shin Shian Chen; Chen Yao Ma; Hung Chieh Chen

doi:10.4028/www.scientific.net/AMR.1051.588

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1051Degradation Behaviors of Trichloroethylene by...

Degradation Behaviors of Trichloroethylene by Permanganate

Abstract:

Surfactant-enhanced permanganate oxidation (SEPO) technology utilizes the surfactant to mobilize and/or solubilize the dense-non-aqueous-phase liquids (DNAPLs) and then exploits the high oxidation capacity of permanganate (MnO₄^-) to oxidize them. SEPO technology has been shown as an effective way to remediate the aquifers contaminated with chlorinated organic pollutants such as trichloroethylene (TCE). Experiments were carried out with a series of continuous stir batch reactor to quantify the kinetic parameters of which MnO₄^- oxidizes the aqueous TCE in the presence of surfactant. It was found that TCE followed the observed pseudo-first-order reaction with respect to MnO₄^- whether the surfactants were present or not. In the absence of surfactants, the observed pseudo-first-order rate constant (k_obs) and half-life (t_1/2) were 0.12-0.25 min^-1 and 2.5-7.1 min for MnO₄^-, respectively. For the Tween80 concentration less than its critical micelle concentration (CMC), the k_obs value was 0.14 min^-1 and the t_1/2 was 2.6 min for MnO₄^-. As the Tween80 concentration exceeded its CMC, the k_obs values increased to 0.32-0.37 min^-1 and the t_1/2 reduced to 0.44-0.46 min. The results showed that combination of permanganate with a proper type of surfactant can speed up the removal of contaminants in aquifers.

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Periodical:

Advanced Materials Research (Volume 1051)

Pages:

588-593

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1051.588

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Online since:

October 2014

Authors:

Yi Chu Huang*, Shun Yi Huang, Shin Shian Chen, Chen Yao Ma, Hung Chieh Chen

Keywords:

Half-Life, Permanganate, Pseudo-First-Order Rate Constant, Surfactant, Trichloroethylene

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