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Contributions of Electrokinetics and Bioremediation in the Treatment of Different Petroleum Components
Author(s) -
Fan Ruijuan,
Guo Shuhai,
Li Tingting,
Li Fengmei,
Yang Xuelian,
Wu Bo
Publication year - 2015
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300659
Subject(s) - electrokinetic phenomena , bioremediation , chemistry , degradation (telecommunications) , hydrocarbon , electric field , environmental chemistry , petroleum , electrokinetic remediation , environmental remediation , contamination , organic chemistry , biology , ecology , telecommunications , physics , quantum mechanics , computer science
The present study investigated the contributions of electrokinetics (EK) and bioremediation (BIO) in the treatment of different petroleum components by using bio‐electrokinetics (BIO‐EK) technology with a 2‐dimensional (2‐D) electric field. The spatiotemporal changes of the contents of total petroleum hydrocarbons (TPH) and its components, as well as microbial activity, were determined during remediation. The results demonstrated that the contribution rate of EK showed a significant positive correlation with electric intensity, while that of BIO was the opposite. The efficiency of BIO was stimulated by the electric field in the coupled BIO‐EK technology, signifying a synergistic effect between EK and BIO. According to the components analysis, alkanes decreased most intensively compared with other components, indicating that alkanes are more susceptible to both EK and BIO. For n ‐alkanes, the degradation efficiency was inversely proportional to hydrocarbon chain length. The contribution of EK was higher than that of BIO in the treatment of alkanes, and the contribution of BIO was higher than that of EK in the degradation of aromatics. The use of a 2‐D electric field led to enhanced microbial activity compared to BIO alone. The dehydrogenase activity increased significantly during the first 70 days, correlating with extent of TPH degradation.