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| Electrochemical degradation of petroleum hydrocarbons enhanced by surfactants |
| Received:March 20, 2024 |
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| KeyWord:soil remediation;petroleum hydrocarbon pollution;surfactant;microbial eletrochemistry;microorganisms |
| Author Name | Affiliation | E-mail | | CHEN Yonggang | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
AgroEnvironmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China | | | LI Desheng | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | YU Xin | AgroEnvironmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China | | | LI Xiaojing | AgroEnvironmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China | lixiaojing@caas.cn |
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| Abstract: |
| Aging and high concentrations of oil-contaminated soils hinder the application of bioremediation. In order to improve the remediation efficiency of petroleum hydrocarbon contaminated soil, five types of surfactants[non-ionic surfactant Twain 80（TW-80）, ampholytic surfactant cocoamidopropyl betaine（CAB）, biological surfactant rhamnolipid（RHA）, anionic surfactant sodium dodecyl benzene sulfonate（SDBS）and cationic surfactant octadecyl trimethyl ammonium chloride（ODAC）] were used in this study. Petroleum hydrocarbons were leached from solid phase to liquid phase and microbial electrochemical system was used to improve the remediation efficiency of petroleum hydrocarbon contaminated soil. The extraction effect is as follows：SDBS（81%）＞CAB（76%）＞ODAC（74%）＞ TW-80（71%）＞RHA（50%）, which was determined by the characteristics of surfactants. Although the extraction efficiency of SDBS and ODAC is excellent, it will greatly affect the microbial community and is not suitable for degradation by this method. The degradation effect of petroleum hydrocarbons is as follows：CAB（88%）＞TW-80（74%）＞RHA（53%）, which was controlled by the microbial community. The efficiency of extraction and degradation can be further improved by continuously optimizing surfactant concentration, reaction time and compounding. |
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